Organize Track 2 trajectory variants

#4
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  1. README.md +1 -118
  2. track_1/README.md +120 -52
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README.md CHANGED
@@ -1,120 +1,3 @@
1
  ---
2
- license: cc-by-4.0
3
- pretty_name: Video to Data (V2D) Challenge Dataset
4
- tags:
5
- - robotics
6
- - robot-learning
7
- - manipulation
8
- - human-object-interaction
9
- - motion-capture
10
- - video
11
- - 4d-reconstruction
12
- - reinforcement-learning
13
- - egocentric-video
14
  ---
15
-
16
- # Video to Data (V2D) Challenge Dataset
17
-
18
- ## Dataset Description
19
-
20
- The **Video to Data (V2D) Challenge Dataset** is an NVIDIA-developed benchmark for studying the complete path from human demonstration video to physics-grounded robot behavior. It supports three coupled challenge tracks over shared manipulation tasks: **4D human-object interaction reconstruction**, **robotic grounding**, and **end-to-end egocentric transfer**.
21
-
22
- - [Challenge website](https://nvidia-isaac.github.io/video_to_data/v2d_challenge/)
23
- - [Starter toolkit](https://github.com/nvidia-isaac/video_to_data)
24
- - [Dataset repository](https://huggingface.co/datasets/nvidia/video_to_data_challenge)
25
- - Contact: [v2d_challenge@nvidia.com](mailto:v2d_challenge@nvidia.com)
26
-
27
- ## Challenge Tracks
28
-
29
- | Track | Input | Goal | Evaluation summary |
30
- | --- | --- | --- | --- |
31
- | **Track 1: Reconstruction** | Monocular third-person RGB video | Recover the human, object pose, and object geometry as a metric 4D human-object interaction scene in a consistent world frame | Reconstruction accuracy and physical plausibility relative to the multi-view reference |
32
- | **Track 2: Robotic Grounding** | Third-person 4D human-object interaction trajectories at different input-noise tiers | Retarget the demonstration and learn an executable policy for the robotic embodiment and simulator | Object-tracking performance at each input tier |
33
- | **Track 3: Egocentric** | Egocentric human demonstration video | Produce an executable robot policy through either an explicit reconstruct-and-retarget pipeline or an implicit end-to-end method | Final results produced with the official evaluation script |
34
-
35
- ### Track 1: Reconstruction
36
-
37
- Track 1 evaluates monocular 4D human-object interaction reconstruction under challenging conditions including occlusion, bimanual coordination, and long-horizon manipulation.
38
-
39
- Participants reconstruct:
40
-
41
- - the human body and hands;
42
- - object pose trajectories;
43
- - object geometry; and
44
- - metric scale.
45
-
46
- Track 1 is evaluated along two equally weighted axes:
47
-
48
- 1. **Accuracy**
49
- - Chamfer distance to the multi-view human mesh
50
- - Chamfer distance to the multi-view object mesh
51
- 2. **Physical plausibility**
52
- - Human-joint acceleration error
53
- - Object acceleration error
54
- - Contact penetration error
55
-
56
- ### Track 2: Robotic Grounding
57
-
58
- Track 2 measures how upstream reconstruction quality affects human-to-robot transfer and downstream policy learning.
59
-
60
- The dataset provides three input tiers:
61
-
62
- 1. **Tier 1 — Clean multi-view capture:** an upper-bound input for upstream reconstruction.
63
- 2. **Tier 2 — Synthetic corruption:** trajectories with jitter, dropout, and contact errors sampled from Track 1 error distributions.
64
- 3. **Tier 3 — Off-the-shelf reconstruction:** trajectories produced by current reconstruction methods.
65
-
66
- Each tier is scored separately. Metrics include **AUC**, **SP-SR**, **MP-SR**, and **MPPE**, as defined by the challenge evaluation protocol.
67
-
68
- ### Track 3: Egocentric
69
-
70
- Track 3 evaluates the full pipeline from egocentric human video to robot behavior. The track is method-agnostic: participants may use an explicit reconstruction-and-retargeting pipeline, an end-to-end model, a pretrained vision-language-action model, a world-action model, or a hybrid approach.
71
-
72
- The NVIDIA-collected data includes human-object manipulation recordings and associated assets made available for development and evaluation. Depending on the released split, these assets may include:
73
-
74
- - egocentric videos;
75
- - motion-capture trajectories;
76
- - sequence metadata;
77
- - textured 3D object meshes; and
78
- - URDF object descriptions.
79
-
80
- Use `eval_e2e.py` from the starter toolkit to package the required reconstructions and recorded policy evaluations.
81
-
82
- ## Download
83
-
84
- Install the Hugging Face Hub client:
85
-
86
- ```bash
87
- python -m pip install -U "huggingface_hub"
88
- ```
89
-
90
- Download the complete dataset repository while preserving its file structure:
91
-
92
- ```bash
93
- hf download nvidia/video_to_data_challenge \
94
- --repo-type dataset \
95
- --local-dir ./video_to_data_challenge
96
- ```
97
-
98
- If authentication is requested, first run:
99
-
100
- ```bash
101
- hf auth login
102
- ```
103
-
104
- The same operation can be performed from Python:
105
-
106
- ```python
107
- from huggingface_hub import snapshot_download
108
-
109
- snapshot_download(
110
- repo_id="nvidia/video_to_data_challenge",
111
- repo_type="dataset",
112
- local_dir="./video_to_data_challenge",
113
- )
114
- ```
115
-
116
- Large assets are stored using Hugging Face's large-file infrastructure. Make sure sufficient disk space is available before downloading the complete repository.
117
-
118
- ## Support
119
-
120
- For challenge or dataset questions, contact [v2d_challenge@nvidia.com](mailto:v2d_challenge@nvidia.com). For software issues, use the issue tracker in the [Video to Data repository](https://github.com/nvidia-isaac/video_to_data/issues).
 
