{
  "schema_version": 1,
  "namespace": "embodied-sim50",
  "task_count": 50,
  "source_repository": "https://www.modelscope.ai/datasets/li-jm25/VideoICL_Embodied_Set.git",
  "source_commit": "91a4f75441065c01d94da57fc95233f2000dd1cb",
  "label_policy": "视频内容优先；A/B/C按组内原文件编号顺序命名；不保证与原题单A/B/C同名规则一致。",
  "review_limits": "逐片时序抽帧核对，重点片段加密复查；不是逐帧播放或物理仿真验收。",
  "source_dataset": "Aoraku/VideoICL-Embodied-RealWorld50",
  "simulation_status": "complete_mixed_criteria_demos",
  "episode_count": 150,
  "strict_verified_episode_count": 147,
  "partial_rotation_demo_count": 3,
  "video_count": 600,
  "required_episode_count": 150,
  "missing_episodes": [],
  "views": [
    "head",
    "left_wrist",
    "right_wrist",
    "multiview"
  ],
  "tasks": [
    {
      "id": "E01",
      "title": "套餐选配装盘",
      "category": "选择/集合",
      "inference_prompt": "按示范中的食物选择组合，把相应食物装入餐盘，其余留在桌上。",
      "evaluation_scope": "所选两件在盘内并释放；未选件不入盘。",
      "scope_note": "成员选择；不把左右落点或拿取先后加为规则。",
      "variants": [
        {
          "video_id": "E01-A",
          "variant": "A",
          "observed_demo": "汉堡和薯条装盘，饮料留外",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E01/E01_A__head.mp4",
              "sha256": "f6b13830a1d4ec5b639e6f1b6260628dda4369e2f4df2d05fe516258cbe411bc",
              "bytes": 1281115,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1127,
              "fps": 25.0,
              "duration_seconds": 45.08
            },
            "left_wrist": {
              "path": "media/E01/E01_A__left_wrist.mp4",
              "sha256": "99aa9e135fc4ca9cd0e3def997e600c08584cee22f7b42fb77dd69f200ee4233",
              "bytes": 1516799,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1127,
              "fps": 25.0,
              "duration_seconds": 45.08
            },
            "right_wrist": {
              "path": "media/E01/E01_A__right_wrist.mp4",
              "sha256": "d49cd6e2af41ffa7af8a5301fad75dc2632d8cbfe6a705fb9fd52604789f1c68",
              "bytes": 374119,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1127,
              "fps": 25.0,
              "duration_seconds": 45.08
            },
            "multiview": {
              "path": "media/E01/E01_A__multiview.mp4",
              "sha256": "07fc22f393b4b33dfe21db15f8c76ba38fdfe51ef2924d43846b43f71fbdcb14",
              "bytes": 3359287,
              "source": "native_synchronized_composite",
              "width": 1440,
              "height": 720,
              "frames": 1127,
              "fps": 25.0,
              "duration_seconds": 45.08
            }
          }
        },
        {
          "video_id": "E01-B",
          "variant": "B",
          "observed_demo": "汉堡和饮料装盘，薯条留外",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E01/E01_B__head.mp4",
              "sha256": "b00cef61b877d8bba3480b13b6aefd8e60c3202d0ce3e14294f75f1a51cd6918",
              "bytes": 1235004,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1135,
              "fps": 25.0,
              "duration_seconds": 45.4
            },
            "left_wrist": {
              "path": "media/E01/E01_B__left_wrist.mp4",
              "sha256": "81d3d0a5e0230a42e8a089a3875c26e6bcc23fb7018f766dd98c6795680dae5d",
              "bytes": 824152,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1135,
              "fps": 25.0,
              "duration_seconds": 45.4
            },
            "right_wrist": {
              "path": "media/E01/E01_B__right_wrist.mp4",
              "sha256": "5dfee8317ac930ae49e6aa7043213bbfe30ff8c69b5d8145eb0e66709cd41236",
              "bytes": 910592,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1135,
              "fps": 25.0,
              "duration_seconds": 45.4
            },
            "multiview": {
              "path": "media/E01/E01_B__multiview.mp4",
              "sha256": "50b53196e86db0cdec144f7ede7f96c2c8c1921c6e115f0a38e68e9a51ba886c",
              "bytes": 3173781,
              "source": "native_synchronized_composite",
              "width": 1440,
              "height": 720,
              "frames": 1135,
              "fps": 25.0,
              "duration_seconds": 45.4
            }
          }
        },
        {
          "video_id": "E01-C",
          "variant": "C",
          "observed_demo": "薯条和饮料装盘，汉堡留外",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E01/E01_C__head.mp4",
              "sha256": "5e1e2c26e651d873855ab4ca9c626e720b0fd0faa7d28615d0de4b745c1d6991",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1210,
              "fps": 25.0,
              "duration_seconds": 48.4
            },
            "left_wrist": {
              "path": "media/E01/E01_C__left_wrist.mp4",
              "sha256": "11a3a2ac7b60be652e4270b7a27ccd1b1517ccd8d092675cba3c3343ed4ceb24",
              "bytes": 1052808,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1210,
              "fps": 25.0,
              "duration_seconds": 48.4
            },
            "right_wrist": {
              "path": "media/E01/E01_C__right_wrist.mp4",
              "sha256": "5e0e9735dbb89fe423b1bb16cd8d28c095ebfe91489f834af66f406f7a7e561e",
              "bytes": 907910,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1210,
              "fps": 25.0,
              "duration_seconds": 48.4
            },
            "multiview": {
              "path": "media/E01/E01_C__multiview.mp4",
              "sha256": "19afb3d65aef4387eeb70ea0eebb1b10f8dc58f864e54486f3465556aae5b7c1",
              "bytes": 3394581,
              "source": "native_synchronized_composite",
              "width": 1440,
              "height": 720,
              "frames": 1210,
              "fps": 25.0,
              "duration_seconds": 48.4
            }
          }
        }
      ]
    },
    {
      "id": "E02",
      "title": "三色块叠放",
      "category": "叠放/次序",
      "inference_prompt": "按示范中的颜色层序，把三个色块叠成稳定的一摞。",
      "evaluation_scope": "按从底到顶的颜色支撑关系判定；全部释放。",
      "scope_note": "实物是带四孔的薄方块，三层真实叠放。",
      "variants": [
        {
          "video_id": "E02-A",
          "variant": "A",
          "observed_demo": "自下而上红、绿、蓝",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E02/E02_A__head.mp4",
              "sha256": "bc6c95f7968ed2c53e2f11525c09cf6974729cad2b3237b51e042eb85090232e",
              "bytes": 831076,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 852,
              "fps": 25.0,
              "duration_seconds": 34.08
            },
            "left_wrist": {
              "path": "media/E02/E02_A__left_wrist.mp4",
              "sha256": "7716e6ed88331229699b7be745b3b64727fb04724f719c4cffc26c838b10f699",
              "bytes": 290791,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 852,
              "fps": 25.0,
              "duration_seconds": 34.08
            },
            "right_wrist": {
              "path": "media/E02/E02_A__right_wrist.mp4",
              "sha256": "8c154fea0f6cbba7c2bf3fead2f6b8e2b7cc59cdc555e022a9650cadfc2c7666",
              "bytes": 1003046,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 852,
              "fps": 25.0,
              "duration_seconds": 34.08
            },
            "multiview": {
              "path": "media/E02/E02_A__multiview.mp4",
              "sha256": "0edb3c22f306334005950f59f237f89d975c6a776d1e4f7b31645efce84aa650",
              "bytes": 2159816,
              "source": "native_synchronized_composite",
              "width": 1440,
              "height": 720,
              "frames": 852,
              "fps": 25.0,
              "duration_seconds": 34.08
            }
          }
        },
        {
          "video_id": "E02-B",
          "variant": "B",
          "observed_demo": "自下而上绿、蓝、红",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E02/E02_B__head.mp4",
              "sha256": "ce521419804791eb9bc1d0bef89aae1e76e6b223cb2374d1c66e18d300f2aab1",
              "bytes": 818822,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 843,
              "fps": 25.0,
              "duration_seconds": 33.72
            },
            "left_wrist": {
              "path": "media/E02/E02_B__left_wrist.mp4",
              "sha256": "fe39c065bee83c1fc551e51dfdc6ecfb5e517a7d574dbb7a96eada7ce754eced",
              "bytes": 287403,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 843,
              "fps": 25.0,
              "duration_seconds": 33.72
            },
            "right_wrist": {
              "path": "media/E02/E02_B__right_wrist.mp4",
              "sha256": "5ebce265a9273dab41a8d53ee8c5762986ef5cbc81ca3d3856b417383e0a3c1e",
              "bytes": 1001641,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 843,
              "fps": 25.0,
              "duration_seconds": 33.72
            },
            "multiview": {
              "path": "media/E02/E02_B__multiview.mp4",
              "sha256": "c0e865108866cd59c8d81f6092fb5539a3509060995e16c1fe5559e0788b43e8",
              "bytes": 2151688,
              "source": "native_synchronized_composite",
              "width": 1440,
              "height": 720,
              "frames": 843,
              "fps": 25.0,
              "duration_seconds": 33.72
            }
          }
        },
        {
          "video_id": "E02-C",
          "variant": "C",
          "observed_demo": "自下而上蓝、红、绿",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E02/E02_C__head.mp4",
              "sha256": "a9f34afaac4e51ae0f504036bcbeba9505eb8ce45b07ac5b5abb9d7df968fb38",
              "bytes": 810343,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 827,
              "fps": 25.0,
              "duration_seconds": 33.08
            },
            "left_wrist": {
              "path": "media/E02/E02_C__left_wrist.mp4",
              "sha256": "087a77934f71989b3b8b2dc1f7a4db866894ef1e5ca44846eaa9af5c0d99e4fc",
              "bytes": 284269,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 827,
              "fps": 25.0,
              "duration_seconds": 33.08
            },
            "right_wrist": {
              "path": "media/E02/E02_C__right_wrist.mp4",
              "sha256": "b3888a49e40c527497a09047894bf942f10f53e1628f18cc27dd33b3deb8c53c",
              "bytes": 977265,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 827,
              "fps": 25.0,
              "duration_seconds": 33.08
            },
            "multiview": {
              "path": "media/E02/E02_C__multiview.mp4",
              "sha256": "85a4031ef1bab6af51e743faae0a37e82157a65f8c9c6fb9a20ef3395e029ebd",
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              "width": 1440,
              "height": 720,
              "frames": 827,
              "fps": 25.0,
              "duration_seconds": 33.08
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          }
        }
      ]
    },
    {
      "id": "E03",
      "title": "三色杯套叠",
      "category": "套叠/次序",
      "inference_prompt": "按示范中的颜色内外次序，把三个杯子套在一起。",
      "evaluation_scope": "杯口向上，外中内颜色对应，三杯稳定套入。",
      "scope_note": "杯口均朝上。实录独立三条；颜色关系与积木叠放同构，任务技能为容器套叠。",
      "variants": [
        {
          "video_id": "E03-A",
          "variant": "A",
          "observed_demo": "外层到内层：红、绿、蓝",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E03/E03_A__head.mp4",
              "sha256": "b70457d73aba61acade771e39b75c0a46100ffe538636e61b041af85b74e5916",
              "bytes": 2332874,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2827,
              "fps": 25.0,
              "duration_seconds": 113.08
            },
            "left_wrist": {
              "path": "media/E03/E03_A__left_wrist.mp4",
              "sha256": "ff7ba8fc6ccc87268d236e525e1da24de89663133f4f8566d9a580fbaaddfffd",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2827,
              "fps": 25.0,
              "duration_seconds": 113.08
            },
            "right_wrist": {
              "path": "media/E03/E03_A__right_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2827,
              "fps": 25.0,
              "duration_seconds": 113.08
            },
            "multiview": {
              "path": "media/E03/E03_A__multiview.mp4",
              "sha256": "9d3e696e6214bd23816c46eda0af32fa096a5d2b36b6b63eb1d05204b1741fb9",
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              "width": 1440,
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              "frames": 2827,
              "fps": 25.0,
              "duration_seconds": 113.08
            }
          }
        },
        {
          "video_id": "E03-B",
          "variant": "B",
          "observed_demo": "外层到内层：绿、蓝、红",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E03/E03_B__head.mp4",
              "sha256": "e888e308d38189b49ee0b43926ce1d41abd68f7c91a1bbc9e0de93a3ed758a47",
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              "width": 640,
              "height": 480,
              "frames": 2761,
              "fps": 25.0,
              "duration_seconds": 110.44
            },
            "left_wrist": {
              "path": "media/E03/E03_B__left_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2761,
              "fps": 25.0,
              "duration_seconds": 110.44
            },
            "right_wrist": {
              "path": "media/E03/E03_B__right_wrist.mp4",
              "sha256": "c88f1138b099b4c5cfe20782029779c0cef7d04fb3ecf911ebf2e1f9d2453f5e",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2761,
              "fps": 25.0,
              "duration_seconds": 110.44
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            "multiview": {
              "path": "media/E03/E03_B__multiview.mp4",
              "sha256": "a09671031ee1fdc7f63742e57f7c8d58121d7ca78db19bd15337f133480b9d3a",
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              "fps": 25.0,
              "duration_seconds": 110.44
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          }
        },
        {
          "video_id": "E03-C",
          "variant": "C",
          "observed_demo": "外层到内层：蓝、红、绿",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E03/E03_C__head.mp4",
              "sha256": "e5771b1d531b8db84b13a8f14a0d7f4dc38fce864a4b7ab8bf8babce31579f0c",
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              "height": 480,
              "frames": 2701,
              "fps": 25.0,
              "duration_seconds": 108.04
            },
            "left_wrist": {
              "path": "media/E03/E03_C__left_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2701,
              "fps": 25.0,
              "duration_seconds": 108.04
            },
            "right_wrist": {
              "path": "media/E03/E03_C__right_wrist.mp4",
              "sha256": "35448256abe858c3e3ec0aa5d44aae2a3b8ab69e96b54b59bdb858bb3037319d",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 108.04
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            "multiview": {
              "path": "media/E03/E03_C__multiview.mp4",
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          }
        }
      ]
    },
    {
      "id": "E04",
      "title": "彩杯与图形配对",
      "category": "颜色→图形",
      "inference_prompt": "按示范中杯子颜色与图形的对应关系，把三个杯子摆到相应标记上。",
      "evaluation_scope": "每杯落在对应图形标记区域并释放。",
      "scope_note": "实录为三个彩杯配三图形，不是单杯三选一。方形纸标为旋转的正方形。",
      "variants": [
        {
          "video_id": "E04-A",
          "variant": "A",
          "observed_demo": "绿杯→三角；蓝杯→圆；红杯→方",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E04/E04_A__head.mp4",
              "sha256": "3b5a272dff0b7f9334e3e44b9efbcc0224de5ec2ece41897294f103c7b940940",
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              "height": 480,
              "frames": 2682,
              "fps": 25.0,
              "duration_seconds": 107.28
            },
            "left_wrist": {
              "path": "media/E04/E04_A__left_wrist.mp4",
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              "source": "native_independent_camera",
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              "frames": 2682,
              "fps": 25.0,
              "duration_seconds": 107.28
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            "right_wrist": {
              "path": "media/E04/E04_A__right_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2682,
              "fps": 25.0,
              "duration_seconds": 107.28
            },
            "multiview": {
              "path": "media/E04/E04_A__multiview.mp4",
              "sha256": "d5846a02afc557a951b2c93791666830fc33592f8590992a4c9cf9b5210f27f3",
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              "width": 1440,
              "height": 720,
              "frames": 2682,
              "fps": 25.0,
              "duration_seconds": 107.28
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          }
        },
        {
          "video_id": "E04-B",
          "variant": "B",
          "observed_demo": "绿杯→方；蓝杯→圆；红杯→三角",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E04/E04_B__head.mp4",
              "sha256": "10c5c8294331ef6c424c637bed1f8af9e50d629d4b8b2393df57fbe2e480ff1b",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1485,
              "fps": 25.0,
              "duration_seconds": 59.4
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            "left_wrist": {
              "path": "media/E04/E04_B__left_wrist.mp4",
              "sha256": "b37d9d4ecbcdb7f9209c11968bcc89944facfc9bb2bee2429ef3e12217fde235",
              "bytes": 479217,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1485,
              "fps": 25.0,
              "duration_seconds": 59.4
            },
            "right_wrist": {
              "path": "media/E04/E04_B__right_wrist.mp4",
              "sha256": "ac5ab8c9fa90491a72271d92a0f97e422f695cd0803cdaaed402d022c1bc54f9",
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              "width": 640,
              "height": 480,
              "frames": 1485,
              "fps": 25.0,
              "duration_seconds": 59.4
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            "multiview": {
              "path": "media/E04/E04_B__multiview.mp4",
              "sha256": "c13873ef9231b0751b0ed2ab778851824edea69e7c0b27303ee50fd7c3f3146d",
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              "width": 1440,
              "height": 720,
              "frames": 1485,
              "fps": 25.0,
              "duration_seconds": 59.4
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          }
        },
        {
          "video_id": "E04-C",
          "variant": "C",
          "observed_demo": "绿杯→圆；蓝杯→三角；红杯→方",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E04/E04_C__head.mp4",
              "sha256": "2cc366fa06c4cedc34910b15ae59277517977dbeda0596cd6704c79850822ac2",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1520,
              "fps": 25.0,
              "duration_seconds": 60.8
            },
            "left_wrist": {
              "path": "media/E04/E04_C__left_wrist.mp4",
              "sha256": "3110cdd463311aafe3cab6607f92cb9b735413f12977a0421376953e155f192e",
              "bytes": 492873,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1520,
              "fps": 25.0,
              "duration_seconds": 60.8
            },
            "right_wrist": {
              "path": "media/E04/E04_C__right_wrist.mp4",
              "sha256": "21b07db62d78cd7f7058d1c22759ac9f212b21ed74e4886f8cc01899df79e377",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1520,
              "fps": 25.0,
              "duration_seconds": 60.8
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            "multiview": {
              "path": "media/E04/E04_C__multiview.mp4",
              "sha256": "09b5b89c794590bfe030fa877ffa936f4f4471b841305911ef7b87b3f1af494a",
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              "height": 720,
              "frames": 1520,
              "fps": 25.0,
              "duration_seconds": 60.8
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          }
        }
      ]
    },
    {
      "id": "E05",
      "title": "形状块与图形配对",
      "category": "形状→图形",
      "inference_prompt": "按示范中物体形状与图形的对应关系，摆放全部三个物体。",
      "evaluation_scope": "逐件核对三个物体与目标图形的对应关系，三件均需完成摆放。",
      "scope_note": "三件物体按形状与平面标记配对；A同形配对，B/C为不同的指定映射。颜色与形状在片中共变，执行提示应明确学习形状对应关系，不附加拿取顺序。",
      "variants": [
        {
          "video_id": "E05-A",
          "variant": "A",
          "observed_demo": "方块→方形；球→圆形；三角块→三角形",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E05/E05_A__head.mp4",
              "sha256": "205a4cb8af53ed721e73e76ac8dbaaeff622a1e98b345029e09e47af423adb90",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1499,
              "fps": 25.0,
              "duration_seconds": 59.96
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            "left_wrist": {
              "path": "media/E05/E05_A__left_wrist.mp4",
              "sha256": "72765a1ff883ca3f00b4513f3a849e9e012f8d219ffde52821f8c4d078114e47",
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              "width": 640,
              "height": 480,
              "frames": 1499,
              "fps": 25.0,
              "duration_seconds": 59.96
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            "right_wrist": {
              "path": "media/E05/E05_A__right_wrist.mp4",
              "sha256": "e12ea702386eeccca368b9f989cc2dcd3b1071264c939b98043579e050c910ec",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1499,
              "fps": 25.0,
              "duration_seconds": 59.96
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            "multiview": {
              "path": "media/E05/E05_A__multiview.mp4",
              "sha256": "c1cef1ca994d27210c6d0845c4426fa63859c0de0393e380fef5f378c01d71a6",
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              "width": 1440,
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              "frames": 1499,
              "fps": 25.0,
              "duration_seconds": 59.96
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          }
        },
        {
          "video_id": "E05-B",
          "variant": "B",
          "observed_demo": "方块→圆；球→三角；三角→方",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E05/E05_B__head.mp4",
              "sha256": "503743250c9413a97dbd4f2999a6a8b4393eea2c95ce5d5934ff30ad077df47b",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1638,
              "fps": 25.0,
              "duration_seconds": 65.52
            },
            "left_wrist": {
              "path": "media/E05/E05_B__left_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1638,
              "fps": 25.0,
              "duration_seconds": 65.52
            },
            "right_wrist": {
              "path": "media/E05/E05_B__right_wrist.mp4",
              "sha256": "39a1c5dd4032f83403fbf56a893d9cf70ba677f1db45c68c92536c1c01adaa6c",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1638,
              "fps": 25.0,
              "duration_seconds": 65.52
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            "multiview": {
              "path": "media/E05/E05_B__multiview.mp4",
              "sha256": "50ea6c69e48a9f39f7b89f644acd592af7d2db0a016cc43a56d20deabfd9c335",
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              "fps": 25.0,
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          }
        },
        {
          "video_id": "E05-C",
          "variant": "C",
          "observed_demo": "方块→三角；球→方；三角→圆",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E05/E05_C__head.mp4",
              "sha256": "0bc1d9d1e5c8cb168783263a8a186882081beb21af30b14d12f444e6aada3c2d",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1490,
              "fps": 25.0,
              "duration_seconds": 59.6
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            "left_wrist": {
              "path": "media/E05/E05_C__left_wrist.mp4",
              "sha256": "7343d47666aa05fa8f916240009f8736616faed09ff73095025d2196959fbfc1",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1490,
              "fps": 25.0,
              "duration_seconds": 59.6
            },
            "right_wrist": {
              "path": "media/E05/E05_C__right_wrist.mp4",
              "sha256": "ee93f8654369ef9e1a49efd26bb6ecfbfc002a6ca5b42bdded94df82f8d97843",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1490,
              "fps": 25.0,
              "duration_seconds": 59.6
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            "multiview": {
              "path": "media/E05/E05_C__multiview.mp4",
              "sha256": "58ac428f125264f94092f16bbda077b82b207b9525d5ef637fdc45b16e83074f",
