Add recording_stereo_20260720_174024 from capture box

.gitattributes

@@ -61,3 +61,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 recordings/recording_stereo_20240813_010455/stereo/stereo_000000.mkv filter=lfs diff=lfs merge=lfs -text
 recordings/recording_stereo_20240813_010427/stereo/stereo_000000.mkv filter=lfs diff=lfs merge=lfs -text
 recordings/recording_stereo_20240813_012308/stereo/stereo_000000.mkv filter=lfs diff=lfs merge=lfs -text
+recordings/recording_stereo_20260720_174024/stereo/stereo_000000.mkv filter=lfs diff=lfs merge=lfs -text

recordings/recording_stereo_20260720_174024/session.json

@@ -0,0 +1,5 @@
+{
+  "type": "stereo_standalone",
+  "created": 1784540424.9747028,
+  "created_iso": "2026-07-20T17:40:24"
+}

recordings/recording_stereo_20260720_174024/stereo/app.log

@@ -0,0 +1,3 @@
+[17:40:24] start mode=standalone dev=/dev/video0 live_imu=True cmd=ffmpeg -hide_banner -loglevel warning -y -f v4l2 -input_format yuyv422 -video_size 4000x1200 -framerate 30 -use_wallclock_as_timestamps 1 -i /dev/video0 -map 0:v -c:v libx264 -preset ultrafast -pix_fmt yuv420p -crf 23 -x264-params keyint=60:min-keyint=30 -f matroska /mnt/ums/records/recording_stereo_20260720_174024/stereo/stereo_000000.mkv -map 0:v -f rawvideo -pix_fmt gray pipe:1
+[17:40:24] no USB mic detected -> video only
+[17:40:37] stop reason=request dur=12.9s bytes=13410591

recordings/recording_stereo_20260720_174024/stereo/live_imu.log

@@ -0,0 +1,2 @@
+[17:40:24] python3 /mnt/ums/device-ui/scripts/stereo_live_imu.py --width 4000 --height 1200 --color 1 --out /mnt/ums/records/recording_stereo_20260720_174024/stereo/stereo_000000_imu.csv
+[live-imu] frames=315 good_edge=315 no_band=0 no_valid_window=0 samples=2603 -> /mnt/ums/records/recording_stereo_20260720_174024/stereo/stereo_000000_imu.csv

recordings/recording_stereo_20260720_174024/stereo/meta.json

@@ -0,0 +1,52 @@
+{
+  "stream": "stereo_rgb",
+  "mode": "standalone",
+  "camera": {
+    "card": "DECXIN Camera: DECXIN Camera",
+    "usb_id": "1bcf:2d50",
+    "model_hint": "Nori/Xvision DECXIN stereo (global shutter, 6-axis IMU)",
+    "device": "/dev/video0"
+  },
+  "format": {
+    "pixfmt": "yuyv",
+    "width": 4000,
+    "height": 1200,
+    "fps": 30,
+    "layout": "side_by_side",
+    "left_crop": [
+      0,
+      0,
+      2000,
+      1200
+    ],
+    "right_crop": [
+      2000,
+      0,
+      2000,
+      1200
+    ],
+    "rotation_deg": 0,
+    "rotation_note": "none"
+  },
+  "container": "stereo_000000.mkv",
+  "master_codec": "libx264",
+  "master_lossy": true,
+  "timing": {
+    "start_wallclock": 1784540424.9800942,
+    "start_iso": "2026-07-20T17:40:24",
+    "stop_wallclock": 1784540437.8358452,
+    "pts": "wallclock (-use_wallclock_as_timestamps 1)"
+  },
+  "stop_reason": "request",
+  "imu": {
+    "device": "ICM42688 (6-axis, default +/-4g / +/-1000dps)",
+    "rate_hz": 300,
+    "samples_per_frame": 10,
+    "encoding": "visual bit-code band drawn into every frame (8x8 blocks, green channel; 0-50=0, 60-220=1, >220=white). Group 0 = exposure start/end (us); groups 1..N = u32 time + 6x int16 acc/gyro, big-endian.",
+    "source": "LIVE: decoded from the UNCOMPRESSED frames during capture (stereo_live_imu.py, gray rawvideo tee) into <mkv>_imu.csv, because the lossy master destroys the in-frame code band. No MJPEG/raw master is stored.",
+    "csv": "stereo_000000_imu.csv",
+    "postprocess": "live"
+  },
+  "sdk_note": "Nori_Xvision SDK is Windows-only and not used; capture is pure V4L2/UVC, native on the RK3588/RK3576 box. IMU is decoded from the in-frame code band (vendor TimeStamp_Data_Decode).",
+  "audio": null
+}

recordings/recording_stereo_20260720_174024/stereo/stereo_000000.mkv

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:25ab4a6c0121f260520783e2361f9d5ed1a263f167b7d5e3c74c70901b7f523d
+size 13410591

recordings/recording_stereo_20260720_174024/stereo/stereo_calibration.json

@@ -0,0 +1,191 @@
+{
+  "left_intrinsics": {
+    "fx": 603.7946790204182,
+    "fy": 604.3696587078545,
+    "cx": 865.0060319680566,
+    "cy": 583.0177220344476,
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+    "reprojection_error": 0.8061354529176094
+  },
+  "right_intrinsics": {
+    "fx": 598.2829869905893,
+    "fy": 599.2622222627733,
+    "cx": 899.7491974763924,
+    "cy": 577.9169355366802,
+    "dist": [
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+    "reprojection_error": 0.6550232522618346
+  },
+  "stereo_extrinsics": {
+    "R": [
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+    ],
+    "T": [
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+      -0.6756013246768865,
+      -2.4688285879100795
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+    "baseline_mm": 60.75994428619752,
+    "reprojection_error": 0.7997437087289422
+  },
+  "rectification": {
+    "R1": [
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+      ],
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+        0.9999223085322022,
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+      [
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+        0.0032650639436008957,
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+    "R2": [
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+      [
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+        -0.0037584235035752816,
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+    ],
+    "P1": [
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+      [
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+    "P2": [
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+    "Q": [
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+  },
+  "image_size": [
+    2000,
+    1200
+  ],
+  "board_config": {
+    "chessboard": "12x9 squares, 30mm, inner corners 11x8, board 400x300mm",
+    "charuco": "12x9 squares, sq=30mm, mk=24mm, DICT_5X5_100, board 400x300mm",
+    "used": "chessboard"
+  },
+  "camera": {
+    "device": "DECXIN Stereo Camera",
+    "raw_resolution": "4000x1200",
+    "per_eye": "2000x1200",
+    "flip_180": true
+  },
+  "recording_geometry": {
+    "layout": "side_by_side",
+    "left_crop": [
+      0,
+      0,
+      2000,
+      1200
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+    "right_crop": [
+      2000,
+      0,
+      2000,
+      1200
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+    "rotation_deg": 0,
+    "rotation_note": "none",
+    "calib_source": "/mnt/ums/device-ui/config/stereo_calibration.json"
+  }
+}