Consolidate episodes into a single data file and fix indexing

data/chunk-000/file-000.parquet

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-size 78788142
+oid sha256:db526679ba1d39069faf06505a272a279dc47d2510e11ef435c64e3fc0853abf
+size 78487960

data/chunk-000/file-001.parquet

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-size 20025808

data/chunk-000/file-002.parquet

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-version https://git-lfs.github.com/spec/v1
-oid sha256:96656269c5f12b1c548834fe1639a4fbc0475834514853b26c340e20b7db1382
-size 20025999

data/chunk-000/file-003.parquet

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-version https://git-lfs.github.com/spec/v1
-oid sha256:76277e51003ddfe4c135739ecb4972efa10826bb44a298a20a4ca4c8d0e6549a
-size 18761270

meta/episodes/chunk-000/file-000.parquet

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-size 298730
+oid sha256:e698fd78f882044fe06f0f84d398f6101e2a38f6bc572f348cd6a1175c997e44
+size 298704

meta/info.json

@@ -1,117 +1,117 @@
 {
-  "codebase_version": "v3.0",
-  "robot_type": "unknown",
-  "total_episodes": 800,
-  "total_frames": 20000,
-  "total_tasks": 1,
-  "chunks_size": 1000,
-  "fps": 15,
-  "splits": {
-    "train": "0:800"
-  },
-  "data_path": "data/chunk-{chunk_index:03d}/file-{file_index:03d}.parquet",
-  "video_path": "videos/{video_key}/chunk-{chunk_index:03d}/file-{file_index:03d}.mp4",
-  "features": {
-    "observation.image": {
-      "dtype": "image",
-      "shape": [
-        84,
-        84,
-        3
-      ],
-      "names": [
-        "height",
-        "width",
-        "channel"
-      ],
-      "fps": 15.0
+    "codebase_version": "v3.0",
+    "fps": 15,
+    "features": {
+        "observation.image": {
+            "dtype": "image",
+            "shape": [
+                84,
+                84,
+                3
+            ],
+            "names": [
+                "height",
+                "width",
+                "channel"
+            ],
+            "fps": 15.0
+        },
+        "observation.state": {
+            "dtype": "float32",
+            "shape": [
+                4
+            ],
+            "names": {
+                "motors": [
+                    "motor_0",
+                    "motor_1",
+                    "motor_2",
+                    "motor_3"
+                ]
+            },
+            "fps": 15.0
+        },
+        "action": {
+            "dtype": "float32",
+            "shape": [
+                3
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+            "names": {
+                "motors": [
+                    "motor_0",
+                    "motor_1",
+                    "motor_2"
+                ]
+            },
+            "fps": 15.0
+        },
+        "episode_index": {
+            "dtype": "int64",
+            "shape": [
+                1
+            ],
+            "names": null,
+            "fps": 15.0
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+        "frame_index": {
+            "dtype": "int64",
+            "shape": [
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+            "names": null,
+            "fps": 15.0
+        },
+        "timestamp": {
+            "dtype": "float32",
+            "shape": [
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+            "names": null,
+            "fps": 15.0
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+        "next.reward": {
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+            "shape": [
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+            "names": null,
+            "fps": 15.0
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+        "next.done": {
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+            "shape": [
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+            "names": null,
+            "fps": 15.0
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+        "index": {
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+            "shape": [
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+            "names": null,
+            "fps": 15.0
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+        "task_index": {
+            "dtype": "int64",
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+            "names": null,
+            "fps": 15.0
+        }
     },
-    "observation.state": {
-      "dtype": "float32",
-      "shape": [
-        4
-      ],
-      "names": {
-        "motors": [
-          "motor_0",
-          "motor_1",
-          "motor_2",
-          "motor_3"
-        ]
-      },
-      "fps": 15.0
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-    "action": {
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-      "shape": [
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-      "names": {
-        "motors": [
-          "motor_0",
-          "motor_1",
-          "motor_2"
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-      "fps": 15.0
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-    "episode_index": {
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-      "fps": 15.0
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-    "frame_index": {
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-      "names": null,
-      "fps": 15.0
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-    "task_index": {
-      "dtype": "int64",
-      "shape": [
-        1
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-      "names": null,
-      "fps": 15.0
+    "total_episodes": 800,
+    "total_frames": 20000,
+    "total_tasks": 1,
+    "chunks_size": 1000,
+    "data_files_size_in_mb": 100,
+    "video_files_size_in_mb": 500,
+    "data_path": "data/chunk-{chunk_index:03d}/file-{file_index:03d}.parquet",
+    "video_path": "videos/{video_key}/chunk-{chunk_index:03d}/file-{file_index:03d}.mp4",
+    "robot_type": "unknown",
+    "splits": {
+        "train": "0:800"
     }
-  },
-  "data_files_size_in_mb": 100,
-  "video_files_size_in_mb": 500
-}
+}