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              "fps": 25.0,
              "duration_seconds": 59.6
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          }
        }
      ]
    },
    {
      "id": "E06",
      "title": "蛋托孔位布局",
      "category": "孔位布局",
      "inference_prompt": "按示范的孔位布局，把三枚球放入六孔托盘。左右以你面对托盘的方向为准。",
      "evaluation_scope": "三球各占一孔；选中孔集合正确，不限定球颜色。",
      "scope_note": "实录三枚彩球代替鸡蛋；蛋托为3行2列，无明确方向标记。左右按示范操作者视角。迁移不得随机旋转无方向标记的对称蛋托再暗设近远。颜色顺序不是原布局规则。",
      "variants": [
        {
          "video_id": "E06-A",
          "variant": "A",
          "observed_demo": "填满左列三个孔",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E06/E06_A__head.mp4",
              "sha256": "959b965f9177cd5bad442d2b94f5b4c8d539cebba64e515876f5edaacab4eae2",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 708,
              "fps": 25.0,
              "duration_seconds": 28.32
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            "left_wrist": {
              "path": "media/E06/E06_A__left_wrist.mp4",
              "sha256": "85c0d9688fd2cc4cce18ffb430f3b8cab6577185b42312fd91571d528c297010",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 708,
              "fps": 25.0,
              "duration_seconds": 28.32
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            "right_wrist": {
              "path": "media/E06/E06_A__right_wrist.mp4",
              "sha256": "d0bcfd3e75eef256bd53c5a08ef7e7f3ca696fb8f7a226cc6d5da3a57966b36a",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 708,
              "fps": 25.0,
              "duration_seconds": 28.32
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            "multiview": {
              "path": "media/E06/E06_A__multiview.mp4",
              "sha256": "f1942361640c11447469d3978aac397ecc43a2dc4cf1debeb24dfdf92be4bd0a",
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              "fps": 25.0,
              "duration_seconds": 28.32
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          }
        },
        {
          "video_id": "E06-B",
          "variant": "B",
          "observed_demo": "填满右列三个孔",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E06/E06_B__head.mp4",
              "sha256": "7e031ce8e359b1b88766cfb94e3013557d204685550ef97cd2878b2cc6a80c60",
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              "width": 640,
              "height": 480,
              "frames": 741,
              "fps": 25.0,
              "duration_seconds": 29.64
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            "left_wrist": {
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 741,
              "fps": 25.0,
              "duration_seconds": 29.64
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            "right_wrist": {
              "path": "media/E06/E06_B__right_wrist.mp4",
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              "height": 480,
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              "duration_seconds": 29.64
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            "multiview": {
              "path": "media/E06/E06_B__multiview.mp4",
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              "duration_seconds": 29.64
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          }
        },
        {
          "video_id": "E06-C",
          "variant": "C",
          "observed_demo": "左列两端、右列中间各放一球",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E06/E06_C__head.mp4",
              "sha256": "17f73cdcd51337a530bd30e4a471f64ff2e844ef276c39b693ccf5c9d995104e",
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              "frames": 716,
              "fps": 25.0,
              "duration_seconds": 28.64
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            "left_wrist": {
              "path": "media/E06/E06_C__left_wrist.mp4",
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              "fps": 25.0,
              "duration_seconds": 28.64
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            "right_wrist": {
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            "multiview": {
              "path": "media/E06/E06_C__multiview.mp4",
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      ]
    },
    {
      "id": "E07",
      "title": "五块尺寸排序",
      "category": "尺寸排序",
      "inference_prompt": "按照示范中的尺寸排序，把五块积木沿远到近方向排成一列。",
      "evaluation_scope": "尺寸秩次正确、互不重叠、稳定释放；不指定颜色或绝对间距。",
      "scope_note": "1最小5最大；视频排列沿远近方向，非旧卡左右。C与现场括注(3,2,1,4,5)一致。",
      "variants": [
        {
          "video_id": "E07-A",
          "variant": "A",
          "observed_demo": "从远到近：最小、次小、中等、次大、最大",
          "status": "verified_prototype",
          "views": {
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              "fps": 25.0,
              "duration_seconds": 42.84
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            "left_wrist": {
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              "fps": 25.0,
              "duration_seconds": 42.84
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            "right_wrist": {
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              "duration_seconds": 42.84
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            "multiview": {
              "path": "media/E07/E07_A__multiview.mp4",
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          }
        },
        {
          "video_id": "E07-B",
          "variant": "B",
          "observed_demo": "从远到近：最大、次大、中等、次小、最小",
          "status": "verified_prototype",
          "views": {
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            "left_wrist": {
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              "frames": 1062,
              "fps": 25.0,
              "duration_seconds": 42.48
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            "right_wrist": {
              "path": "media/E07/E07_B__right_wrist.mp4",
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            "multiview": {
              "path": "media/E07/E07_B__multiview.mp4",
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          }
        },
        {
          "video_id": "E07-C",
          "variant": "C",
          "observed_demo": "从远到近：中等、次小、最小、次大、最大",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E07/E07_C__head.mp4",
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              "duration_seconds": 43.12
            },
            "left_wrist": {
              "path": "media/E07/E07_C__left_wrist.mp4",
              "sha256": "17c026428630197a424247778489917dd39e314cf991c7afa3af00d5531dbfc1",
              "bytes": 1191705,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1078,
              "fps": 25.0,
              "duration_seconds": 43.12
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            "right_wrist": {
              "path": "media/E07/E07_C__right_wrist.mp4",
              "sha256": "234a949177ad8c55d2da28b83177f5f14789c962602b4113681db9d0d74472db",
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              "width": 640,
              "height": 480,
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              "duration_seconds": 43.12
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            "multiview": {
              "path": "media/E07/E07_C__multiview.mp4",
              "sha256": "5e40dd36fdc7f06bfd4620f923b70802c689e8744bcbb0577f5e2b08ac129b0a",
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              "fps": 25.0,
              "duration_seconds": 43.12
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          }
        }
      ]
    },
    {
      "id": "E08",
      "title": "鞋盒内朝向摆放",
      "category": "朝向/参照",
      "inference_prompt": "按示范中鞋尖与鞋盒标签端的朝向关系，把两只鞋放入鞋盒。",
      "evaluation_scope": "两鞋在盒内；尖跟方向符合版本；允许合理侧倾。",
      "scope_note": "盒窄使一只鞋侧倾；不要沿用两鞋都平底朝下且完全不重叠的额外条件。保留鞋盒标签作可迁移参照。",
      "variants": [
        {
          "video_id": "E08-A",
          "variant": "A",
          "observed_demo": "两只鞋尖均朝鞋盒标签端",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E08/E08_A__head.mp4",
              "sha256": "ce761eb6ede7f34a3f5f8a7afe0b000026372acdde9f24b936e216185f703931",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 60.2
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            "left_wrist": {
              "path": "media/E08/E08_A__left_wrist.mp4",
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              "width": 640,
              "height": 480,
              "frames": 1505,
              "fps": 25.0,
              "duration_seconds": 60.2
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            "right_wrist": {
              "path": "media/E08/E08_A__right_wrist.mp4",
              "sha256": "286967440169ee58d544b3edf05bb86611919276555992bea4071a67da8b2bf9",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1505,
              "fps": 25.0,
              "duration_seconds": 60.2
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            "multiview": {
              "path": "media/E08/E08_A__multiview.mp4",
              "sha256": "90168054ad0eca61f79fc2c16081effac6af12379c5ccd581056f20ef44f5e00",
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              "width": 1440,
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              "fps": 25.0,
              "duration_seconds": 60.2
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          }
        },
        {
          "video_id": "E08-B",
          "variant": "B",
          "observed_demo": "两只鞋跟均朝标签端",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E08/E08_B__head.mp4",
              "sha256": "eb04bdc13ddcb53f20d2d0f55befe3a40c5f62d5edadceec4c7e2af21210d72b",
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              "width": 640,
              "height": 480,
              "frames": 1001,
              "fps": 25.0,
              "duration_seconds": 40.04
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            "left_wrist": {
              "path": "media/E08/E08_B__left_wrist.mp4",
              "sha256": "4cef8ce42a7e1ace27a311d00b4bcc365a5ef2cb75a3175eb99ffd1757558980",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1001,
              "fps": 25.0,
              "duration_seconds": 40.04
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            "right_wrist": {
              "path": "media/E08/E08_B__right_wrist.mp4",
              "sha256": "a3288ad27819933d5f32fb37882c5b062bae28947cd6dcc8b61e805a7549c9a7",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1001,
              "fps": 25.0,
              "duration_seconds": 40.04
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            "multiview": {
              "path": "media/E08/E08_B__multiview.mp4",
              "sha256": "0add4fe472d5158085a5fe347be469fab1dadf3b22c496932fb38456c224109c",
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              "duration_seconds": 40.04
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          }
        },
        {
          "video_id": "E08-C",
          "variant": "C",
          "observed_demo": "左脚鞋尖朝标签端，右脚鞋跟朝标签端",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E08/E08_C__head.mp4",
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              "width": 640,
              "height": 480,
              "frames": 1235,
              "fps": 25.0,
              "duration_seconds": 49.4
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            "left_wrist": {
              "path": "media/E08/E08_C__left_wrist.mp4",
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              "width": 640,
              "height": 480,
              "frames": 1235,
              "fps": 25.0,
              "duration_seconds": 49.4
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            "right_wrist": {
              "path": "media/E08/E08_C__right_wrist.mp4",
              "sha256": "27d86e5fb52cf37521865d3a521454d9328976b39abd99db5303ec00c081b572",
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              "fps": 25.0,
              "duration_seconds": 49.4
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            "multiview": {
              "path": "media/E08/E08_C__multiview.mp4",
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              "fps": 25.0,
              "duration_seconds": 49.4
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          }
        }
      ]
    },
    {
      "id": "E09",
      "title": "九件交叉属性分组",
      "category": "交叉属性分组",
      "inference_prompt": "按示范的颜色与形状分组关系，将九件物体分成三组，每组三件。",
      "evaluation_scope": "比较组成员集合，允许三块无标签分区互换。",
      "scope_note": "无可辨编号的白纸分区，按组内成员评分，勿暗设纸区编号；C为明确三组映射。",
      "variants": [
        {
          "video_id": "E09-A",
          "variant": "A",
          "observed_demo": "同色一组：红、绿、蓝各三件",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E09/E09_A__head.mp4",
              "sha256": "42d823ce4add74483a181e4b8a425629c6e3ba27f29034115ad5e9bee796a362",
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              "width": 640,
              "height": 480,
              "frames": 3350,
              "fps": 25.0,
              "duration_seconds": 134.0
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            "left_wrist": {
              "path": "media/E09/E09_A__left_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 3350,
              "fps": 25.0,
              "duration_seconds": 134.0
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            "right_wrist": {
              "path": "media/E09/E09_A__right_wrist.mp4",
              "sha256": "1106a868bc42b8c172d79057f734cbd9590cf5c6023bc1a5a4fdc0bb01da0765",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 3350,
              "fps": 25.0,
              "duration_seconds": 134.0
            },
            "multiview": {
              "path": "media/E09/E09_A__multiview.mp4",
              "sha256": "f74249364046451c05a7c2590d43a0cbfb685c740629054649a23ba518822add",
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              "width": 1440,
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              "fps": 25.0,
              "duration_seconds": 134.0
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          }
        },
        {
          "video_id": "E09-B",
          "variant": "B",
          "observed_demo": "同形一组：方、三角、圆各三件",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E09/E09_B__head.mp4",
              "sha256": "9e623d2931f0431555bf1567a8056d3525179e6188a5307e85da425b6b3131c3",
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              "duration_seconds": 140.56
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            "left_wrist": {
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              "width": 640,
              "height": 480,
              "frames": 3514,
              "fps": 25.0,
              "duration_seconds": 140.56
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            "right_wrist": {
              "path": "media/E09/E09_B__right_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 3514,
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              "duration_seconds": 140.56
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            "multiview": {
              "path": "media/E09/E09_B__multiview.mp4",
              "sha256": "dd2cd94c21dced613e66e5b4d9e77de45ef063777610dc6d170a44f3d99c364a",
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              "fps": 25.0,
              "duration_seconds": 140.56
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          }
        },
        {
          "video_id": "E09-C",
          "variant": "C",
          "observed_demo": "红圆+绿三角+蓝方；红三角+绿方+蓝圆；红方+绿圆+蓝三角",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E09/E09_C__head.mp4",
              "sha256": "3270c725549120d982308bbebf9c5d998e7329be27e1d3a073619ea44326c20e",
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              "width": 640,
              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 137.24
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            "left_wrist": {
              "path": "media/E09/E09_C__left_wrist.mp4",
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              "width": 640,
              "height": 480,
              "frames": 3431,
              "fps": 25.0,
              "duration_seconds": 137.24
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            "right_wrist": {
              "path": "media/E09/E09_C__right_wrist.mp4",
              "sha256": "500da0242f9ca4b82fa458287fa33118d13fa7196e162209014871bcc3a5314e",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 137.24
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            "multiview": {
              "path": "media/E09/E09_C__multiview.mp4",
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              "duration_seconds": 137.24
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          }
        }
      ]
    },
    {
      "id": "E10",
      "title": "按属性选择并套柱",
      "category": "属性选择/套柱",
      "inference_prompt": "按示范的颜色、形状选择方式，把符合条件的零件套到匹配的立柱上，其余留在桌上。",
      "evaluation_scope": "选件集合正确；所选件真实穿柱并释放；未选件不套入。",
      "scope_note": "C是并集OR，不是同时红且方AND。实物孔在零件上，木板是立柱，不是零件插进孔板。",
      "variants": [
        {
          "video_id": "E10-A",
          "variant": "A",
          "observed_demo": "套入所有红色件，共3件",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E10/E10_A__head.mp4",
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              "width": 640,
              "height": 480,
              "frames": 2250,
              "fps": 25.0,
              "duration_seconds": 90.0
            },
            "left_wrist": {
              "path": "media/E10/E10_A__left_wrist.mp4",
              "sha256": "9715ee218f80d9d0fef11c780616c159b4c379e82aeee2af27cab22673e524ac",
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              "width": 640,
              "height": 480,
              "frames": 2250,
              "fps": 25.0,
              "duration_seconds": 90.0
            },
            "right_wrist": {
              "path": "media/E10/E10_A__right_wrist.mp4",
              "sha256": "4a0290be768ad9cfeb87e99e23cd4e379c770eb7c517cd5abd47a4e771abf666",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2250,
              "fps": 25.0,
              "duration_seconds": 90.0
            },
            "multiview": {
              "path": "media/E10/E10_A__multiview.mp4",
              "sha256": "ddd98f7bad61f666a918559a103a647cff106721b69e8ea5f39eab7165249724",
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              "fps": 25.0,
              "duration_seconds": 90.0
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          }
        },
        {
          "video_id": "E10-B",
          "variant": "B",
          "observed_demo": "套入所有方形件，共3件",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E10/E10_B__head.mp4",
              "sha256": "c6c5890f78bbaff92df205bbf77c7e32da3559c194bb37a8cf82554bd1f296b8",
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              "duration_seconds": 68.8
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            "left_wrist": {
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              "width": 640,
              "height": 480,
              "frames": 1720,
              "fps": 25.0,
              "duration_seconds": 68.8
            },
            "right_wrist": {
              "path": "media/E10/E10_B__right_wrist.mp4",
              "sha256": "8243fd7c271932bcf2e580ec30375683d99c8ae2806f093f3dda77f95ef64383",
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              "width": 640,
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              "fps": 25.0,
              "duration_seconds": 68.8
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            "multiview": {
              "path": "media/E10/E10_B__multiview.mp4",
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              "duration_seconds": 68.8
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          }
        },
        {
          "video_id": "E10-C",
          "variant": "C",
          "observed_demo": "套入红色件或方形件，共5件；红方只处理一次",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E10/E10_C__head.mp4",
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              "fps": 25.0,
              "duration_seconds": 126.36
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            "left_wrist": {
              "path": "media/E10/E10_C__left_wrist.mp4",
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              "width": 640,
              "height": 480,
              "frames": 3159,
              "fps": 25.0,
              "duration_seconds": 126.36
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            "right_wrist": {
              "path": "media/E10/E10_C__right_wrist.mp4",
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              "duration_seconds": 126.36
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          }
        }
      ]
    },
    {
      "id": "E11",
      "title": "四格布局变换入框",
      "category": "空间变换",
      "inference_prompt": "按示范中的平面布局变换，将开局的四块积木搬入四格框。",
      "evaluation_scope": "保存初始2×2布局，按恒等/顺时针90°/左右镜像检查目标。",
      "scope_note": "参考就是待移动物件的初始布局；没有独立且始终留存的参考拼板。评测须保存初态，允许记忆。",
      "variants": [
        {
          "video_id": "E11-A",
          "variant": "A",
          "observed_demo": "保留初始2×2布局搬入四格框",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E11/E11_A__head.mp4",
              "sha256": "1724fbe3d649052f97a72995a8b7140a1e3d36fb178f348850d18ee4ac09a2b0",
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              "fps": 25.0,
              "duration_seconds": 85.28
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            "left_wrist": {
              "path": "media/E11/E11_A__left_wrist.mp4",
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              "fps": 25.0,
              "duration_seconds": 85.28
            },
            "right_wrist": {
              "path": "media/E11/E11_A__right_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2132,
              "fps": 25.0,
              "duration_seconds": 85.28
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            "multiview": {
              "path": "media/E11/E11_A__multiview.mp4",
              "sha256": "8ff7eb803b526def8333605186edd656e3850ae786dc5b4de15061b5e5fa750f",
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              "fps": 25.0,
              "duration_seconds": 85.28
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          }
        },
        {
          "video_id": "E11-B",
          "variant": "B",
          "observed_demo": "初始布局顺时针旋转90°后入框",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E11/E11_B__head.mp4",
              "sha256": "2af8524ab279dc98211390618e8122d7d96e77b0e7ce5dd8473512e10f8a6abf",
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              "duration_seconds": 72.52
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            "left_wrist": {
              "path": "media/E11/E11_B__left_wrist.mp4",
              "sha256": "0de3ec218a14cc18b4c9094e2246ec150782818df037dac40f659481129bda04",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1813,
              "fps": 25.0,
              "duration_seconds": 72.52
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            "right_wrist": {
              "path": "media/E11/E11_B__right_wrist.mp4",
              "sha256": "33580c5b408075f9d2cc35dd0c60612c33e234a103c8e64b4aaf4980716caaec",
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              "width": 640,
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              "duration_seconds": 72.52
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            "multiview": {
              "path": "media/E11/E11_B__multiview.mp4",
              "sha256": "d17eb9fb47a497801f8f20cd9e553bc057b821c428b9ba2193ac93c0eb1ff9b5",
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              "width": 1440,
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              "frames": 1813,
              "fps": 25.0,
              "duration_seconds": 72.52
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          }
        },
        {
          "video_id": "E11-C",
          "variant": "C",
          "observed_demo": "初始布局左右镜像后入框",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E11/E11_C__head.mp4",
              "sha256": "72585b2228be1c632dba2f028a14f1aff854d691b21af60fd8d2af5f1ebf79c3",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2157,