1
  ---
2
+ license: apache-2.0
 
 
 
 
 
 
 
 
 
 
 
3
  ---
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
track_1/README.md CHANGED
@@ -1,79 +1,147 @@
1
  # Track 1
2
 
3
- Video-only single-view human-object interaction sequences for object tracking. Track 1
4
- contains 30 selected episodes from the FORM-HOI multiview recordings. Each episode provides
5
- one static third-person RGB video, its physical camera view, the target object identifier
6
- and prompt, and the original action description.
 
7
 
8
  | | |
9
  |---|---|
10
- | Episodes | 30 |
11
- | Frames | 16,563 (360–877 per episode, mean 552) |
12
  | Rate | 30 fps |
13
- | Tasks | 22 original action descriptions |
14
- | Cameras | 1 stream per episode, 30 clips, 4 distinct physical cameras |
15
- | Target objects | 10 |
 
16
 
17
  ## Layout
18
 
19
  ```
20
  track_1/
21
- ├── data/chunk-000/episode_0000NN.parquet LeRobot frame indexes only
22
  ├── videos/chunk-000/observation.images.exo_camera/episode_0000NN.mp4
 
23
  └── meta/
24
- ├── info.json LeRobot v2.1 schema and counts
25
- ├── episodes.jsonl episode lengths and action descriptions
26
- ├── episodes_metadata.jsonl sequence, camera, and target-object metadata
27
- ├── episodes_stats.jsonl video and index statistics
28
- └── tasks.jsonl original action descriptions
29
  ```
30
 
31
- ## Per-episode metadata
 
 
 
 
 
32
 
33
- Each record in `meta/episodes_metadata.jsonl` contains only:
 
 
 
 
 
34
 
35
- - `episode_index`
36
- - `sequence_id`
37
- - `camera`
38
- - `object`
39
- - `object_prompt`
40
- - `video_key`
41
 
42
- The video path is determined from `meta/info.json` using `episode_index` and `video_key`.
43
- The `object` and `object_prompt` fields identify the object to track. The corresponding
44
- action description is resolved through the episode's `task_index` and
45
- `meta/tasks.jsonl`.
46
 
47
- ## Video
48
 
49
- Videos are 1536×1152 H.264 (`yuv420p`) at 30 fps with no audio. They are byte-identical
50
- copies of the selected source videos and were not re-encoded.
51
 
52
- | Camera | Episodes |
53
- |---|---:|
54
- | `back_stereo_camera_left` | 5 |
55
- | `front_stereo_camera_left` | 9 |
56
- | `left_stereo_camera_left` | 11 |
57
- | `right_stereo_camera_left` | 5 |
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
58
 
59
- ## LeRobot v2.1 indexes
60
 
61
- The per-episode Parquet files contain only the structural columns required to align video
62
- frames with LeRobot episode and task metadata:
 
 
63
 
64
- - `timestamp`
65
- - `frame_index`
66
- - `episode_index`
67
- - `index`
68
- - `task_index`
69
- - `next.done`
70
 
71
- No human pose, body reconstruction, object pose, visibility annotation, or object mesh is
72
- included in the current revision.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
73
 
74
- Episode indexes follow the 30-sequence selection order. Each of the 10 target objects has three episodes.
75
 
76
- RGB statistics for retained videos are preserved. For new videos, channel statistics use
77
- uniformly sampled frames (sample count `min(N, max(100, min(10000, floor(N**0.75))))`),
78
- area-downsampled to 154×116 and normalized to [0, 1]. This downsampling is used only
79
- for statistics; the distributed videos retain their original bytes and resolution.
 