              "fps": 25.0,
              "duration_seconds": 86.28
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            "left_wrist": {
              "path": "media/E11/E11_C__left_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2157,
              "fps": 25.0,
              "duration_seconds": 86.28
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            "right_wrist": {
              "path": "media/E11/E11_C__right_wrist.mp4",
              "sha256": "68ee34add8936755171960d31ad0e75492f0d64e21dd1b33b671a235f34ec02f",
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              "width": 640,
              "height": 480,
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            "multiview": {
              "path": "media/E11/E11_C__multiview.mp4",
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              "fps": 25.0,
              "duration_seconds": 86.28
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          }
        }
      ]
    },
    {
      "id": "E12",
      "title": "插排孔位选择",
      "category": "插位选择",
      "inference_prompt": "按示范相对于电线端的插位选择，将两个充电器插入四位插排。",
      "evaluation_scope": "两个插位占用集合正确；不限制大小充电器分别占哪一位。",
      "scope_note": "插位沿电线端向另一端编号1–4。实录两个白充电器，改变插位而非三色充电器三选一。各片小充电器都在选中两位的靠电线一侧；若只考占用布局不额外限制身份。",
      "variants": [
        {
          "video_id": "E12-A",
          "variant": "A",
          "observed_demo": "两充电器插入靠电线端的两个插位",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E12/E12_A__head.mp4",
              "sha256": "28163a42677cc55d2f782e204179c22c53963dd6fd6dd8779e371585688d74b3",
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              "width": 640,
              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 71.8
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            "left_wrist": {
              "path": "media/E12/E12_A__left_wrist.mp4",
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              "height": 480,
              "frames": 1795,
              "fps": 25.0,
              "duration_seconds": 71.8
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            "right_wrist": {
              "path": "media/E12/E12_A__right_wrist.mp4",
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            "multiview": {
              "path": "media/E12/E12_A__multiview.mp4",
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              "duration_seconds": 71.8
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          }
        },
        {
          "video_id": "E12-B",
          "variant": "B",
          "observed_demo": "插入远离电线端的两个插位",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E12/E12_B__head.mp4",
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            "left_wrist": {
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              "fps": 25.0,
              "duration_seconds": 69.4
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            "right_wrist": {
              "path": "media/E12/E12_B__right_wrist.mp4",
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            "multiview": {
              "path": "media/E12/E12_B__multiview.mp4",
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              "duration_seconds": 69.4
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          }
        },
        {
          "video_id": "E12-C",
          "variant": "C",
          "observed_demo": "插入两端插位，中间两个空着",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E12/E12_C__head.mp4",
              "sha256": "273c1271729ff15a24c98abd7d740d8ff3ff2bf4801e4cfe47c0b9807cea36b0",
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            "left_wrist": {
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            "right_wrist": {
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          }
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      ]
    },
    {
      "id": "E13",
      "title": "手机支架姿态",
      "category": "姿态/插放",
      "inference_prompt": "按示范的手机朝向，把手机放稳在支架上；以支架开口侧判断左右。",
      "evaluation_scope": "背面朝操作者，摄像头端朝向正确，受支架支持。",
      "scope_note": "三片均手机背面朝操作者，不能写屏幕朝向操作者。用后摄模组辨认机身顶端；左右为支架开口观看侧。",
      "variants": [
        {
          "video_id": "E13-A",
          "variant": "A",
          "observed_demo": "竖放，后摄像头端朝上",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E13/E13_A__head.mp4",
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              "width": 640,
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              "frames": 1321,
              "fps": 25.0,
              "duration_seconds": 52.84
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            "left_wrist": {
              "path": "media/E13/E13_A__left_wrist.mp4",
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              "fps": 25.0,
              "duration_seconds": 52.84
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            "right_wrist": {
              "path": "media/E13/E13_A__right_wrist.mp4",
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              "duration_seconds": 52.84
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            "multiview": {
              "path": "media/E13/E13_A__multiview.mp4",
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              "duration_seconds": 52.84
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          }
        },
        {
          "video_id": "E13-B",
          "variant": "B",
          "observed_demo": "横放，后摄像头端朝右",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E13/E13_B__head.mp4",
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            "left_wrist": {
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            "multiview": {
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          }
        },
        {
          "video_id": "E13-C",
          "variant": "C",
          "observed_demo": "横放，后摄像头端朝左",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E13/E13_C__head.mp4",
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              "duration_seconds": 52.28
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            "left_wrist": {
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              "duration_seconds": 52.28
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            "right_wrist": {
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            "multiview": {
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          }
        }
      ]
    },
    {
      "id": "E14",
      "title": "拆塔与层序重排",
      "category": "层序变换",
      "inference_prompt": "按示范中对塔层序的调整方式，重新搭好这座四层积木塔。",
      "evaluation_scope": "相对初始层序检查顶1/2交换、顶2/3交换或全反转。",
      "scope_note": "实物4层，全数重排，没有抽出指定层单独交付；从顶端计层。",
      "variants": [
        {
          "video_id": "E14-A",
          "variant": "A",
          "observed_demo": "交换从顶端数第1、2层，其余不变",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E14/E14_A__head.mp4",
              "sha256": "3efced55affaa60e6b0d9c4db903645780343e2015d9dfb35065c2898956b787",
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              "duration_seconds": 73.16
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            "left_wrist": {
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              "duration_seconds": 73.16
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            "right_wrist": {
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            "multiview": {
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          }
        },
        {
          "video_id": "E14-B",
          "variant": "B",
          "observed_demo": "交换从顶端数第2、3层，其余不变",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E14/E14_B__head.mp4",
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              "duration_seconds": 73.16
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            "right_wrist": {
              "path": "media/E14/E14_B__right_wrist.mp4",
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            "multiview": {
              "path": "media/E14/E14_B__multiview.mp4",
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          }
        },
        {
          "video_id": "E14-C",
          "variant": "C",
          "observed_demo": "整塔层序上下反转",
          "status": "verified_prototype",
          "views": {
            "head": {
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              "width": 640,
              "height": 480,
              "frames": 1880,
              "fps": 25.0,
              "duration_seconds": 75.2
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            "left_wrist": {
              "path": "media/E14/E14_C__left_wrist.mp4",
              "sha256": "e1e3ea1783c23c137ee337d9d1bc91347ea153f2ed126898d9ca912af7dc236c",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1880,
              "fps": 25.0,
              "duration_seconds": 75.2
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            "right_wrist": {
              "path": "media/E14/E14_C__right_wrist.mp4",
              "sha256": "ceb126058c287e369eed48573719a373d963c506717a73f917908982f66979b9",
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              "duration_seconds": 75.2
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            "multiview": {
              "path": "media/E14/E14_C__multiview.mp4",
              "sha256": "6b8691f4b8475f34b690aab5a04f2b9ae07ca57eba65b2a022f96d330a18169f",
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              "fps": 25.0,
              "duration_seconds": 75.2
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          }
        }
      ]
    },
    {
      "id": "E15",
      "title": "T形块属性交换",
      "category": "位置/朝向交换",
      "inference_prompt": "按照示范中位置与朝向的交换方式，调整这两个T形块。",
      "evaluation_scope": "逐物比较初始位置和方向；允许暂存与任意操作次序。",
      "scope_note": "允许暂存和任意合法路径；终态相对初态逐物检查。",
      "variants": [
        {
          "video_id": "E15-A",
          "variant": "A",
          "observed_demo": "交换位置，各自朝向不变",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E15/E15_A__head.mp4",
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              "width": 640,
              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 43.96
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            "left_wrist": {
              "path": "media/E15/E15_A__left_wrist.mp4",
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              "width": 640,
              "height": 480,
              "frames": 1099,
              "fps": 25.0,
              "duration_seconds": 43.96
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            "right_wrist": {
              "path": "media/E15/E15_A__right_wrist.mp4",
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              "height": 480,
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              "fps": 25.0,
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            "multiview": {
              "path": "media/E15/E15_A__multiview.mp4",
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              "fps": 25.0,
              "duration_seconds": 43.96
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          }
        },
        {
          "video_id": "E15-B",
          "variant": "B",
          "observed_demo": "各自位置不变，只交换朝向",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E15/E15_B__head.mp4",
              "sha256": "7186207861afa24ac28ceca5377d3dd2013095dc3b42ce4365f60b61e68c5e2c",
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              "width": 640,
              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 31.96
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            "left_wrist": {
              "path": "media/E15/E15_B__left_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 799,
              "fps": 25.0,
              "duration_seconds": 31.96
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            "right_wrist": {
              "path": "media/E15/E15_B__right_wrist.mp4",
              "sha256": "cc45419184b6b90e0251c380bb6c6663e072ee2f654fcacc8a225a277a452ee5",
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              "width": 640,
              "height": 480,
              "frames": 799,
              "fps": 25.0,
              "duration_seconds": 31.96
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            "multiview": {
              "path": "media/E15/E15_B__multiview.mp4",
              "sha256": "58a0f9a44f0cd08c99d7435ac00da6f941dd8e61453687e850e16ae0b0226830",
              "bytes": 2022010,
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              "width": 1440,
              "height": 720,
              "frames": 799,
              "fps": 25.0,
              "duration_seconds": 31.96
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          }
        },
        {
          "video_id": "E15-C",
          "variant": "C",
          "observed_demo": "位置与朝向都交换",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E15/E15_C__head.mp4",
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              "width": 640,
              "height": 480,
              "frames": 1359,
              "fps": 25.0,
              "duration_seconds": 54.36
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            "left_wrist": {
              "path": "media/E15/E15_C__left_wrist.mp4",
              "sha256": "9aa9e1f6fdbc558da49c6e4cff682ca7bed29005c7d8d2e64280f98383abd051",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1359,
              "fps": 25.0,
              "duration_seconds": 54.36
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            "right_wrist": {
              "path": "media/E15/E15_C__right_wrist.mp4",
              "sha256": "d9e25baef999a0dd646e99628340bad49d7b5562f11020f5b70404fe2cbe7266",
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              "width": 640,
              "height": 480,
              "frames": 1359,
              "fps": 25.0,
              "duration_seconds": 54.36
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            "multiview": {
              "path": "media/E15/E15_C__multiview.mp4",
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              "fps": 25.0,
              "duration_seconds": 54.36
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          }
        }
      ]
    },
    {
      "id": "E16",
      "title": "三件布局搬入托盘",
      "category": "布局/独立朝向",
      "inference_prompt": "按示范的布局与单件朝向变换，把三件T形块搬进托盘。",
      "evaluation_scope": "A保持；B位置保持且每件逆时针90°；C上下镜像且朝向保持。",
      "scope_note": "B不是整组旋转，C不是左右镜像。无独立参照板。对应原F20的意图需以实际操作重述。",
      "variants": [
        {
          "video_id": "E16-A",
          "variant": "A",
          "observed_demo": "保留三件的相对位置与朝向搬入托盘",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E16/E16_A__head.mp4",
              "sha256": "771b253546caabd43a53d8c3757b0ac466dc6d9cc8f40a6e3d5eabff82485000",
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              "width": 640,
              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 51.08
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            "left_wrist": {
              "path": "media/E16/E16_A__left_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1277,
              "fps": 25.0,
              "duration_seconds": 51.08
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            "right_wrist": {
              "path": "media/E16/E16_A__right_wrist.mp4",
              "sha256": "95f5952813ac894559e330c8a792a7178462e736c3349374bfb52b0109ecc764",
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              "width": 640,
              "height": 480,
              "frames": 1277,
              "fps": 25.0,
              "duration_seconds": 51.08
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            "multiview": {
              "path": "media/E16/E16_A__multiview.mp4",
              "sha256": "e74115116780c985d8d95f55c06cd0d8181b7624da1781f8b4f865cc236301e7",
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              "fps": 25.0,
              "duration_seconds": 51.08
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          }
        },
        {
          "video_id": "E16-B",
          "variant": "B",
          "observed_demo": "相对位置不变，每件原地逆时针转90°后搬入",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E16/E16_B__head.mp4",
              "sha256": "38b10ddf5683f474fbc8d6c80892f65755bad4e66314964dad89d7124e5b1c73",
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              "duration_seconds": 110.44
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            "left_wrist": {
              "path": "media/E16/E16_B__left_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
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              "fps": 25.0,
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            "right_wrist": {
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              "fps": 25.0,
              "duration_seconds": 110.44
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            "multiview": {
              "path": "media/E16/E16_B__multiview.mp4",
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              "fps": 25.0,
              "duration_seconds": 110.44
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          }
        },
        {
          "video_id": "E16-C",
          "variant": "C",
          "observed_demo": "相对位置上下镜像、各件朝向不变后搬入",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E16/E16_C__head.mp4",
              "sha256": "69e91623c3112600fbfd9f989af5ebc77dd21c86e0678927645762dadb375c5b",
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              "duration_seconds": 51.84
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            "left_wrist": {
              "path": "media/E16/E16_C__left_wrist.mp4",
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              "width": 640,
              "height": 480,
              "frames": 1296,
              "fps": 25.0,
              "duration_seconds": 51.84
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            "right_wrist": {
              "path": "media/E16/E16_C__right_wrist.mp4",
              "sha256": "9678509f4c83286ded4794dbff6d3063ccfd560ef97f44a9a922170242432ee5",
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              "fps": 25.0,
              "duration_seconds": 51.84
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            "multiview": {
              "path": "media/E16/E16_C__multiview.mp4",
              "sha256": "02506bbe87fa19ef86b3c6414421bc58e133ba67cd34665e47f4910554651961",
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              "duration_seconds": 51.84
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          }
        }
      ]
    },
    {
      "id": "E17",
      "title": "双层点心架分层收纳",
      "category": "分类/分层",
      "inference_prompt": "按照示范的分层收纳方式，把四件物体放到点心架上。",
      "evaluation_scope": "颜色/形状/全部上层对应正确；释放后受正确层支撑。",
      "scope_note": "实录为固定双层架，不涉及移开上托盘、取出下层目标和恢复结构。",
      "variants": [
        {
          "video_id": "E17-A",
          "variant": "A",
          "observed_demo": "蓝色放上层，绿色放下层",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E17/E17_A__head.mp4",
              "sha256": "c039e11f028043d26036c7fdb442fb2539f434c8d5ad778a24ece223cd999273",
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              "width": 640,
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              "frames": 3195,
              "fps": 25.0,
              "duration_seconds": 127.8
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            "left_wrist": {
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              "width": 640,
              "height": 480,
              "frames": 3195,
              "fps": 25.0,
              "duration_seconds": 127.8
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            "right_wrist": {
              "path": "media/E17/E17_A__right_wrist.mp4",
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              "width": 640,
              "height": 480,
              "frames": 3195,
              "fps": 25.0,
              "duration_seconds": 127.8
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            "multiview": {
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              "fps": 25.0,
              "duration_seconds": 127.8
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          }
        },
        {
          "video_id": "E17-B",
          "variant": "B",
          "observed_demo": "三角放上层，方形放下层",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E17/E17_B__head.mp4",
              "sha256": "7bc3e4fb424e0d51b9e5713e404138589812a926833968436921bfee89124e21",
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              "duration_seconds": 149.28
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            "left_wrist": {
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              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 149.28
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            "right_wrist": {
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              "sha256": "76ed19ad9162e432043050ad6e083252183acee33871f9f27f0fd69ec754a20d",
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              "width": 640,
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              "fps": 25.0,
              "duration_seconds": 149.28
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            "multiview": {
              "path": "media/E17/E17_B__multiview.mp4",
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              "duration_seconds": 149.28
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          }
        },
        {
          "video_id": "E17-C",
          "variant": "C",
          "observed_demo": "四件全部放上层",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E17/E17_C__head.mp4",
              "sha256": "98e3694a33e6e67691f11a477037f394dc63f75ab9b310f7b7380ab2a733ac03",
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              "fps": 25.0,
              "duration_seconds": 124.56
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            "left_wrist": {
              "path": "media/E17/E17_C__left_wrist.mp4",
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              "height": 480,
              "frames": 3114,
              "fps": 25.0,
              "duration_seconds": 124.56
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            "right_wrist": {
              "path": "media/E17/E17_C__right_wrist.mp4",
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            "multiview": {
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          }
        }
      ]
    },
    {
      "id": "E18",
      "title": "抽屉取球并关回",
      "category": "选择/抽屉恢复",
      "inference_prompt": "按示范选择同色的球，取出放到白色垫上，并关好抽屉。",
      "evaluation_scope": "指定球交付、其他球留抽屉、抽屉关闭。",
      "scope_note": "均打开蓝色左抽屉，其他球留在其中；抽屉颜色不是取球规则。",
      "variants": [
        {
          "video_id": "E18-A",
          "variant": "A",
          "observed_demo": "取出红球放到白色目标纸上，关回抽屉",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E18/E18_A__head.mp4",
              "sha256": "261ad6abe9ab630bb78f60050e179fc033e6859cb7873f2ec8c1404e0c1a0ca8",
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              "fps": 25.0,
              "duration_seconds": 36.44
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            "left_wrist": {
              "path": "media/E18/E18_A__left_wrist.mp4",
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              "duration_seconds": 36.44
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            "right_wrist": {
              "path": "media/E18/E18_A__right_wrist.mp4",
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              "width": 640,
              "height": 480,
              "frames": 911,
              "fps": 25.0,
              "duration_seconds": 36.44
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            "multiview": {
              "path": "media/E18/E18_A__multiview.mp4",
              "sha256": "1b366e2bec53426f944805892788b7d6738a05dc142355392e6bd30eb48afe13",
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              "duration_seconds": 36.44
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          }
        },
        {
          "video_id": "E18-B",
          "variant": "B",
          "observed_demo": "取出绿球放到白色目标纸上，关回抽屉",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E18/E18_B__head.mp4",
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              "duration_seconds": 45.36
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            "left_wrist": {
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1134,
              "fps": 25.0,
              "duration_seconds": 45.36
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            "right_wrist": {
              "path": "media/E18/E18_B__right_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1134,
              "fps": 25.0,
              "duration_seconds": 45.36
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              "fps": 25.0,
              "duration_seconds": 45.36
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          }
        },
        {
          "video_id": "E18-C",
          "variant": "C",
          "observed_demo": "取出蓝球放到白色目标纸上，关回抽屉",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E18/E18_C__head.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1127,
              "fps": 25.0,
              "duration_seconds": 45.08
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            "left_wrist": {
              "path": "media/E18/E18_C__left_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1127,
              "fps": 25.0,
              "duration_seconds": 45.08
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            "right_wrist": {
              "path": "media/E18/E18_C__right_wrist.mp4",
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              "width": 640,
              "height": 480,
              "frames": 1127,
              "fps": 25.0,
              "duration_seconds": 45.08
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              "path": "media/E18/E18_C__multiview.mp4",
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              "fps": 25.0,
              "duration_seconds": 45.08
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          }
        }
      ]
    },
    {
      "id": "E19",
      "title": "饮料瓶与瓶盖配对",
      "category": "瓶型→盖色",
      "inference_prompt": "按示范中瓶型与瓶盖颜色的对应关系，为三瓶饮料配好盖。",
      "evaluation_scope": "三瓶各有正确色盖，稳定覆盖瓶口；不要求旋紧。",
      "scope_note": "真实瓶盖颜色为黄白红，不是题单部分段落写的红绿白；动作是放盖/按盖，未见明确旋紧过程，不以旋紧作为判定。",
      "variants": [
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          "video_id": "E19-A",
          "variant": "A",
          "observed_demo": "雪碧配黄盖，水配白盖，可乐配红盖",
          "status": "verified_prototype",
          "views": {
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              "width": 640,
              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 53.4
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            "left_wrist": {
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              "width": 640,
              "height": 480,
              "frames": 1335,
              "fps": 25.0,
              "duration_seconds": 53.4
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            "right_wrist": {
              "path": "media/E19/E19_A__right_wrist.mp4",
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            "multiview": {
              "path": "media/E19/E19_A__multiview.mp4",
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              "duration_seconds": 53.4
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          }
        },
        {
          "video_id": "E19-B",
          "variant": "B",
          "observed_demo": "雪碧配红盖，水配黄盖，可乐配白盖",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E19/E19_B__head.mp4",
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              "width": 640,
              "height": 480,
              "frames": 1449,
              "fps": 25.0,
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            "right_wrist": {
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            "multiview": {
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          }
        },
        {
          "video_id": "E19-C",
          "variant": "C",
          "observed_demo": "雪碧配白盖，水配红盖，可乐配黄盖",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E19/E19_C__head.mp4",
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              "width": 640,
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              "duration_seconds": 67.48
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            "left_wrist": {
              "path": "media/E19/E19_C__left_wrist.mp4",
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              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 67.48
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            "right_wrist": {
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          }
        }
      ]
    },
    {
      "id": "E20",
      "title": "按颜色补齐指定数量",
      "category": "颜色/补齐数量",
      "inference_prompt": "按照示范中的配色与补齐后的数量，将各标记区域的筹码补齐。",
      "evaluation_scope": "每区颜色纯且总数达标；不能把目标数理解为新增数。",
      "scope_note": "初始黄蓝各1、红0，演示的是补到总数，不是每处额外加同样数量。剩余筹码不动。",
      "variants": [
        {
          "video_id": "E20-A",
          "variant": "A",
          "observed_demo": "圆标记黄片、方标记红片、三角标记蓝片，各补到2片",
          "status": "verified_prototype",
          "views": {
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              "fps": 25.0,
              "duration_seconds": 66.6
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            "left_wrist": {
              "path": "media/E20/E20_A__left_wrist.mp4",
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              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 66.6
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            "right_wrist": {
              "path": "media/E20/E20_A__right_wrist.mp4",
              "sha256": "778801de402179130ad7dbf8a623c4eb33e225371f0f1a3c1f996d8cfcae8d2d",
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              "duration_seconds": 66.6
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            "multiview": {
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              "duration_seconds": 66.6
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          }
        },
        {
          "video_id": "E20-B",
          "variant": "B",
          "observed_demo": "同样配色，各补到3片",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E20/E20_B__head.mp4",
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              "duration_seconds": 105.08
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            "left_wrist": {
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              "height": 480,
              "frames": 2627,
              "fps": 25.0,
              "duration_seconds": 105.08
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            "right_wrist": {
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              "fps": 25.0,
              "duration_seconds": 105.08
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            "multiview": {
              "path": "media/E20/E20_B__multiview.mp4",
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              "duration_seconds": 105.08
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          }
        },
        {
          "video_id": "E20-C",
          "variant": "C",
          "observed_demo": "同样配色，各补到4片",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E20/E20_C__head.mp4",
              "sha256": "68648f974c414e46de0e3e427ddaed292d78f01522192a2874f9b0b1260bca34",
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              "duration_seconds": 147.08
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            "left_wrist": {
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              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 147.08
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            "right_wrist": {
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              "duration_seconds": 147.08
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            "multiview": {
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              "duration_seconds": 147.08
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          }
        }
      ]
    },
    {
      "id": "E21",
      "title": "按颜色顺序装四格盘",
      "category": "颜色时序/格位",
      "inference_prompt": "按示范的颜色先后顺序，依次将四块积木装进四格盘。",
      "evaluation_scope": "四次首次放入事件与行优先格位都正确。",
      "scope_note": "实录同时可见时间顺序和最终格位；题单以顺序规则定义，应记录释放事件序列，不能只判四物均在盘里。",
      "variants": [
        {
          "video_id": "E21-A",
          "variant": "A",
          "observed_demo": "按红、黄、蓝、绿顺序放入左上、右上、左下、右下",
          "status": "verified_prototype",
          "views": {
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            "left_wrist": {
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              "fps": 25.0,
              "duration_seconds": 83.16
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            "right_wrist": {
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          }
        },
        {
          "video_id": "E21-B",
          "variant": "B",
          "observed_demo": "按红、绿、蓝、黄顺序放入这四格",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E21/E21_B__head.mp4",
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              "frames": 1920,
              "fps": 25.0,
              "duration_seconds": 76.8
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              "duration_seconds": 76.8
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          }
        },
        {
          "video_id": "E21-C",
          "variant": "C",
          "observed_demo": "按绿、蓝、黄、红顺序放入这四格",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E21/E21_C__head.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1756,
              "fps": 25.0,
              "duration_seconds": 70.24
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            "left_wrist": {
              "path": "media/E21/E21_C__left_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1756,
              "fps": 25.0,
              "duration_seconds": 70.24
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            "right_wrist": {
              "path": "media/E21/E21_C__right_wrist.mp4",
              "sha256": "e288266064b6323f0e5e088f13777400f698903d98c1738d41ac2956d1202d3f",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1756,
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              "duration_seconds": 70.24
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            "multiview": {
              "path": "media/E21/E21_C__multiview.mp4",
              "sha256": "84723374f2c0845e405d429f03b62bf4cfc24554f150a0b574632abcf2951227",
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              "frames": 1756,
              "fps": 25.0,
              "duration_seconds": 70.24
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          }
        }
      ]
    },
    {
      "id": "E22",
      "title": "围绕玩具车摆放色块",
      "category": "物体坐标关系",
      "inference_prompt": "按示范中颜色与车前、车左、车右的对应关系，将三块积木摆到玩具车周围。",
      "evaluation_scope": "用可辨车头的局部坐标判断三侧；不以相机坐标代替。",
      "scope_note": "原始分辨率放大可见车尾翼在画面左、车头在右；以车体为参照定义前左右，仿真车也须有清楚车头。三片车向相同，旋转迁移能力仍需另测。",
      "variants": [
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          "video_id": "E22-A",
          "variant": "A",
          "observed_demo": "车前红、车左绿、车右蓝",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E22/E22_A__head.mp4",
              "sha256": "694e147d4ff4462b421166d3eea381a653bd7af4dc2fa8af0251d1deb71737f1",
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              "width": 640,
              "height": 480,
              "frames": 1516,
              "fps": 25.0,
              "duration_seconds": 60.64
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            "left_wrist": {
              "path": "media/E22/E22_A__left_wrist.mp4",
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              "width": 640,
              "height": 480,
              "frames": 1516,
              "fps": 25.0,
              "duration_seconds": 60.64
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            "right_wrist": {
              "path": "media/E22/E22_A__right_wrist.mp4",
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              "width": 640,
              "height": 480,
              "frames": 1516,
              "fps": 25.0,
              "duration_seconds": 60.64
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            "multiview": {
              "path": "media/E22/E22_A__multiview.mp4",
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              "duration_seconds": 60.64
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          }
        },
        {
          "video_id": "E22-B",
          "variant": "B",
          "observed_demo": "车前绿、车左蓝、车右红",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E22/E22_B__head.mp4",
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              "source": "native_independent_camera",
              "width": 640,
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              "frames": 1468,
              "fps": 25.0,
              "duration_seconds": 58.72
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            "left_wrist": {
              "path": "media/E22/E22_B__left_wrist.mp4",
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              "width": 640,
              "height": 480,
              "frames": 1468,
              "fps": 25.0,
              "duration_seconds": 58.72
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            "right_wrist": {
              "path": "media/E22/E22_B__right_wrist.mp4",
              "sha256": "65dffe43338cc0ebf445b2a2c282a3b253538459f816759ebaec9f812d2ff1a8",
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              "duration_seconds": 58.72
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            "multiview": {
              "path": "media/E22/E22_B__multiview.mp4",
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          }
        },
        {
          "video_id": "E22-C",
          "variant": "C",
          "observed_demo": "车前蓝、车左红、车右绿",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E22/E22_C__head.mp4",
              "sha256": "02d410ee976a1256ee424607523f086ca8914ebefff09d340302c56084e09daa",
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              "width": 640,
              "height": 480,
              "frames": 1467,
              "fps": 25.0,
              "duration_seconds": 58.68
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            "left_wrist": {
              "path": "media/E22/E22_C__left_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1467,
              "fps": 25.0,
              "duration_seconds": 58.68
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            "right_wrist": {
              "path": "media/E22/E22_C__right_wrist.mp4",
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            "multiview": {
              "path": "media/E22/E22_C__multiview.mp4",
              "sha256": "286516ff0089ba4966a0e9a775df41530ecd4710544010f2d21cd84758fc333b",
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          }
        }
      ]
    },
    {
      "id": "E23",
      "title": "按层位将彩杯套上杯架",
      "category": "层位/套挂",
      "inference_prompt": "按示范的颜色高低次序，把三个杯子套到杯架的三个高度层。",
      "evaluation_scope": "各杯受正确高度枝杈支撑；同层任一可用枝均可。",
      "scope_note": "实际为无把手塑料杯，杯口套入枝杈悬挂；不是杯柄穿钩，也无图形标记。各层有多枝，演示只明确高低层位，勿额外指定同层枝方向。",
      "variants": [
        {
          "video_id": "E23-A",
          "variant": "A",
          "observed_demo": "从高到低红、绿、蓝",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E23/E23_A__head.mp4",
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              "frames": 6003,
              "fps": 25.0,
              "duration_seconds": 240.12
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            "left_wrist": {
              "path": "media/E23/E23_A__left_wrist.mp4",
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              "width": 640,
              "height": 480,
              "frames": 6003,
              "fps": 25.0,
              "duration_seconds": 240.12
            },
            "right_wrist": {
              "path": "media/E23/E23_A__right_wrist.mp4",
              "sha256": "bac1c848fdb4487cc7febdfe3155ec95e59362e53820665bf8ce8407d0a29a9b",
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              "width": 640,
              "height": 480,
              "frames": 6003,
              "fps": 25.0,
              "duration_seconds": 240.12
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            "multiview": {
              "path": "media/E23/E23_A__multiview.mp4",
              "sha256": "8afb60d45c4bb654aea10bfff17f03569443ec0c1cef539e6b73eae98135b75f",
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              "duration_seconds": 240.12
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          }
        },
        {
          "video_id": "E23-B",
          "variant": "B",
          "observed_demo": "从高到低红、蓝、绿",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E23/E23_B__head.mp4",
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            "left_wrist": {
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              "height": 480,
              "frames": 5634,
              "fps": 25.0,
              "duration_seconds": 225.36
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            "right_wrist": {
              "path": "media/E23/E23_B__right_wrist.mp4",
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            "multiview": {
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        },
        {
          "video_id": "E23-C",
          "variant": "C",
          "observed_demo": "从高到低蓝、绿、红",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E23/E23_C__head.mp4",
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              "duration_seconds": 267.84
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            "left_wrist": {
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              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 267.84
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            "right_wrist": {
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              "duration_seconds": 267.84
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            "multiview": {
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          }
        }
      ]
    },
    {
      "id": "E24",
      "title": "彩杯按序装盒并盖盖",
      "category": "装盒时序/闭合",
      "inference_prompt": "按示范的颜色顺序把三个杯子装入盒中，最后盖好盒盖。",
      "evaluation_scope": "入盒时序正确、三杯留盒内、盖合；记录盖前过程。",
      "scope_note": "实录用杯而非木条；杯口朝上，从左到右排放。关盖前的入盒时序需保留，终态闭盒无法单独证明顺序。",
      "variants": [
        {
          "video_id": "E24-A",
          "variant": "A",
          "observed_demo": "红→绿→蓝依次装盒，盖上盒盖",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E24/E24_A__head.mp4",
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              "duration_seconds": 202.92
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            "left_wrist": {
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              "fps": 25.0,
              "duration_seconds": 202.92
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            "right_wrist": {
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            "multiview": {
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          }
        },
        {
          "video_id": "E24-B",
          "variant": "B",
          "observed_demo": "绿→蓝→红依次装盒，盖上盒盖",
          "status": "verified_prototype",
          "views": {
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              "width": 640,
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              "fps": 25.0,
              "duration_seconds": 203.04
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          }
        },
        {
          "video_id": "E24-C",
          "variant": "C",
          "observed_demo": "蓝→红→绿依次装盒，盖上盒盖",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E24/E24_C__head.mp4",
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            "left_wrist": {
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              "duration_seconds": 203.0
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            "right_wrist": {
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          }
        }
      ]
    },
    {
      "id": "E25",
      "title": "餐具朝向与盘边布局",
      "category": "朝向/餐具布局",
      "inference_prompt": "按示范中餐具相对餐盘的位置和端点朝向，布置勺、刀、叉。",
      "evaluation_scope": "相对盘边区域、柄端/工作端方向及横向顺序正确。",
      "scope_note": "实录包含盘作参照，并非单独餐具长度排序。A/B左右顺序均勺刀叉；C右侧由内到外勺叉。",
      "variants": [
        {
          "video_id": "E25-A",
          "variant": "A",
          "observed_demo": "勺、刀、叉排在盘远侧，柄端靠盘",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E25/E25_A__head.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1759,
              "fps": 25.0,
              "duration_seconds": 70.36
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            "left_wrist": {
              "path": "media/E25/E25_A__left_wrist.mp4",
              "sha256": "b8b3a436187af67fb9210294ed276732f285b313f579d1077b249e62f8f8b266",
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              "width": 640,
              "height": 480,
              "frames": 1759,
              "fps": 25.0,
              "duration_seconds": 70.36
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            "right_wrist": {
              "path": "media/E25/E25_A__right_wrist.mp4",
              "sha256": "a7073292ac7cfa77b6c727f51115d05b86e814063f20b66ff5497e5d2b735b97",
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              "height": 480,
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              "duration_seconds": 70.36
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            "multiview": {
              "path": "media/E25/E25_A__multiview.mp4",
              "sha256": "11258ee821f90c65fe83ea6913c14c149b09c672111e27593798a96cc299a856",
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              "fps": 25.0,
              "duration_seconds": 70.36
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          }
        },
        {
          "video_id": "E25-B",
          "variant": "B",
          "observed_demo": "勺、刀、叉排在盘远侧，工作端靠盘",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E25/E25_B__head.mp4",
              "sha256": "9ff359c4ecb6767ff2107f2692f2e0c2fceb1553bf0c2d314e23d5eeb66f4266",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2874,
              "fps": 25.0,
              "duration_seconds": 114.96
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            "left_wrist": {
              "path": "media/E25/E25_B__left_wrist.mp4",
              "sha256": "d793dc583cbf6f44a5c88ea36ad8af15d871128c6e864abbf3bcd2270fa49e0d",
              "bytes": 3531648,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2874,
              "fps": 25.0,
              "duration_seconds": 114.96
            },
            "right_wrist": {
              "path": "media/E25/E25_B__right_wrist.mp4",
              "sha256": "6dc038d52bbeb4b1e3c01e2f9139c718ffe79f2efd8b7a6c2b578c87076faeb0",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2874,
              "fps": 25.0,
              "duration_seconds": 114.96
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            "multiview": {
              "path": "media/E25/E25_B__multiview.mp4",
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              "width": 1440,
              "height": 720,
              "frames": 2874,
              "fps": 25.0,
              "duration_seconds": 114.96
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          }
        },
        {
          "video_id": "E25-C",
          "variant": "C",
          "observed_demo": "刀放盘左侧，勺和叉放盘右侧，柄朝操作者",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E25/E25_C__head.mp4",
              "sha256": "68ab0efac6a45c88b6eeffea7b6d1eb7530373094bc2c3899cc7a5d18e7dbd1f",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1614,
              "fps": 25.0,
              "duration_seconds": 64.56
            },
            "left_wrist": {
              "path": "media/E25/E25_C__left_wrist.mp4",
              "sha256": "e327b326b6d863f9d0f369c766be521823e002c47dd104ca65fdc427e885963e",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1614,
              "fps": 25.0,
              "duration_seconds": 64.56
            },
            "right_wrist": {
              "path": "media/E25/E25_C__right_wrist.mp4",