 
1
  # Track 1
2
 
3
+ Single-view human-object interaction sequences from the FORM-HOI multiview export
4
+ (rig `nova_hawk`, scene `sc_office_4exo_1`). Every episode has **one static third-person
5
+ RGB video**, the full-body SOMA-X / MHR reconstruction, and the 6-DoF pose of one tracked
6
+ object with a textured mesh. Object poses are **`world_T_object` in the source OpenCV world
7
+ frame**, so placing the mesh at a logged pose recovers its reconstructed location.
8
 
9
  | | |
10
  |---|---|
11
+ | Episodes | 67 |
12
+ | Frames | 48,846 (245–1034 per episode, mean 729) |
13
  | Rate | 30 fps |
14
+ | Tasks | 62 distinct instructions |
15
+ | Cameras | 1 stream per episode, 67 clips, 4 distinct physical cameras |
16
+ | Objects | 33, each with one textured mesh |
17
+ | Subjects | 14 |
18
 
19
  ## Layout
20
 
21
  ```
22
  track_1/
23
+ ├── data/chunk-000/episode_0000NN.parquet human + object pose, one row per frame
24
  ├── videos/chunk-000/observation.images.exo_camera/episode_0000NN.mp4
25
+ ├── mesh/<object>/<object>.glb textured mesh, one per object
26
  └── meta/
27
+ ├── info.json schema, feature shapes/names, counts, tasks, objects
28
+ ├── episodes.jsonl episode lengths and tasks
29
+ ├── episodes_metadata.jsonl episode → source sequence, camera, object, mesh, person
30
+ ├── episodes_stats.jsonl per-episode feature statistics
31
+ └── tasks.jsonl task descriptions
32
  ```
33
 
34
+ ## Video
35
+
36
+ Each episode ships exactly one camera under the single feature key `observation.images.exo_camera`
37
+ (1536×1152, h264, yuv420p, 30 fps).
38
+ Which physical camera it is varies per episode and is recorded in
39
+ `meta/episodes_metadata.jsonl` (`camera`) and in every parquet's schema metadata (`camera`):
40
 
41
+ | Camera | Episodes |
42
+ |---|---|
43
+ | `back_stereo_camera_left` | 11 |
44
+ | `front_stereo_camera_left` | 15 |
45
+ | `left_stereo_camera_left` | 30 |
46
+ | `right_stereo_camera_left` | 11 |
47
 
48
+ Files are byte-identical copies of the source H.264 videos; no re-encoding was performed.
49
+ Video is **frame-exact with the parquets**: row *i* is frame *i*, verified on every clip.
 
 
 
 
50
 
51
+ No camera intrinsics or extrinsics are included. The source calibration sequence id is kept
52
+ per episode (`calibration_sequence`) but is not a calibration matrix.
 
 
53
 
54
+ ## Parquet columns
55
 
56
+ One row per frame. Fixed-size float32 lists; multi-dimensional tensors are flattened
57
+ row-major and their shape is declared in `meta/info.json` under `features`.
58
 