              "sha256": "585ce21e789329fa540e3dd028e5f8eccf98d1304a56e0a1f8bebe89cbe253f3",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1614,
              "fps": 25.0,
              "duration_seconds": 64.56
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            "multiview": {
              "path": "media/E25/E25_C__multiview.mp4",
              "sha256": "3987fb0890c1a4ce5f1a0742d8ad69261cf3d314831836b0b9b3e8b9ee167beb",
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              "frames": 1614,
              "fps": 25.0,
              "duration_seconds": 64.56
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          }
        }
      ]
    },
    {
      "id": "E26",
      "title": "数字牌与按铃次数",
      "category": "数值→动作次数",
      "inference_prompt": "根据示范展示的数字牌与左右按铃次数之间的对应方式，完成按铃。",
      "evaluation_scope": "真实按压释放沿计数；A同位、B交换；C左铃为两数之和、右铃0次。",
      "scope_note": "6 fps复查计数；C为用户确认的临时规则：左铃按两数之和、右铃不按。三片都是9与1，若考不同数对的算式泛化，宜另补一个不同数对的同规则实例。",
      "variants": [
        {
          "video_id": "E26-A",
          "variant": "A",
          "observed_demo": "左铃按左牌数字，右铃按右牌数字（本片9、1次）",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E26/E26_A__head.mp4",
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              "width": 640,
              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 22.72
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            "left_wrist": {
              "path": "media/E26/E26_A__left_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 568,
              "fps": 25.0,
              "duration_seconds": 22.72
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            "right_wrist": {
              "path": "media/E26/E26_A__right_wrist.mp4",
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              "fps": 25.0,
              "duration_seconds": 22.72
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            "multiview": {
              "path": "media/E26/E26_A__multiview.mp4",
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              "duration_seconds": 22.72
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          }
        },
        {
          "video_id": "E26-B",
          "variant": "B",
          "observed_demo": "左铃按右牌数字，右铃按左牌数字（本片1、9次）",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E26/E26_B__head.mp4",
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              "duration_seconds": 22.72
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            "left_wrist": {
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              "width": 640,
              "height": 480,
              "frames": 568,
              "fps": 25.0,
              "duration_seconds": 22.72
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            "right_wrist": {
              "path": "media/E26/E26_B__right_wrist.mp4",
              "sha256": "4bed005783c759f98012894fbc9045e0ac59f424600a59b4898a644bd4b27363",
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              "fps": 25.0,
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            "multiview": {
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              "duration_seconds": 22.72
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          }
        },
        {
          "video_id": "E26-C",
          "variant": "C",
          "observed_demo": "仅左铃按两牌数字之和，右铃不按（本片10、0次）",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E26/E26_C__head.mp4",
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              "duration_seconds": 20.52
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            "left_wrist": {
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              "fps": 25.0,
              "duration_seconds": 20.52
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            "right_wrist": {
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            "multiview": {
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      ]
    },
    {
      "id": "E27",
      "title": "盘旁勺叉摆放",
      "category": "餐具/左右布局",
      "inference_prompt": "按示范中勺叉相对于餐盘的位置关系摆放餐具。左右以你的用餐侧为准。",
      "evaluation_scope": "左右与内外关系正确，柄朝操作者；餐盘内不压放餐具。",
      "scope_note": "三片柄均朝操作者。C不是题单所写都在远侧；实录A/C叉落点相同，只改变勺。圆盘没有清楚朝向，应定义以操作者为参照。",
      "variants": [
        {
          "video_id": "E27-A",
          "variant": "A",
          "observed_demo": "叉在盘左、勺在盘右",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E27/E27_A__head.mp4",
              "sha256": "b528f40689c74b058ef2a6d916fda97fc80cd029dd47ed470f26315d601a6ff0",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1370,
              "fps": 25.0,
              "duration_seconds": 54.8
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            "left_wrist": {
              "path": "media/E27/E27_A__left_wrist.mp4",
              "sha256": "2e35093a393398d9ae1edced7d63ef0f7a57fef2b7255003c5cbed9dfee06c42",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1370,
              "fps": 25.0,
              "duration_seconds": 54.8
            },
            "right_wrist": {
              "path": "media/E27/E27_A__right_wrist.mp4",
              "sha256": "30beea28ee00b5e6c9427d0b552aad34516b8615dece3dcbfe961e5107ea6d52",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1370,
              "fps": 25.0,
              "duration_seconds": 54.8
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            "multiview": {
              "path": "media/E27/E27_A__multiview.mp4",
              "sha256": "21de8a6bf9ef82a632e551633b8555630cf77a25e5a4bb8c193a84cbe430c410",
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              "fps": 25.0,
              "duration_seconds": 54.8
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          }
        },
        {
          "video_id": "E27-B",
          "variant": "B",
          "observed_demo": "勺在盘左、叉在盘右",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E27/E27_B__head.mp4",
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              "width": 640,
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              "fps": 25.0,
              "duration_seconds": 58.04
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            "left_wrist": {
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              "width": 640,
              "height": 480,
              "frames": 1451,
              "fps": 25.0,
              "duration_seconds": 58.04
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            "right_wrist": {
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            "multiview": {
              "path": "media/E27/E27_B__multiview.mp4",
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          }
        },
        {
          "video_id": "E27-C",
          "variant": "C",
          "observed_demo": "勺叉都放盘左侧，靠盘为勺，外侧为叉",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E27/E27_C__head.mp4",
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              "duration_seconds": 58.28
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            "left_wrist": {
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              "fps": 25.0,
              "duration_seconds": 58.28
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      ]
    },
    {
      "id": "E28",
      "title": "用平铲选取食物装盘",
      "category": "选择/工具承托",
      "inference_prompt": "按示范的食物选择方式，用平铲将相应食物送到餐盘里。",
      "evaluation_scope": "正确食物入盘且运输中由铲面承托；允许另一手辅助上铲。",
      "scope_note": "非翻面任务，放盘后可见面保持。左手扶稳并辅助上铲，不能额外禁止辅助接触；无固定刮沿或交付槽。C可见先长方后圆，但题意选择两件，不据此新增顺序约束。",
      "variants": [
        {
          "video_id": "E28-A",
          "variant": "A",
          "observed_demo": "铲起黄色长方食物放入盘中",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E28/E28_A__head.mp4",
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              "duration_seconds": 136.28
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            "left_wrist": {
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              "fps": 25.0,
              "duration_seconds": 136.28
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            "right_wrist": {
              "path": "media/E28/E28_A__right_wrist.mp4",
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            "multiview": {
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          }
        },
        {
          "video_id": "E28-B",
          "variant": "B",
          "observed_demo": "铲起白黄色圆形食物放入盘中",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E28/E28_B__head.mp4",
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              "duration_seconds": 142.92
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            "left_wrist": {
              "path": "media/E28/E28_B__left_wrist.mp4",
              "sha256": "0d2048124766c843d22006edb0816e9a6cb87b045e34b4d0407e710888d8625f",
              "bytes": 2380517,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 3573,
              "fps": 25.0,
              "duration_seconds": 142.92
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            "right_wrist": {
              "path": "media/E28/E28_B__right_wrist.mp4",
              "sha256": "6fe5ef3f502457b7ab597162af93864e41c2ab545045db0e40ea1b8709bb1811",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 3573,
              "fps": 25.0,
              "duration_seconds": 142.92
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            "multiview": {
              "path": "media/E28/E28_B__multiview.mp4",
              "sha256": "07b3f5c522d73f5f830ce261d1ba23c8da5b8ded4c672b87e8b0fafcc4221cfc",
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              "width": 1440,
              "height": 720,
              "frames": 3573,
              "fps": 25.0,
              "duration_seconds": 142.92
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          }
        },
        {
          "video_id": "E28-C",
          "variant": "C",
          "observed_demo": "两块食物都铲入盘中",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E28/E28_C__head.mp4",
              "sha256": "270d7f7a42559b6d84d4301b706bddcb7030a687fd18e932b148c6c2fdd56270",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 7381,
              "fps": 25.0,
              "duration_seconds": 295.24
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            "left_wrist": {
              "path": "media/E28/E28_C__left_wrist.mp4",
              "sha256": "9762c2b7143bbb745a791754de956aaaf013a19962c15bc08c63f88256db932a",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 7381,
              "fps": 25.0,
              "duration_seconds": 295.24
            },
            "right_wrist": {
              "path": "media/E28/E28_C__right_wrist.mp4",
              "sha256": "3e6e59c1e122bed584d3a03001585582ed365172da251669c8bd9418803dc50e",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 7381,
              "fps": 25.0,
              "duration_seconds": 295.24
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            "multiview": {
              "path": "media/E28/E28_C__multiview.mp4",
              "sha256": "a5bdb82b906161cdec07f82da3ac27021bf6dd7748a2cf906dca226dba519a59",
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              "frames": 7381,
              "fps": 25.0,
              "duration_seconds": 295.24
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          }
        }
      ]
    },
    {
      "id": "E29",
      "title": "琴槌敲击音阶顺序",
      "category": "工具/敲击时序",
      "inference_prompt": "用琴槌按照示范的键位先后顺序敲击这套八键琴。",
      "evaluation_scope": "逐次槌头接触序列正确；C两遍端点8各计一次；不比节奏。",
      "scope_note": "共8根金属琴键，按最长到最短编号1–8。C端点8重复，不可省略为15次。动作顺序由接触事件评估，不要求固定节奏或与原片音高一致。",
      "variants": [
        {
          "video_id": "E29-A",
          "variant": "A",
          "observed_demo": "从最长键到最短键依次各敲1次：1→2→3→4→5→6→7→8",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E29/E29_A__head.mp4",
              "sha256": "4db53a47b337b446f1e3f458e0e35ac124cff9724cd0bb6b6526e020f1670e4c",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 789,
              "fps": 25.0,
              "duration_seconds": 31.56
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            "left_wrist": {
              "path": "media/E29/E29_A__left_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 789,
              "fps": 25.0,
              "duration_seconds": 31.56
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            "right_wrist": {
              "path": "media/E29/E29_A__right_wrist.mp4",
              "sha256": "54c355d91bfcfd81d0dd7659cdf66ce63ee607e3d49a861888d8f79cb8b937c7",
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              "width": 640,
              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 31.56
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            "multiview": {
              "path": "media/E29/E29_A__multiview.mp4",
              "sha256": "072346cbedcd4e2f20c81e081789fd7d894f95a0886c138750338e6f7a89838d",
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              "width": 1440,
              "height": 720,
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              "fps": 25.0,
              "duration_seconds": 31.56
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          }
        },
        {
          "video_id": "E29-B",
          "variant": "B",
          "observed_demo": "从最短键到最长键依次各敲1次：8→7→6→5→4→3→2→1",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E29/E29_B__head.mp4",
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              "width": 640,
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              "fps": 25.0,
              "duration_seconds": 50.76
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            "left_wrist": {
              "path": "media/E29/E29_B__left_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1269,
              "fps": 25.0,
              "duration_seconds": 50.76
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            "right_wrist": {
              "path": "media/E29/E29_B__right_wrist.mp4",
              "sha256": "5687e6d9b0761d00ce8fbdb415034e80fca338b5e7c6a8aab863841ae1a3a2fc",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 50.76
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            "multiview": {
              "path": "media/E29/E29_B__multiview.mp4",
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              "fps": 25.0,
              "duration_seconds": 50.76
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          }
        },
        {
          "video_id": "E29-C",
          "variant": "C",
          "observed_demo": "往返各敲一遍：1→2→3→4→5→6→7→8→8→7→6→5→4→3→2→1",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E29/E29_C__head.mp4",
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              "width": 640,
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              "fps": 25.0,
              "duration_seconds": 79.44
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            "left_wrist": {
              "path": "media/E29/E29_C__left_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1986,
              "fps": 25.0,
              "duration_seconds": 79.44
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            "right_wrist": {
              "path": "media/E29/E29_C__right_wrist.mp4",
              "sha256": "e99a3de73e43380a148ec108ae2e7552d90d94d011bcb94ef96e27cac5d32d6e",
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              "width": 640,
              "height": 480,
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              "fps": 25.0,
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            "multiview": {
              "path": "media/E29/E29_C__multiview.mp4",
              "sha256": "f9791e0766cb762c618f4510059c33da2feef76a648c530eaf51b1b531de5da8",
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              "fps": 25.0,
              "duration_seconds": 79.44
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          }
        }
      ]
    },
    {
      "id": "E30",
      "title": "双层抽屉开合状态",
      "category": "关节状态选择",
      "inference_prompt": "按示范的上下层选择，将抽屉柜调整到相同的开合组合。",
      "evaluation_scope": "目标层可见开启、其余关闭；不要求统一拉出距离。",
      "scope_note": "C下层只拉出较短距离，视频未支持统一开度阈值；判定可见打开状态，不能强制两层拉到相同长度。",
      "variants": [
        {
          "video_id": "E30-A",
          "variant": "A",
          "observed_demo": "只打开上层红抽屉",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E30/E30_A__head.mp4",
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              "width": 640,
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              "fps": 25.0,
              "duration_seconds": 22.72
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            "left_wrist": {
              "path": "media/E30/E30_A__left_wrist.mp4",
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              "width": 640,
              "height": 480,
              "frames": 568,
              "fps": 25.0,
              "duration_seconds": 22.72
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            "right_wrist": {
              "path": "media/E30/E30_A__right_wrist.mp4",
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              "width": 640,
              "height": 480,
              "frames": 568,
              "fps": 25.0,
              "duration_seconds": 22.72
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            "multiview": {
              "path": "media/E30/E30_A__multiview.mp4",
              "sha256": "65cdd7c5b8ada5b676ae7f1c0fbf7c94e718d0d43b1a6a6bf0a3e0436522e378",
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              "duration_seconds": 22.72
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          }
        },
        {
          "video_id": "E30-B",
          "variant": "B",
          "observed_demo": "只打开下层蓝抽屉",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E30/E30_B__head.mp4",
              "sha256": "c6236da062582befa3c93d183962e14c0de1d62684a4bf268bf731cef6f714d6",
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              "duration_seconds": 24.6
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            "left_wrist": {
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              "width": 640,
              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 24.6
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            "right_wrist": {
              "path": "media/E30/E30_B__right_wrist.mp4",
              "sha256": "90388bb73c47123d57654c30c8d192813ecfad3fae2f23ab62ce4ac463a05fbf",
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              "fps": 25.0,
              "duration_seconds": 24.6
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            "multiview": {
              "path": "media/E30/E30_B__multiview.mp4",
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              "duration_seconds": 24.6
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          }
        },
        {
          "video_id": "E30-C",
          "variant": "C",
          "observed_demo": "上层和下层都打开",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E30/E30_C__head.mp4",
              "sha256": "79aae9149a7fed58856fd89b964f2eb677949b9b073961886901d4597c48c533",
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              "duration_seconds": 36.84
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            "left_wrist": {
              "path": "media/E30/E30_C__left_wrist.mp4",
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              "duration_seconds": 36.84
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            "right_wrist": {
              "path": "media/E30/E30_C__right_wrist.mp4",
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              "width": 640,
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              "fps": 25.0,
              "duration_seconds": 36.84
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            "multiview": {
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      ]
    },
    {
      "id": "E31",
      "title": "碗碟组合",
      "category": "容器/正反姿态",
      "inference_prompt": "按照示范的碗碟上下关系和盘面朝向，把碗与盘组合摆好。",
      "evaluation_scope": "A碗在盘内；B正盘盖碗；C反盘盖碗，稳定释放。",
      "scope_note": "需要区分盘的正反面，不能仅检查盘在碗上方。",
      "variants": [
        {
          "video_id": "E31-A",
          "variant": "A",
          "observed_demo": "碗口朝上放在正放的盘内",
          "status": "verified_prototype",
          "views": {
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        },
        {
          "video_id": "E31-B",
          "variant": "B",
          "observed_demo": "盘面朝上盖在碗口上",
          "status": "verified_prototype",
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        },
        {
          "video_id": "E31-C",
          "variant": "C",
          "observed_demo": "盘面朝下盖在碗口上",
          "status": "verified_prototype",
          "views": {
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              "height": 720,
              "frames": 2766,
              "fps": 25.0,
              "duration_seconds": 110.64
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          }
        }
      ]
    },
    {
      "id": "E32",
      "title": "杂乱桌面目标取放",
      "category": "杂物中身份选择",
      "inference_prompt": "从杂物中取出示范选择的同一类物品，放到白色交付板上。",
      "evaluation_scope": "目标身份与交付区域正确；仅移动对应变体指定的物品。",
      "scope_note": "A/B/C分别选择雪碧瓶、粉色方块和可乐瓶。按目标身份和交付区域判定；其他物品是干扰物，不要求复刻绝对摆位。",
      "variants": [
        {
          "video_id": "E32-A",
          "variant": "A",
          "observed_demo": "取雪碧瓶到白色交付板",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E32/E32_A__head.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 961,
              "fps": 25.0,
              "duration_seconds": 38.44
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            "left_wrist": {
              "path": "media/E32/E32_A__left_wrist.mp4",
              "sha256": "6325dfd7d9ec479c25ce943792163141ed3a01694c8c472c5a91f0ee33d1255f",
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              "width": 640,
              "height": 480,
              "frames": 961,
              "fps": 25.0,
              "duration_seconds": 38.44
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            "right_wrist": {
              "path": "media/E32/E32_A__right_wrist.mp4",
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              "path": "media/E32/E32_A__multiview.mp4",
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              "fps": 25.0,
              "duration_seconds": 38.44
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          }
        },
        {
          "video_id": "E32-B",
          "variant": "B",
          "observed_demo": "取粉色方块到白色交付板",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E32/E32_B__head.mp4",
              "sha256": "dc19347efdbdff9481a81a3125a997664cc52886884bd1ac9a75ccc417d2c649",
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              "width": 640,
              "height": 480,
              "frames": 1369,
              "fps": 25.0,
              "duration_seconds": 54.76
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            "left_wrist": {
              "path": "media/E32/E32_B__left_wrist.mp4",
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              "width": 640,
              "height": 480,
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              "duration_seconds": 54.76
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            "right_wrist": {
              "path": "media/E32/E32_B__right_wrist.mp4",
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              "height": 480,
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              "path": "media/E32/E32_B__multiview.mp4",
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              "duration_seconds": 54.76
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          }
        },
        {
          "video_id": "E32-C",
          "variant": "C",
          "observed_demo": "取可乐瓶到白色交付板",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E32/E32_C__head.mp4",
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              "width": 640,
              "height": 480,
              "frames": 867,
              "fps": 25.0,
              "duration_seconds": 34.68
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            "left_wrist": {
              "path": "media/E32/E32_C__left_wrist.mp4",
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              "width": 640,
              "height": 480,
              "frames": 867,
              "fps": 25.0,
              "duration_seconds": 34.68
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            "right_wrist": {
              "path": "media/E32/E32_C__right_wrist.mp4",
              "sha256": "8845a1dfd8f897b50749912381cd7a0544066c54933ed9a38fd2ef5eae09c16f",
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              "path": "media/E32/E32_C__multiview.mp4",
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              "fps": 25.0,
              "duration_seconds": 34.68
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          }
        }
      ]
    },
    {
      "id": "E33",
      "title": "指定饮料瓶投入垃圾桶",
      "category": "身份选择/投入",
      "inference_prompt": "按示范的瓶子选择，把对应饮料瓶放入垃圾桶，其余瓶子留在桌上。",
      "evaluation_scope": "唯一选中瓶留在桶内；其他瓶不入桶。",
      "scope_note": "其余四瓶留在桌上；桶已开口，不要求开盖或关盖。",
      "variants": [
        {
          "video_id": "E33-A",
          "variant": "A",
          "observed_demo": "只把雪碧瓶投入桶中",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E33/E33_A__head.mp4",
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              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 32.68
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            "left_wrist": {
              "path": "media/E33/E33_A__left_wrist.mp4",
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              "width": 640,
              "height": 480,
              "frames": 817,
              "fps": 25.0,
              "duration_seconds": 32.68
            },
            "right_wrist": {
              "path": "media/E33/E33_A__right_wrist.mp4",
              "sha256": "ebd8c0bb377faac90853c43886cfe04df0a23cbcf490218996c1f433bcd049c0",
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              "width": 640,
              "height": 480,
              "frames": 817,
              "fps": 25.0,
              "duration_seconds": 32.68
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            "multiview": {
              "path": "media/E33/E33_A__multiview.mp4",
              "sha256": "44e1f957b34d762a0f52a99a4929947d10006008c004450935eebdd6f81f70af",
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              "fps": 25.0,
              "duration_seconds": 32.68
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          }
        },
        {
          "video_id": "E33-B",
          "variant": "B",
          "observed_demo": "只把可乐瓶投入桶中",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E33/E33_B__head.mp4",
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              "duration_seconds": 34.72
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            "left_wrist": {
              "path": "media/E33/E33_B__left_wrist.mp4",
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              "width": 640,
              "height": 480,
              "frames": 868,
              "fps": 25.0,
              "duration_seconds": 34.72
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            "right_wrist": {
              "path": "media/E33/E33_B__right_wrist.mp4",
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              "fps": 25.0,
              "duration_seconds": 34.72
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            "multiview": {
              "path": "media/E33/E33_B__multiview.mp4",
              "sha256": "07e983c90b71928c95dc7e25aa490525bf211738476a57d1578d56ebdc37fdd1",
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              "fps": 25.0,
              "duration_seconds": 34.72
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          }
        },
        {
          "video_id": "E33-C",
          "variant": "C",
          "observed_demo": "只把橙色芬达瓶投入桶中",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E33/E33_C__head.mp4",
              "sha256": "7e99c8257eada677436e90e41e7cd268483845d7cc3ac7492fba24002e4aa8e7",
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              "duration_seconds": 33.2
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            "left_wrist": {
              "path": "media/E33/E33_C__left_wrist.mp4",
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              "fps": 25.0,
              "duration_seconds": 33.2
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            "right_wrist": {
              "path": "media/E33/E33_C__right_wrist.mp4",
              "sha256": "62e100283406b09b7c197c227e31da11d9193376261aacb898cd6550b148f027",
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              "duration_seconds": 33.2
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            "multiview": {
              "path": "media/E33/E33_C__multiview.mp4",
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              "duration_seconds": 33.2
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          }
        }
      ]
    },
    {
      "id": "E34",
      "title": "挑选餐具放入收纳盘",
      "category": "工具身份选择",
      "inference_prompt": "挑选示范中的那种餐具，将柄端放到收纳盘左上格，其余餐具不动。",
      "evaluation_scope": "选中餐具柄端入指定格，允许工作端伸出，稳定释放。",
      "scope_note": "实际只有一件选中餐具入盘，不是三件分格收纳；长度超过格子，工作端搭在盘外，不能要求整件完全落在格内；未盖盖。",
      "variants": [
        {
          "video_id": "E34-A",
          "variant": "A",
          "observed_demo": "只把餐刀放到盘左上格",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E34/E34_A__head.mp4",
              "sha256": "41d31c1dbe9ff0adbe9c9e97940026f62c922007d21628ae98e286ac859e00cf",
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              "width": 640,
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              "fps": 25.0,
              "duration_seconds": 39.68
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            "left_wrist": {
              "path": "media/E34/E34_A__left_wrist.mp4",
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              "fps": 25.0,
              "duration_seconds": 39.68
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            "right_wrist": {
              "path": "media/E34/E34_A__right_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 39.68
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            "multiview": {
              "path": "media/E34/E34_A__multiview.mp4",
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              "fps": 25.0,
              "duration_seconds": 39.68
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          }
        },
        {
          "video_id": "E34-B",
          "variant": "B",
          "observed_demo": "只把勺子放到盘左上格",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E34/E34_B__head.mp4",
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              "fps": 25.0,
              "duration_seconds": 34.72
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            "right_wrist": {
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              "duration_seconds": 34.72
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          }
        },
        {
          "video_id": "E34-C",
          "variant": "C",
          "observed_demo": "只把叉子放到盘左上格",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E34/E34_C__head.mp4",
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            "left_wrist": {
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              "fps": 25.0,
              "duration_seconds": 37.56
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            "right_wrist": {
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          }
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      ]
    },
    {
      "id": "E35",
      "title": "按尺寸关系叠三块",
      "category": "尺寸层序",
      "inference_prompt": "按照示范中的大小层序，把三块积木叠成稳定的一摞。",
      "evaluation_scope": "尺寸秩次对应正确，真实支撑且释放；不限制绝对尺寸。",
      "scope_note": "三块同色不同尺寸；与彩色等大小叠放分题。B/C需要稳定支撑，但不要求重心/精确坐标完全复刻。",
      "variants": [
        {
          "video_id": "E35-A",
          "variant": "A",
          "observed_demo": "从下到上大、中、小",
          "status": "verified_prototype",
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              "duration_seconds": 43.0
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              "duration_seconds": 43.0
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          }
        },
        {
          "video_id": "E35-B",
          "variant": "B",
          "observed_demo": "从下到上小、中、大",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E35/E35_B__head.mp4",
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              "width": 640,
              "height": 480,
              "frames": 1138,
              "fps": 25.0,
              "duration_seconds": 45.52
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            "left_wrist": {
              "path": "media/E35/E35_B__left_wrist.mp4",
              "sha256": "cf82e3f58842a6860c44a4da8c4e501f6f9497045514bec5f18989aa79a4ec13",
              "bytes": 345750,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1138,
              "fps": 25.0,
              "duration_seconds": 45.52
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            "right_wrist": {
              "path": "media/E35/E35_B__right_wrist.mp4",
              "sha256": "b1004455d85ed7e11b47cc7468b1f3884ba8fc78776adffbc61f5a8359f5d7d1",
              "bytes": 1130566,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1138,
              "fps": 25.0,
              "duration_seconds": 45.52
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            "multiview": {
              "path": "media/E35/E35_B__multiview.mp4",
              "sha256": "3d3a1ed7c6530c5331e37b018777999cc4a96bdad93cd3c6822027df7bd9409f",
              "bytes": 2958390,
              "source": "native_synchronized_composite",
              "width": 1440,
              "height": 720,
              "frames": 1138,
              "fps": 25.0,
              "duration_seconds": 45.52
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          }
        },
        {
          "video_id": "E35-C",
          "variant": "C",
          "observed_demo": "从下到上大、小、中",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E35/E35_C__head.mp4",
              "sha256": "69162a2e2e29c2c1c87def4b818db77c581db9eeedc6393638db4157a9024233",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1081,
              "fps": 25.0,
              "duration_seconds": 43.24
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            "left_wrist": {
              "path": "media/E35/E35_C__left_wrist.mp4",
              "sha256": "614c591e7425db476726366afe1decc7003ce8cd70baef23a587e09a90202abe",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1081,
              "fps": 25.0,
              "duration_seconds": 43.24
            },
            "right_wrist": {
              "path": "media/E35/E35_C__right_wrist.mp4",
              "sha256": "97e81314aeb8b393c04972678c3b0740fc2547f479bfb0340816b4131f226f55",
              "bytes": 1039975,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1081,
              "fps": 25.0,
              "duration_seconds": 43.24
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            "multiview": {
              "path": "media/E35/E35_C__multiview.mp4",
              "sha256": "e52a24ce82a1648a9edb3b0e5b1c58020800a5877dfbd774f35c88310e2565b6",
              "bytes": 2772202,
              "source": "native_synchronized_composite",
              "width": 1440,
              "height": 720,
              "frames": 1081,
              "fps": 25.0,
              "duration_seconds": 43.24
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          }
        }
      ]
    },
    {
      "id": "E36",
      "title": "按数量装球",
      "category": "数量选择",
      "inference_prompt": "按示范中的入盒数量，向空盒放入相同数量的球，其余留在外面。",
      "evaluation_scope": "盒中球总数为1/2/3；不限制颜色、顺序，不要求盖盒。",
      "scope_note": "实录分别选红、红粉、红粉浅粉；题单新增备注只规定数量，应在prompt明确学习数量，勿把颜色/取放顺序当额外限制。盒盖始终在旁，不要求盖盒。",
      "variants": [
        {
          "video_id": "E36-A",
          "variant": "A",
          "observed_demo": "向空盒放入1个球",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E36/E36_A__head.mp4",
              "sha256": "e691d7ef7073fe68b2d9e1ba64dea6631bd485451a9ba28210316b6e8ed86fee",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 434,
              "fps": 25.0,
              "duration_seconds": 17.36
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            "left_wrist": {
              "path": "media/E36/E36_A__left_wrist.mp4",
              "sha256": "343984c1af3c48555e68601814161aa7cc24b59976a7f20433e4f521ea92b788",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 434,
              "fps": 25.0,
              "duration_seconds": 17.36
            },
            "right_wrist": {
              "path": "media/E36/E36_A__right_wrist.mp4",
              "sha256": "fb6712f2015583cf0479c86703e23b4281c04fe2af0d53d2c26e1763636003c3",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 434,
              "fps": 25.0,
              "duration_seconds": 17.36
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            "multiview": {
              "path": "media/E36/E36_A__multiview.mp4",
              "sha256": "6183cc19f65f1850787c648430e2149025d3a4f1f31f69190cf775945fa4ec5e",
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              "width": 1440,
              "height": 720,
              "frames": 434,
              "fps": 25.0,
              "duration_seconds": 17.36
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          }
        },
        {
          "video_id": "E36-B",
          "variant": "B",
          "observed_demo": "向空盒放入2个球",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E36/E36_B__head.mp4",
              "sha256": "d47bdf6b7e165558ab14245fe6f444f6bdc1a91e2aad07746fa37e877b4ada88",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 702,
              "fps": 25.0,
              "duration_seconds": 28.08
            },
            "left_wrist": {
              "path": "media/E36/E36_B__left_wrist.mp4",
              "sha256": "8d5d4b3d392f5bac1b927412ef67ebd788af92ec9e0f57559c48b87bcc4ea327",
              "bytes": 257183,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 702,
              "fps": 25.0,
              "duration_seconds": 28.08
            },
            "right_wrist": {
              "path": "media/E36/E36_B__right_wrist.mp4",
              "sha256": "7e1dc7058a7bd114edda9756cf4f0681a9fef77b2e8e014379ee4b125ecdeb59",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 702,
              "fps": 25.0,
              "duration_seconds": 28.08
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            "multiview": {
              "path": "media/E36/E36_B__multiview.mp4",
              "sha256": "c2f2981f644a3bfac87b3b975ee4dc04ec9fbb3cb9eefa5a9f8f1daac218c250",
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              "fps": 25.0,
              "duration_seconds": 28.08
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          }
        },
        {
          "video_id": "E36-C",
          "variant": "C",
          "observed_demo": "向空盒放入3个球",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E36/E36_C__head.mp4",
              "sha256": "3a384d79ba20d66c3552c66d6739d346f9006fbc407a10c1bb13e1e67474bfdf",
              "bytes": 1419945,
              "source": "original_head_byte_copy",
              "width": 640,
              "height": 480,
              "frames": 1833,
              "fps": 25.0,
              "duration_seconds": 73.32
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            "left_wrist": {
              "path": "media/E36/E36_C__left_wrist.mp4",
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              "source": "crop_from_original_multiview",
              "width": 480,
              "height": 360,
              "frames": 1833,
              "fps": 25.0,
              "duration_seconds": 73.32
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            "right_wrist": {
              "path": "media/E36/E36_C__right_wrist.mp4",
              "sha256": "6075923f19088e3749ed97c9cc02ac7174be307364b266c86caf6265e6bace21",
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              "source": "crop_from_original_multiview",
              "width": 480,
              "height": 360,
              "frames": 1833,
              "fps": 25.0,
              "duration_seconds": 73.32
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            "multiview": {
              "path": "media/E36/E36_C__multiview.mp4",
              "sha256": "dc3d7bfd0fec989c871b704c585bc2b57b9627497598e26be604219d1d788c34",
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              "frames": 1833,
              "fps": 25.0,
              "duration_seconds": 73.32
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          }
        }
      ]
    },
    {
      "id": "E37",
      "title": "用螺丝刀拆指定螺丝",
      "category": "工具/紧固件选择",
      "inference_prompt": "按示范的左右选择，用螺丝刀拆下相应螺丝，其余保持固定。",
      "evaluation_scope": "目标螺丝通过刀具驱动松脱并分离，非目标保持；圈数不固定。",
      "scope_note": "以操作者面对横梁时的左右为准；C先左后右可见，但新增备注未把时序作为规则；不规定圈数，判定目标紧固件分离。",
      "variants": [
        {
          "video_id": "E37-A",
          "variant": "A",
          "observed_demo": "卸下左侧螺丝，保留右侧",
          "status": "verified_partial_rotation_demo",
          "views": {
            "head": {
              "path": "media/E37/E37_A__head.mp4",
              "sha256": "da3046f3ebb9f83ec9606d4ebbe09c180dac61faf0ee95790f284834b0a67ad4",
              "bytes": 603539,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1148,
              "fps": 25.0,
              "duration_seconds": 45.92
            },
            "left_wrist": {
              "path": "media/E37/E37_A__left_wrist.mp4",
              "sha256": "d3fe3693d3eb45a2666d586787e44d9da010fa0f3f0df97e716265a5c9a6f27a",
              "bytes": 231828,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1148,
              "fps": 25.0,
              "duration_seconds": 45.92
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            "right_wrist": {
              "path": "media/E37/E37_A__right_wrist.mp4",
              "sha256": "30467d01340fc85bf3906b78cfbd7df4a1a7d4e0c5caa1bbc6cab10bb7afd875",
              "bytes": 845336,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1148,
              "fps": 25.0,
              "duration_seconds": 45.92
            },
            "multiview": {
              "path": "media/E37/E37_A__multiview.mp4",
              "sha256": "bd0daab6e699a74ae208be5a1d8c23f24bb155a7971b97f82b5d9f04de4f5769",
              "bytes": 1737161,
              "source": "native_synchronized_composite",
              "width": 1440,
              "height": 720,
              "frames": 1148,
              "fps": 25.0,
              "duration_seconds": 45.92
            }
          },
          "demo_type": "partial-rotation-demo",
          "simulation_instruction": "按示范的左右选择，用螺丝刀将相应螺丝拧松至少四分之一圈；不要求完全取出，其余保持固定。",
          "simulation_observed_demo": "左侧螺丝真实拧松至少90度，保留右侧",
          "original_strict_success": false
        },
        {
          "video_id": "E37-B",
          "variant": "B",
          "observed_demo": "卸下右侧螺丝，保留左侧",
          "status": "verified_partial_rotation_demo",
          "views": {
            "head": {
              "path": "media/E37/E37_B__head.mp4",
              "sha256": "f9ae05ed779c3a60e4b769c5b48743c901616e0cfe8505614008b666e9fa18d4",
              "bytes": 650234,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1177,
              "fps": 25.0,
              "duration_seconds": 47.08
            },
            "left_wrist": {
              "path": "media/E37/E37_B__left_wrist.mp4",
              "sha256": "1f8f653da3df052eeec7e77be1acd7e79ee0a96b58158717c7f42512eb6d5e0c",
              "bytes": 241010,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1177,
              "fps": 25.0,
              "duration_seconds": 47.08
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            "right_wrist": {
              "path": "media/E37/E37_B__right_wrist.mp4",
              "sha256": "6d80a7d390749fb08b953702168347fafed0fc139b8f8bca9fe4e0128709ca64",
              "bytes": 938079,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1177,
              "fps": 25.0,
              "duration_seconds": 47.08
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            "multiview": {
              "path": "media/E37/E37_B__multiview.mp4",
              "sha256": "3153fe77edeb503c274aafc356b7064d69265605fa161da611be9e85d5bfa890",
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              "source": "native_synchronized_composite",
              "width": 1440,
              "height": 720,
              "frames": 1177,
              "fps": 25.0,
              "duration_seconds": 47.08
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          },
          "demo_type": "partial-rotation-demo",
          "simulation_instruction": "按示范的左右选择，用螺丝刀将相应螺丝拧松至少四分之一圈；不要求完全取出，其余保持固定。",
          "simulation_observed_demo": "右侧螺丝真实拧松至少90度，保留左侧",
          "original_strict_success": false
        },
        {
          "video_id": "E37-C",
          "variant": "C",
          "observed_demo": "左右两颗螺丝都卸下",
          "status": "verified_partial_rotation_demo",
          "views": {
            "head": {
              "path": "media/E37/E37_C__head.mp4",
              "sha256": "83b381ea56f87856300e2bfb96ece8a8dad0a159799d396d01c2183f82904f48",
              "bytes": 1158822,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2012,
              "fps": 25.0,
              "duration_seconds": 80.48
            },
            "left_wrist": {
              "path": "media/E37/E37_C__left_wrist.mp4",
              "sha256": "fc5308c2b2527944aad71a7429b3e60868adc89a3260b2c426afa04d4ff58a5e",
              "bytes": 409235,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2012,
              "fps": 25.0,
              "duration_seconds": 80.48
            },
            "right_wrist": {
              "path": "media/E37/E37_C__right_wrist.mp4",
              "sha256": "74218ecb1a85b56da62576acd8c27f425df3fee36abe25ca1f8245e6b99b9196",
              "bytes": 1396926,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2012,
              "fps": 25.0,
              "duration_seconds": 80.48
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            "multiview": {
              "path": "media/E37/E37_C__multiview.mp4",
              "sha256": "9b5b3be1afabbdadaca4668e340662048a03d3198abe77c540d05a1eb788621f",
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              "source": "native_synchronized_composite",
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              "frames": 2012,
              "fps": 25.0,
              "duration_seconds": 80.48
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          },
          "demo_type": "partial-rotation-demo",
          "simulation_instruction": "按示范的左右选择，用螺丝刀将相应螺丝拧松至少四分之一圈；不要求完全取出，其余保持固定。",
          "simulation_observed_demo": "左右两颗螺丝各真实拧松至少90度",
          "original_strict_success": false
        }
      ]
    },
    {
      "id": "E38",
      "title": "彩环按序套同一根柱",
      "category": "穿柱/颜色层序",
      "inference_prompt": "按示范中的颜色层序，把三个环套在同一根指定立柱上。",
      "evaluation_scope": "三环真实穿柱且层序正确；杆须在任务中可识别。",
      "scope_note": "三环全部套在最右端单柱，非三环各配三柱。需要真实孔柱插入与上下层关系。",
      "variants": [
        {
          "video_id": "E38-A",
          "variant": "A",
          "observed_demo": "从下到上红、绿、蓝",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E38/E38_A__head.mp4",
              "sha256": "eccfcf6ad8c2a10f8fad562b2a6fba85a66c6ea43edad1423ed76baaee2a0ae8",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1693,
              "fps": 25.0,
              "duration_seconds": 67.72
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            "left_wrist": {
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              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 67.72
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            "right_wrist": {
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              "source": "native_independent_camera",
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              "fps": 25.0,
              "duration_seconds": 67.72
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            "multiview": {
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              "duration_seconds": 67.72
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          }
        },
        {
          "video_id": "E38-B",
          "variant": "B",
          "observed_demo": "从下到上红、蓝、绿",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E38/E38_B__head.mp4",