59
+ ### Human, SOMA-X parameters
60
+
61
+ | Column | Shape | Meaning |
62
+ |---|---|---|
63
+ | `observation.human.pose` | 231 | SOMA-X local joint rotations, axis-angle radians, 77 joints x 3 |
64
+ | `observation.human.translation` | 3 | SOMA-X root translation, metres |
65
+ | `observation.human.identity_coeffs` | 45 | SOMA-X identity coefficients (MHR identity model) |
66
+ | `observation.human.scale_params` | 68 | SOMA-X scale parameters |
67
+ | `observation.human.bone_length_flexibles` | 6 | SOMA-X flexible bone lengths |
68
+
69
+ `observation.human.pose` holds 77 local joint rotation vectors (axis-angle, radians). The
70
+ joint order is the `names` list of that feature in `meta/info.json` (`<joint>.rx/.ry/.rz`).
71
+
72
+ ### Human, MHR reconstruction outputs
73
+
74
+ | Column | Shape | Meaning |
75
+ |---|---|---|
76
+ | `observation.mhr.global_rot` | 3 | root orientation, axis-angle rotation vector (radians) |
77
+ | `observation.mhr.body_pose_params` | 133 | MHR body pose parameters |
78
+ | `observation.mhr.hand_pose_params` | 108 | MHR hand pose parameters (both hands) |
79
+ | `observation.mhr.scale_params` | 28 | MHR skeleton scale parameters |
80
+ | `observation.mhr.shape_params` | 45 | MHR identity/shape coefficients |
81
+ | `observation.mhr.model_params` | 204 | concatenated MHR model parameter vector as emitted by the reconstruction pipeline |
82
+ | `observation.mhr.cam_t` | 3 | predicted root translation in the source world frame (metres) |
83
+ | `observation.mhr.keypoints_3d` | 70x3 | 70 predicted 3D keypoints, xyz metres, source world frame |
84
+ | `observation.mhr.joint_coords` | 127x3 | 127 MHR joint positions, xyz metres, source world frame |
85
+ | `observation.mhr.joint_global_rots` | 127x3x3 | 127 MHR joint global rotation matrices, row-major |
86
+
87
+ Each feature entry in `meta/info.json` also records `source_key`, the key of the tensor in
88
+ the source `mhr_params_mv.pt` it was copied from.
89
 
90
+ ### Object
91
 
92
+ | Column | Shape | Meaning |
93
+ |---|---|---|
94
+ | `observation.object.pose` | 7 | `[x, y, z, qw, qx, qy, qz]`, metres, **quaternion w-first**, `world_T_object` |
95
+ | `observation.object.visible` | 1 | false where the source pose was invalid; pose is then all zeros |
96
 
97
+ Each episode tracks exactly one object. Its name is in the parquet schema metadata
98
+ (`objects`, `object_mesh`) and in `meta/episodes_metadata.jsonl` (`object`, `mesh`). The
99
+ mesh is stored once per object: `white_desk` → `mesh/white_desk/white_desk.glb`. Frames with
100
+ an invisible object: episode 2 (1 frame), episode 47 (1 frame).
 
 
101
 
102
+ ### Index columns
103
+
104
+ `timestamp` (float32, `frame_index / 30`), `frame_index`, `episode_index`, `index`
105
+ (global), `task_index`, `next.done` (true on the last frame of an episode).
106
+
107
+ ## Quickstart
108
+
109
+ ```python
110
+ import json
111
+ import numpy as np
112
+ import pyarrow.parquet as pq
113
+
114
+ t = pq.read_table("data/chunk-000/episode_000000.parquet")
115
+ md = {k.decode(): v.decode() for k, v in t.schema.metadata.items()}
116
+ print(md["camera"], md["objects"], md["object_mesh"])
117
+
118
+ def col(name): # (frames, D) float32
119
+ return t[name].combine_chunks().flatten().to_numpy().reshape(t.num_rows, -1)
120
+
121
+ obj_pose = col("observation.object.pose") # x y z qw qx qy qz
122
+ visible = t["observation.object.visible"].to_numpy(zero_copy_only=False)
123
+ human_pose = col("observation.human.pose").reshape(-1, 77, 3)
124
+ joint_rots = col("observation.mhr.joint_global_rots").reshape(-1, 127, 3, 3)
125
+ ```
126
+
127
+ ### Placing the mesh at a pose
128
+
129
+ ```python
130
+ import trimesh
131
+ from scipy.spatial.transform import Rotation
132
+
133
+ mesh = trimesh.load(md["object_mesh"], process=False).to_geometry()
134
+ x, y, z, qw, qx, qy, qz = obj_pose[visible][100]
135
+ T = np.eye(4)
136
+ T[:3, :3] = Rotation.from_quat([qx, qy, qz, qw]).as_matrix() # scipy is xyzw
137
+ T[:3, 3] = [x, y, z]
138
+ mesh.apply_transform(T)
139
+ ```
140
 
141
+ ## Provenance
142
 
143
+ Built from the FORM-HOI `sc_office_4exo_1/data_export_3` export: `soma_params.npz`,
144
+ `mhr_params_mv.pt`, `poses.npy`, `pose_valid_mask.npy`, `object_mesh/output_aligned.glb`,
145
+ `hoi_metadata.yaml` and the selected `videos/<camera>.mp4` of each sequence. Every copied
146
+ file was verified against the sha256 in the source `commit.json`. Episode order follows the
147
+ selection list; `episodes_metadata.jsonl` maps each episode back to its source sequence id.
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