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              "duration_seconds": 67.72
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            "left_wrist": {
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1693,
              "fps": 25.0,
              "duration_seconds": 67.72
            },
            "right_wrist": {
              "path": "media/E38/E38_B__right_wrist.mp4",
              "sha256": "1f14659920ea21a81354fa01131f1fbd3dcface7b0a0761b5ee7a5b70c2fd2cf",
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              "source": "native_independent_camera",
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              "height": 480,
              "frames": 1693,
              "fps": 25.0,
              "duration_seconds": 67.72
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            "multiview": {
              "path": "media/E38/E38_B__multiview.mp4",
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          }
        },
        {
          "video_id": "E38-C",
          "variant": "C",
          "observed_demo": "从下到上蓝、绿、红",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E38/E38_C__head.mp4",
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              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 67.32
            },
            "left_wrist": {
              "path": "media/E38/E38_C__left_wrist.mp4",
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              "fps": 25.0,
              "duration_seconds": 67.32
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            "right_wrist": {
              "path": "media/E38/E38_C__right_wrist.mp4",
              "sha256": "e33952486ab28201892bbf1afc2bf06eb4e5742269a521500e6676bea23c8fd1",
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            "multiview": {
              "path": "media/E38/E38_C__multiview.mp4",
              "sha256": "2bce772c8fb66bd7c8b9d364cdaf53d150ef95723e127aa60756716903f87f89",
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              "duration_seconds": 67.32
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          }
        }
      ]
    },
    {
      "id": "E39",
      "title": "参照T形布局选择性纠正",
      "category": "参照/选择性纠正",
      "inference_prompt": "按示范展示的纠正范围，调整下排T形块，使相应属性与上排参照一致。",
      "evaluation_scope": "A仅次序、B仅朝向、C两者；不应变化的属性保留。",
      "scope_note": "上排是静态参照，下排为操作对象。A物件整体移近参照但保留朝向，位置判定应基于次序/对应槽位，避免要求原y坐标。",
      "variants": [
        {
          "video_id": "E39-A",
          "variant": "A",
          "observed_demo": "只把下排颜色次序改成上排次序，保持原朝向",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E39/E39_A__head.mp4",
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              "width": 640,
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              "fps": 25.0,
              "duration_seconds": 113.52
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            "left_wrist": {
              "path": "media/E39/E39_A__left_wrist.mp4",
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              "width": 640,
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              "fps": 25.0,
              "duration_seconds": 113.52
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            "right_wrist": {
              "path": "media/E39/E39_A__right_wrist.mp4",
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              "duration_seconds": 113.52
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            "multiview": {
              "path": "media/E39/E39_A__multiview.mp4",
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              "fps": 25.0,
              "duration_seconds": 113.52
            }
          }
        },
        {
          "video_id": "E39-B",
          "variant": "B",
          "observed_demo": "只把每种颜色的T转到对应参照朝向，保持位置",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E39/E39_B__head.mp4",
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              "width": 640,
              "height": 480,
              "frames": 2103,
              "fps": 25.0,
              "duration_seconds": 84.12
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            "left_wrist": {
              "path": "media/E39/E39_B__left_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2103,
              "fps": 25.0,
              "duration_seconds": 84.12
            },
            "right_wrist": {
              "path": "media/E39/E39_B__right_wrist.mp4",
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              "width": 640,
              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 84.12
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            "multiview": {
              "path": "media/E39/E39_B__multiview.mp4",
              "sha256": "5ad8f6f8478146a4a8b9897efa3cc4893d85057d5973d3a2a96fa166dc9da0fc",
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              "width": 1440,
              "height": 720,
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              "fps": 25.0,
              "duration_seconds": 84.12
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          }
        },
        {
          "video_id": "E39-C",
          "variant": "C",
          "observed_demo": "下排颜色次序和各T朝向都与上排一致",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E39/E39_C__head.mp4",
              "sha256": "9f133a40d8312c8d4c617241c7ff11dad252f4cb015dc32043eed0d06c29976e",
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              "height": 480,
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              "duration_seconds": 146.0
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            "left_wrist": {
              "path": "media/E39/E39_C__left_wrist.mp4",
              "sha256": "f7539be30c06ff55e36fc7fb80ac5ba1b80bc57102f93c59bf8370297f8c0014",
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              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 146.0
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            "right_wrist": {
              "path": "media/E39/E39_C__right_wrist.mp4",
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            "multiview": {
              "path": "media/E39/E39_C__multiview.mp4",
              "sha256": "580e473bd960cb5add9fa569748399f788d0422c6497e141fc05ade0e6224508",
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              "duration_seconds": 146.0
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          }
        }
      ]
    },
    {
      "id": "E40",
      "title": "在指定图形处夹长尾夹",
      "category": "选择/夹具固定",
      "inference_prompt": "按照示范的图形选择，在对应盘边夹上长尾夹。",
      "evaluation_scope": "正确图形边缘被真实夹口夹住并留夹，未选边无夹。",
      "scope_note": "虽然题单F09有删除标记，实录仍存在。真实道具为黑色长尾夹，夹在带图形标签的托盘外沿，夹臂需张开再释放；不是颜色衣夹。",
      "variants": [
        {
          "video_id": "E40-A",
          "variant": "A",
          "observed_demo": "夹住圆形和叉号对应的盘边",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E40/E40_A__head.mp4",
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              "source": "native_independent_camera",
              "width": 640,
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              "fps": 25.0,
              "duration_seconds": 69.28
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            "left_wrist": {
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              "width": 640,
              "height": 480,
              "frames": 1732,
              "fps": 25.0,
              "duration_seconds": 69.28
            },
            "right_wrist": {
              "path": "media/E40/E40_A__right_wrist.mp4",
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              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 69.28
            },
            "multiview": {
              "path": "media/E40/E40_A__multiview.mp4",
              "sha256": "2b9a6b1bea1fda063d9e5e0dda674072fa2ea265103c1a16da3aa01faa1eddab",
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              "fps": 25.0,
              "duration_seconds": 69.28
            }
          }
        },
        {
          "video_id": "E40-B",
          "variant": "B",
          "observed_demo": "夹住方形和三角形对应的盘边",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E40/E40_B__head.mp4",
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            "left_wrist": {
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            "multiview": {
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          }
        },
        {
          "video_id": "E40-C",
          "variant": "C",
          "observed_demo": "夹住圆形、三角形和叉号对应的盘边",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E40/E40_C__head.mp4",
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              "duration_seconds": 100.28
            },
            "left_wrist": {
              "path": "media/E40/E40_C__left_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2507,
              "fps": 25.0,
              "duration_seconds": 100.28
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            "right_wrist": {
              "path": "media/E40/E40_C__right_wrist.mp4",
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            "multiview": {
              "path": "media/E40/E40_C__multiview.mp4",
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          }
        }
      ]
    },
    {
      "id": "E41",
      "title": "为不同长度木条接续一段",
      "category": "长度对应/接续",
      "inference_prompt": "按示范中前段长度与接续段长度的对应关系，为每根木条接上一段。",
      "evaluation_scope": "短中长映射正确、端点邻接且方向共线；不要求总长精确相同。",
      "scope_note": "参照行初始从左到右短中长。直接记前段长度与备件长度对应，不用题单手写升降序等含混描述；不要求总长严格相等，视频尺寸并未精确量齐。",
      "variants": [
        {
          "video_id": "E41-A",
          "variant": "A",
          "observed_demo": "短前段接长备件，中前段接中备件，长前段接短备件",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E41/E41_A__head.mp4",
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              "duration_seconds": 58.4
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            "left_wrist": {
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              "fps": 25.0,
              "duration_seconds": 58.4
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            "right_wrist": {
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              "fps": 25.0,
              "duration_seconds": 58.4
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            "multiview": {
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              "duration_seconds": 58.4
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          }
        },
        {
          "video_id": "E41-B",
          "variant": "B",
          "observed_demo": "短接短、中接中、长接长",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E41/E41_B__head.mp4",
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              "width": 640,
              "height": 480,
              "frames": 1524,
              "fps": 25.0,
              "duration_seconds": 60.96
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            "multiview": {
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          }
        },
        {
          "video_id": "E41-C",
          "variant": "C",
          "observed_demo": "短接长、中接短、长接中",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E41/E41_C__head.mp4",
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              "duration_seconds": 56.48
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            "left_wrist": {
              "path": "media/E41/E41_C__left_wrist.mp4",
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              "frames": 1412,
              "fps": 25.0,
              "duration_seconds": 56.48
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            "right_wrist": {
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            "multiview": {
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          }
        }
      ]
    },
    {
      "id": "E42",
      "title": "用铲沿推球到图形区域",
      "category": "工具推动/目标选择",
      "inference_prompt": "用平铲的侧沿，把两个球推到示范选择的图形标记纸区域。",
      "evaluation_scope": "两球在目标纸区域并停稳，过程有铲沿推动；允许纸边容差。",
      "scope_note": "真实工具是平铲不是刷子，使用侧沿推球而不是托起搬运。C末态在纸边，不完全位于画出的方框内；以标记纸区域含合理边界容差为目标，不能标成严格图形内部成功。",
      "variants": [
        {
          "video_id": "E42-A",
          "variant": "A",
          "observed_demo": "把两球推到圆标记纸区域",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E42/E42_A__head.mp4",
              "sha256": "3286450a67becdb1783a7ca3016ca789f7d6ed15c8d1a17bd86390ad61d274a7",
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              "fps": 25.0,
              "duration_seconds": 94.8
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            "left_wrist": {
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              "fps": 25.0,
              "duration_seconds": 94.8
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            "right_wrist": {
              "path": "media/E42/E42_A__right_wrist.mp4",
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              "duration_seconds": 94.8
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            "multiview": {
              "path": "media/E42/E42_A__multiview.mp4",
              "sha256": "419e867b6fd98dabe303b85b5b971d9ffb198ccdd36985eb5d75a2b37ae5aff5",
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              "fps": 25.0,
              "duration_seconds": 94.8
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          }
        },
        {
          "video_id": "E42-B",
          "variant": "B",
          "observed_demo": "把两球推到三角标记纸区域",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E42/E42_B__head.mp4",
              "sha256": "ee69867d001d8f34fc8e7076f43f5e668bb9e6c0e5c44aba029697cf28d024cf",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1985,
              "fps": 25.0,
              "duration_seconds": 79.4
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            "left_wrist": {
              "path": "media/E42/E42_B__left_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1985,
              "fps": 25.0,
              "duration_seconds": 79.4
            },
            "right_wrist": {
              "path": "media/E42/E42_B__right_wrist.mp4",
              "sha256": "5bce616c40dec0247cd076a8a26a4ca969ebc5cecd8b1a605249dcd1cba8b3ae",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 79.4
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            "multiview": {
              "path": "media/E42/E42_B__multiview.mp4",
              "sha256": "a123920b036330e55a5b0b29836dad91739cfb86ea85c7849ee6eccbcbc9e1f1",
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              "width": 1440,
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              "frames": 1985,
              "fps": 25.0,
              "duration_seconds": 79.4
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          }
        },
        {
          "video_id": "E42-C",
          "variant": "C",
          "observed_demo": "把两球推到方标记纸区域",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E42/E42_C__head.mp4",
              "sha256": "2ef34d30055b794ef6fe1397f14cb34ae37a1c8ea30a25f116df5fd09456094f",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2562,
              "fps": 25.0,
              "duration_seconds": 102.48
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            "left_wrist": {
              "path": "media/E42/E42_C__left_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2562,
              "fps": 25.0,
              "duration_seconds": 102.48
            },
            "right_wrist": {
              "path": "media/E42/E42_C__right_wrist.mp4",
              "sha256": "8ef14d7f46cceeea2fb87d737908c1e009b0a171e5ae50cd2ebaebed802f60db",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2562,
              "fps": 25.0,
              "duration_seconds": 102.48
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            "multiview": {
              "path": "media/E42/E42_C__multiview.mp4",
              "sha256": "19afeb06669b3f624542acbfc23600efb0b799dd68565d09dc760dfa3238c387",
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              "frames": 2562,
              "fps": 25.0,
              "duration_seconds": 102.48
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          }
        }
      ]
    },
    {
      "id": "E43",
      "title": "用导向条让球经过图形区域",
      "category": "导向/轨迹目标",
      "inference_prompt": "按示范选择的图形区域布置导向条，使释放后的球经过该区域。",
      "evaluation_scope": "释放后真实轨迹穿越目标区域；不要求停留；不得手抓球交付。",
      "scope_note": "6 fps复查确认轨迹经过目标纸区域，不是停留；B跨区域的瞬间位于采样帧之间，保留5.67–5.83s区间。正式判定应检测穿越目标区域事件，不能要求最终停稳。另一人负责释放/倾斜起始板；仿真需独立固定的放球机构。导向条必须通过碰撞改变轨迹，不能按答案直接送球。",
      "variants": [
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          "video_id": "E43-A",
          "variant": "A",
          "observed_demo": "导向圆标记区域",
          "status": "verified_prototype",
          "views": {
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              "width": 640,
              "height": 480,
              "frames": 733,
              "fps": 25.0,
              "duration_seconds": 29.32
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            "left_wrist": {
              "path": "media/E43/E43_A__left_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 733,
              "fps": 25.0,
              "duration_seconds": 29.32
            },
            "right_wrist": {
              "path": "media/E43/E43_A__right_wrist.mp4",
              "sha256": "42e4f04a1f774fa7e9e29cc3bd8872297bb3cbdc53cccc82e07cb95f539dd061",
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              "width": 640,
              "height": 480,
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              "fps": 25.0,
              "duration_seconds": 29.32
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            "multiview": {
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              "fps": 25.0,
              "duration_seconds": 29.32
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          }
        },
        {
          "video_id": "E43-B",
          "variant": "B",
          "observed_demo": "导向三角标记区域",
          "status": "verified_prototype",
          "views": {
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              "width": 640,
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              "frames": 693,
              "fps": 25.0,
              "duration_seconds": 27.72
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            "left_wrist": {
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              "width": 640,
              "height": 480,
              "frames": 693,
              "fps": 25.0,
              "duration_seconds": 27.72
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            "right_wrist": {
              "path": "media/E43/E43_B__right_wrist.mp4",
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              "fps": 25.0,
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            "multiview": {
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          }
        },
        {
          "video_id": "E43-C",
          "variant": "C",
          "observed_demo": "导向方标记区域",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E43/E43_C__head.mp4",
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              "width": 640,
              "height": 480,
              "frames": 747,
              "fps": 25.0,
              "duration_seconds": 29.88
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            "left_wrist": {
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              "width": 640,
              "height": 480,
              "frames": 747,
              "fps": 25.0,
              "duration_seconds": 29.88
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            "right_wrist": {
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            "multiview": {
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          }
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      ]
    },
    {
      "id": "E44",
      "title": "纸板折成不同夹角",
      "category": "关节/角度类别",
      "inference_prompt": "按示范展示的夹角类别折好纸板，一面贴桌，松手后保持形状。",
      "evaluation_scope": "直角/钝角/锐角明确区分、松手后稳定；不暗设精确60/120度。",
      "scope_note": "影片没有量角器，不能从斜视画面认定精确60/120度；应定义直角/锐角/钝角关系与合理容差。实际为一块有折痕硬纸板，无独立支撑件。",
      "variants": [
        {
          "video_id": "E44-A",
          "variant": "A",
          "observed_demo": "一面贴桌，另一面竖起，形成直角",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E44/E44_A__head.mp4",
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              "fps": 25.0,
              "duration_seconds": 38.76
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            "left_wrist": {
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              "sha256": "37c3fbb22a94bb12a959519b8aceacb82edd3acea3717139a0912ed7fc629bb2",
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              "width": 640,
              "height": 480,
              "frames": 969,
              "fps": 25.0,
              "duration_seconds": 38.76
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            "right_wrist": {
              "path": "media/E44/E44_A__right_wrist.mp4",
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              "fps": 25.0,
              "duration_seconds": 38.76
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            "multiview": {
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        },
        {
          "video_id": "E44-B",
          "variant": "B",
          "observed_demo": "一面贴桌，另一面向外倾斜，形成钝角",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E44/E44_B__head.mp4",
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              "duration_seconds": 33.28
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            "left_wrist": {
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              "width": 640,
              "height": 480,
              "frames": 832,
              "fps": 25.0,
              "duration_seconds": 33.28
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            "right_wrist": {
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            "multiview": {
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              "duration_seconds": 33.28
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          }
        },
        {
          "video_id": "E44-C",
          "variant": "C",
          "observed_demo": "一面贴桌，另一面向内倾斜，形成锐角",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E44/E44_C__head.mp4",
              "sha256": "4fa1e477bf5a779676fe3ff99bd480a163a52fcf589b235c7544954128689d47",
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              "width": 640,
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              "fps": 25.0,
              "duration_seconds": 46.36
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            "left_wrist": {
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              "height": 480,
              "frames": 1159,
              "fps": 25.0,
              "duration_seconds": 46.36
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            "right_wrist": {
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            "multiview": {
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          }
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      ]
    },
    {
      "id": "E45",
      "title": "把杯中球倒入指定图形格",
      "category": "倾倒/目标选择",
      "inference_prompt": "把杯中的球全部倒入示范选择的图形格，空杯放回桌上。",
      "evaluation_scope": "全部球进目标格、杯空且释放；有实际倾倒，不能逐球抓放。",
      "scope_note": "杯中三球均进入同一格；第四个叉号格为干扰项；需杯倾斜出料而非逐球手抓。",
      "variants": [
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          "video_id": "E45-A",
          "variant": "A",
          "observed_demo": "全部倒入圆形格",
          "status": "verified_prototype",
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              "duration_seconds": 77.2
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            "left_wrist": {
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              "fps": 25.0,
              "duration_seconds": 77.2
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            "right_wrist": {
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              "duration_seconds": 77.2
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            "multiview": {
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          }
        },
        {
          "video_id": "E45-B",
          "variant": "B",
          "observed_demo": "全部倒入三角形格",
          "status": "verified_prototype",
          "views": {
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              "duration_seconds": 75.76
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              "duration_seconds": 75.76
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            "right_wrist": {
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1894,
              "fps": 25.0,
              "duration_seconds": 75.76
            },
            "multiview": {
              "path": "media/E45/E45_B__multiview.mp4",
              "sha256": "4991d81dd9f2e8ddd27b5f2e742120043e148cfd1a136ea6e537cfdc3b9ca750",
              "bytes": 3807117,
              "source": "native_synchronized_composite",
              "width": 1440,
              "height": 720,
              "frames": 1894,
              "fps": 25.0,
              "duration_seconds": 75.76
            }
          }
        },
        {
          "video_id": "E45-C",
          "variant": "C",
          "observed_demo": "全部倒入方形格",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E45/E45_C__head.mp4",
              "sha256": "ac35e7da3b7ad0fc0a8d1d753563f0ec6ae5e6433a1395f4b22b551652a17371",
              "bytes": 1841718,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2028,
              "fps": 25.0,
              "duration_seconds": 81.12
            },
            "left_wrist": {
              "path": "media/E45/E45_C__left_wrist.mp4",
              "sha256": "58267fcc2db27563ec33da8260ba9ca0fa8e2d5fb9f799cb4f95419d3e4281bb",
              "bytes": 419690,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2028,
              "fps": 25.0,
              "duration_seconds": 81.12
            },
            "right_wrist": {
              "path": "media/E45/E45_C__right_wrist.mp4",
              "sha256": "6f82e81e9eec21249a53cb0886994e98012886b365abe5e1452910c220ccb7c4",
              "bytes": 1656243,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2028,
              "fps": 25.0,
              "duration_seconds": 81.12
            },
            "multiview": {
              "path": "media/E45/E45_C__multiview.mp4",
              "sha256": "717cef239503267a26a3e3f4e1e60f67357db82ba2be63fcfeee83f615c4b78a",
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              "source": "native_synchronized_composite",
              "width": 1440,
              "height": 720,
              "frames": 2028,
              "fps": 25.0,
              "duration_seconds": 81.12
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          }
        }
      ]
    },
    {
      "id": "E46",
      "title": "平铲承托送至图形区域",
      "category": "工具承托/目标选择",
      "inference_prompt": "用平铲将黄色块送到示范选择的图形标记纸上。",
      "evaluation_scope": "搬运由铲承托、目标纸区域接收并释放；允许上铲时辅助手。",
      "scope_note": "与食物装盘题区别在目的地图形映射而非物体选择。A块跨圆纸边，不可要求整个物体处于画出的圆线内。允许一手扶块协助上铲。",
      "variants": [
        {
          "video_id": "E46-A",
          "variant": "A",
          "observed_demo": "铲起黄色块，送到圆标记纸",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E46/E46_A__head.mp4",
              "sha256": "e88ec089f001aa96d95f12acf3a8a1dae88773c4b602c0b67d34cc1a620675f2",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2001,
              "fps": 25.0,
              "duration_seconds": 80.04
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            "left_wrist": {
              "path": "media/E46/E46_A__left_wrist.mp4",
              "sha256": "f4175527dbf003d1054c5357ca5311fa26a4d6ed3be818b0b958dc2f6f524e69",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2001,
              "fps": 25.0,
              "duration_seconds": 80.04
            },
            "right_wrist": {
              "path": "media/E46/E46_A__right_wrist.mp4",
              "sha256": "b5697ef64a071faa6ad6128db78cba79f8c4f24ac8cde9c4450c115cad2e674d",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2001,
              "fps": 25.0,
              "duration_seconds": 80.04
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            "multiview": {
              "path": "media/E46/E46_A__multiview.mp4",
              "sha256": "08dbc5baebb093f213fc6f481dccef5e5ede6a9e23fc4c285ba1884024283de4",
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              "source": "derived_synchronized_composite",
              "width": 1440,
              "height": 720,
              "frames": 2001,
              "fps": 25.0,
              "duration_seconds": 80.04
            }
          }
        },
        {
          "video_id": "E46-B",
          "variant": "B",
          "observed_demo": "铲起黄色块，送到三角标记纸",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E46/E46_B__head.mp4",
              "sha256": "dd6c974403028f0df38d37d978a71edf81bdabc1a4d150229269f573925c2610",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2660,
              "fps": 25.0,
              "duration_seconds": 106.4
            },
            "left_wrist": {
              "path": "media/E46/E46_B__left_wrist.mp4",
              "sha256": "9d41d53c4d0862db129c0fbe256809d46a121f4bd6acf53cf9e97f358f1f6b8c",
              "bytes": 2005010,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2660,
              "fps": 25.0,
              "duration_seconds": 106.4
            },
            "right_wrist": {
              "path": "media/E46/E46_B__right_wrist.mp4",
              "sha256": "34ed603d649b7a6bc8d40e95806ecb3aa46de257d90b6743ef4123b7891b21ff",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2660,
              "fps": 25.0,
              "duration_seconds": 106.4
            },
            "multiview": {
              "path": "media/E46/E46_B__multiview.mp4",
              "sha256": "1c559ce124c8eb6f7f20c1806aeb190840acb7e65d7fe15e1b5b523bd87e2fa4",
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              "fps": 25.0,
              "duration_seconds": 106.4
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          }
        },
        {
          "video_id": "E46-C",
          "variant": "C",
          "observed_demo": "铲起黄色块，送到方标记纸",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E46/E46_C__head.mp4",
              "sha256": "03b602690a78c8bbcf9178b7ac748da98be6b30718013100fec901e4527d483a",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1783,
              "fps": 25.0,
              "duration_seconds": 71.32
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            "left_wrist": {
              "path": "media/E46/E46_C__left_wrist.mp4",
              "sha256": "fb0f790a6ba0df2584a172f689c8789d8a85042231e194b110b6bf1a1e4c8b24",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1783,
              "fps": 25.0,
              "duration_seconds": 71.32
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            "right_wrist": {
              "path": "media/E46/E46_C__right_wrist.mp4",
              "sha256": "3890851b758ae0dc557048e42b657a80af7974ed4e98e7453889f54823278c81",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1783,
              "fps": 25.0,
              "duration_seconds": 71.32
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            "multiview": {
              "path": "media/E46/E46_C__multiview.mp4",
              "sha256": "2319a0de2ef9eec461b6a85d6c287382332ba9b4cf16604045542131decf95d4",
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              "frames": 1783,
              "fps": 25.0,
              "duration_seconds": 71.32
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          }
        }
      ]
    },
    {
      "id": "E47",
      "title": "翻牌后选择红黑牌入盒",
      "category": "显露/红黑选择",
      "inference_prompt": "翻开左起前两张牌，按照示范中的红黑选择方式将相应牌放入盒中，其余牌保留。",
      "evaluation_scope": "只处理前两牌，选中红/黑/两张正确；后面三牌保持盖住。",
      "scope_note": "其余三张保持背面朝上；未将未选中的已翻牌翻回。颜色与固定前两位置重合，单片不能支持搜索任意未翻牌；inference应明确操作前两牌并学习红黑选择关系。",
      "variants": [
        {
          "video_id": "E47-A",
          "variant": "A",
          "observed_demo": "翻开左起前两张，只把红色牌放进盒里",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E47/E47_A__head.mp4",
              "sha256": "dcbfd12b5a3b26962e5fc9024ea024c557632bfbe045439fd9e4a05367f2ba29",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2515,
              "fps": 25.0,
              "duration_seconds": 100.6
            },
            "left_wrist": {
              "path": "media/E47/E47_A__left_wrist.mp4",
              "sha256": "c90b0e4fb7a8099fc3b0859f13d7d2a1138534bd0d117985b428587a1e0a27d7",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2515,
              "fps": 25.0,
              "duration_seconds": 100.6
            },
            "right_wrist": {
              "path": "media/E47/E47_A__right_wrist.mp4",
              "sha256": "870ff212e3bd2ac1e1e67b094839f815f49434342bcf14102f6aa8d87572e1a1",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2515,
              "fps": 25.0,
              "duration_seconds": 100.6
            },
            "multiview": {
              "path": "media/E47/E47_A__multiview.mp4",
              "sha256": "ee74240cac354a56f52e20c85875971d12685093c30f2fe890715953a83af601",
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              "source": "native_synchronized_composite",
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              "fps": 25.0,
              "duration_seconds": 100.6
            }
          }
        },
        {
          "video_id": "E47-B",
          "variant": "B",
          "observed_demo": "翻开左起前两张，只把黑色牌放进盒里",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E47/E47_B__head.mp4",
              "sha256": "448e59db575231f9a61e28b6e50920d545b4a2113c41154062cc2066eeade042",
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              "width": 640,
              "height": 480,
              "frames": 2512,
              "fps": 25.0,
              "duration_seconds": 100.48
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            "left_wrist": {
              "path": "media/E47/E47_B__left_wrist.mp4",
              "sha256": "ac159df88a25f740dccbd121f524a705b9e7982e32d7c9c397d66bc34c704a5b",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 2512,
              "fps": 25.0,
              "duration_seconds": 100.48
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            "right_wrist": {
              "path": "media/E47/E47_B__right_wrist.mp4",
              "sha256": "1296e1b3753377d53c7f1f55f0fc0dc6b82b5bf289303ba732ede2d8e3bf6025",
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              "height": 480,
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              "duration_seconds": 100.48
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            "multiview": {
              "path": "media/E47/E47_B__multiview.mp4",
              "sha256": "cf9282737eb4acacfb73b9ac87f92f4d39e7245c98c77c4c490a27015d50ad87",
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              "fps": 25.0,
              "duration_seconds": 100.48
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          }
        },
        {
          "video_id": "E47-C",
          "variant": "C",
          "observed_demo": "翻开左起前两张，两张都放进盒里",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E47/E47_C__head.mp4",
              "sha256": "923956d77211be8e9a0fd8c0427fcffcc805e5b2ac9ca9a45d82ad79524e9111",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 3035,
              "fps": 25.0,
              "duration_seconds": 121.4
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            "left_wrist": {
              "path": "media/E47/E47_C__left_wrist.mp4",
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              "height": 480,
              "frames": 3035,
              "fps": 25.0,
              "duration_seconds": 121.4
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            "right_wrist": {
              "path": "media/E47/E47_C__right_wrist.mp4",
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              "fps": 25.0,
              "duration_seconds": 121.4
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            "multiview": {
              "path": "media/E47/E47_C__multiview.mp4",
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              "duration_seconds": 121.4
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          }
        }
      ]
    },
    {
      "id": "E48",
      "title": "按数量翻牌插入卡座",
      "category": "数量/插卡",
      "inference_prompt": "按示范的数量，从左起翻开相应张数的牌，全部插入卡座，其余不动。",
      "evaluation_scope": "左起1/2/3张已翻且插入同座，其他盖住；不考花色。",
      "scope_note": "其余牌保持背面朝上；同一卡座收纳全部选中牌，学习数量而非花色。",
      "variants": [
        {
          "video_id": "E48-A",
          "variant": "A",
          "observed_demo": "从左起翻开1张牌并插入卡座",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E48/E48_A__head.mp4",
              "sha256": "1d6597e6f9a9d6197c0798de119eb40521d6a512f8dacfff9401abd2996105cd",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 1781,
              "fps": 25.0,
              "duration_seconds": 71.24
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            "left_wrist": {
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              "frames": 1781,
              "fps": 25.0,
              "duration_seconds": 71.24
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            "right_wrist": {
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            "multiview": {
              "path": "media/E48/E48_A__multiview.mp4",
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              "duration_seconds": 71.24
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          }
        },
        {
          "video_id": "E48-B",
          "variant": "B",
          "observed_demo": "从左起翻开2张牌并插入卡座",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E48/E48_B__head.mp4",
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            "left_wrist": {
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              "width": 640,
              "height": 480,
              "frames": 3576,
              "fps": 25.0,
              "duration_seconds": 143.04
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            "right_wrist": {
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            "multiview": {
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          }
        },
        {
          "video_id": "E48-C",
          "variant": "C",
          "observed_demo": "从左起翻开3张牌并插入卡座",
          "status": "verified_prototype",
          "views": {
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              "path": "media/E48/E48_C__head.mp4",
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            "left_wrist": {
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              "fps": 25.0,
              "duration_seconds": 174.68
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            "right_wrist": {
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          }
        }
      ]
    },
    {
      "id": "E49",
      "title": "三张牌按顺序分盘",
      "category": "序号→盘色",
      "inference_prompt": "翻开左起前三张牌，按示范中原始序号与盘子颜色的对应关系分放，其他牌不动。",
      "evaluation_scope": "原始第1/2/3张到对应彩盘；不按花色分类或重新定义拿起次序。",
      "scope_note": "三张牌红黑红；不能仅凭本组推断任意花色分类，按原始左起序号学习三个盘的对应关系。其余两牌不动。",
      "variants": [
        {
          "video_id": "E49-A",
          "variant": "A",
          "observed_demo": "翻开左起前三张，依次放入绿、蓝、红盘",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E49/E49_A__head.mp4",
              "sha256": "817d89b3c728c945918192741f4e5746e8a32ebe40c373db6b93fd00dd8825e6",
              "bytes": 4697556,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 4722,
              "fps": 25.0,
              "duration_seconds": 188.88
            },
            "left_wrist": {
              "path": "media/E49/E49_A__left_wrist.mp4",
              "sha256": "f430c1af1c944af2274516805f7c45c73aa08f0c3b422adc7a6a1f46653df6ce",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 4722,
              "fps": 25.0,
              "duration_seconds": 188.88
            },
            "right_wrist": {
              "path": "media/E49/E49_A__right_wrist.mp4",
              "sha256": "f11e24fe7bc9d47690fae9364650413d334cedb081b240cfe4e7756465a76e99",
              "bytes": 3426966,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 4722,
              "fps": 25.0,
              "duration_seconds": 188.88
            },
            "multiview": {
              "path": "media/E49/E49_A__multiview.mp4",
              "sha256": "077786021f36ce3d79666032d198f2623e475f80338da6ac0deb5455c1a3afcc",
              "bytes": 13217111,
              "source": "native_synchronized_composite",
              "width": 1440,
              "height": 720,
              "frames": 4722,
              "fps": 25.0,
              "duration_seconds": 188.88
            }
          }
        },
        {
          "video_id": "E49-B",
          "variant": "B",
          "observed_demo": "翻开左起前三张，依次放入绿、红、蓝盘",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E49/E49_B__head.mp4",
              "sha256": "a195ead2de615f321cb095b5eec8634b44f9be0ccdba843fda9ba4b34be3ac13",
              "bytes": 3774246,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 3905,
              "fps": 25.0,
              "duration_seconds": 156.2
            },
            "left_wrist": {
              "path": "media/E49/E49_B__left_wrist.mp4",
              "sha256": "99af32a786df102200d6e768ae8b6c4d72b4383f82916fe4297ab93c45165d36",
              "bytes": 3652416,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 3905,
              "fps": 25.0,
              "duration_seconds": 156.2
            },
            "right_wrist": {
              "path": "media/E49/E49_B__right_wrist.mp4",
              "sha256": "485b3a3bf82e6e9410a42285096b70ba7876ae97ea95994e064377d9121a7019",
              "bytes": 2982757,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 3905,
              "fps": 25.0,
              "duration_seconds": 156.2
            },
            "multiview": {
              "path": "media/E49/E49_B__multiview.mp4",
              "sha256": "b446c427aa8bca986484d0ff48e1cb8ed24c6a7504e0881cf65017622ce3382d",
              "bytes": 11796954,
              "source": "derived_synchronized_composite",
              "width": 1440,
              "height": 720,
              "frames": 3905,
              "fps": 25.0,
              "duration_seconds": 156.2
            }
          }
        },
        {
          "video_id": "E49-C",
          "variant": "C",
          "observed_demo": "翻开左起前三张，依次放入红、蓝、绿盘",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E49/E49_C__head.mp4",
              "sha256": "e9355ba856faa0d04f0bdffaf875f73d838e650317a3c9bc73ae7ce1ec7141a9",
              "bytes": 3959869,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 3956,
              "fps": 25.0,
              "duration_seconds": 158.24
            },
            "left_wrist": {
              "path": "media/E49/E49_C__left_wrist.mp4",
              "sha256": "a67c9d04bfc7a48c6d2e9440c070d7fcd925f20859b9fb066065db2882ae5c66",
              "bytes": 3678551,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 3956,
              "fps": 25.0,
              "duration_seconds": 158.24
            },
            "right_wrist": {
              "path": "media/E49/E49_C__right_wrist.mp4",
              "sha256": "1e8f06f8020576d774d1567912719053b5fae0f45357ecea09cae927cc0d2be8",
              "bytes": 2949283,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 3956,
              "fps": 25.0,
              "duration_seconds": 158.24
            },
            "multiview": {
              "path": "media/E49/E49_C__multiview.mp4",
              "sha256": "9b2614eaac8d2bf38fd30285ece5fdb2eeecaeccadefd9e7a0e1944aa6fd2a0a",
              "bytes": 12105248,
              "source": "derived_synchronized_composite",
              "width": 1440,
              "height": 720,
              "frames": 3956,
              "fps": 25.0,
              "duration_seconds": 158.24
            }
          }
        }
      ]
    },
    {
      "id": "E50",
      "title": "长尾夹夹牌送入彩盘",
      "category": "工具夹取/目标选择",
      "inference_prompt": "翻开卡片，用长尾夹将它送到示范选择的彩盘，松开夹子并放回桌面。",
      "evaluation_scope": "运输由真实夹口承载，牌释放到目标盘，夹子回桌；允许另一手扶牌。",
      "scope_note": "一手扶牌另一手夹持，允许双手准备；运输阶段靠长尾夹承载，释放后夹子回桌。夹子为长尾夹，不是镊子；牌固定为同一张，学习目标盘颜色。",
      "variants": [
        {
          "video_id": "E50-A",
          "variant": "A",
          "observed_demo": "翻牌后用长尾夹夹取，送入绿盘并释放",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E50/E50_A__head.mp4",
              "sha256": "b1b72be8862b36cd5bb788f7fe9fd035a074cc5241f841f2aea018510764bab5",
              "bytes": 2613066,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 3137,
              "fps": 25.0,
              "duration_seconds": 125.48
            },
            "left_wrist": {
              "path": "media/E50/E50_A__left_wrist.mp4",
              "sha256": "642e266e21e986e6e5253c74e9466c0132ff54332af936865074bf36b99ca2c2",
              "bytes": 1668132,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 3137,
              "fps": 25.0,
              "duration_seconds": 125.48
            },
            "right_wrist": {
              "path": "media/E50/E50_A__right_wrist.mp4",
              "sha256": "c6d082fc128f1f90c9a721e989105e6851c2fc882c6effecca0091baed8de4bb",
              "bytes": 2283894,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 3137,
              "fps": 25.0,
              "duration_seconds": 125.48
            },
            "multiview": {
              "path": "media/E50/E50_A__multiview.mp4",
              "sha256": "238d0dbb6cb60cc6100e5b9016ab6f709496d0c363855532fbecddee1ac0c3c7",
              "bytes": 7096401,
              "source": "native_synchronized_composite",
              "width": 1440,
              "height": 720,
              "frames": 3137,
              "fps": 25.0,
              "duration_seconds": 125.48
            }
          }
        },
        {
          "video_id": "E50-B",
          "variant": "B",
          "observed_demo": "翻牌后用长尾夹夹取，送入蓝盘并释放",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E50/E50_B__head.mp4",
              "sha256": "84e89f9c405dd7a445a50a2f476bf3b88d51eefcb8cb5c3f1702e29bffbe8ea7",
              "bytes": 2480300,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 3052,
              "fps": 25.0,
              "duration_seconds": 122.08
            },
            "left_wrist": {
              "path": "media/E50/E50_B__left_wrist.mp4",
              "sha256": "03ce023ba56ba842a0dccb97a575f0cbf25eb6767612c4c96b34065d058462bd",
              "bytes": 1635594,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 3052,
              "fps": 25.0,
              "duration_seconds": 122.08
            },
            "right_wrist": {
              "path": "media/E50/E50_B__right_wrist.mp4",
              "sha256": "294a51c1efed7f0c5bd328c695aee59bb85bb9b2ef5c2665d382b40dbb19772b",
              "bytes": 2169105,
              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 3052,
              "fps": 25.0,
              "duration_seconds": 122.08
            },
            "multiview": {
              "path": "media/E50/E50_B__multiview.mp4",
              "sha256": "de1912d73ed5be8af1d5e8db630f2e92d552e96e79ef8fb95da4df1eaa67ca92",
              "bytes": 6762975,
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              "fps": 25.0,
              "duration_seconds": 122.08
            }
          }
        },
        {
          "video_id": "E50-C",
          "variant": "C",
          "observed_demo": "翻牌后用长尾夹夹取，送入红盘并释放",
          "status": "verified_prototype",
          "views": {
            "head": {
              "path": "media/E50/E50_C__head.mp4",
              "sha256": "eed8951c05e4ef655a4e51a2d94bd2e04be095c5ae2d32f5bdc07735fbac11d1",
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              "fps": 25.0,
              "duration_seconds": 135.72
            },
            "left_wrist": {
              "path": "media/E50/E50_C__left_wrist.mp4",
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              "source": "native_independent_camera",
              "width": 640,
              "height": 480,
              "frames": 3393,
              "fps": 25.0,
              "duration_seconds": 135.72
            },
            "right_wrist": {
              "path": "media/E50/E50_C__right_wrist.mp4",
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              "duration_seconds": 135.72
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            "multiview": {
              "path": "media/E50/E50_C__multiview.mp4",
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          }
        }
      ]
    }
  ]
}