| --- |
| license: other |
| pretty_name: "PointOdyssey Track4DGEN v3 training caches (conditions, target latents, text embeddings)" |
| viewer: false |
| tags: |
| - pointodyssey |
| - 4d |
| - video |
| - point-tracking |
| - 3d-bounding-boxes |
| --- |
| |
| # PointOdyssey Track4DGEN v3 training caches |
|
|
| The GPU stage's outputs for **[HugMinjun/PointOdyssey-Track4D-v3](https://huggingface.co/datasets/HugMinjun/PointOdyssey-Track4D-v3)** |
| (the CPU release `cpu-gt-v1`): memory / control conditions, target latents and caption embeddings for SanaTrack |
| training, made from [PointOdyssey](https://pointodyssey.com) ([aharley/pointodyssey](https://huggingface.co/datasets/aharley/pointodyssey), |
| revision `4a2ec949`, train split). |
|
|
| This is a derivative of PointOdyssey, not an official release. Upstream dataset terms apply; no new license is granted |
| here. Please cite PointOdyssey when you use it. |
|
|
| ## Contents |
|
|
| | | | |
| |---|---| |
| | Pairs | 1,912 memory → target pairs of 33 frames at 15 fps (`manifests/pairs.jsonl`) | |
| | Clips | 105 sequences | |
| | Conditions | 9,560 files: per pair directory, `pairs/conditions.zip` with each pair's memory latent, control latents, cameras and object paths | |
| | Target latents | 1,912 files: SANA-WM LTX-2 VAE latents `[128, 5, 22, 40]` of the 33-frame target chunk at 704 × 1280; the first temporal slice is the condition-image latent | |
| | Text | 106 files: Gemma-2-2B-it caption embeddings `[1, 300, 2304]` through the SANA-WM text pipeline, plus `negative.safetensors` | |
| | Storage | bf16 latents and embeddings (no int8 quantization) | |
| | Size | 5.1 GiB in uncompressed tar shards | |
|
|
| The condition images are not duplicated here. They are decoded from the lossless RGB `cpu-gt-v1/rgb/*.mkv`, |
| which you get from HugMinjun/PointOdyssey-Track4D-v3. |
|
|
| ## Layout |
|
|
| ``` |
| manifests/pairs.jsonl the training manifest (one row per pair) |
| manifests/plan.json the export plan |
| manifests/targets-selected.jsonl the targets the caches were built from |
| shards/clips-<h>.tar v3/clips/<h>*/... (h = first hex digit of the pair directory) |
| shards/targets-<h>.tar v3/targets/<h>*/... |
| shards/text.tar v3/text/... |
| SHA256SUMS |
| ``` |
|
|
| Tar members are relative to the PointOdyssey root. Put the CPU release in `$ROOT/release` and extract every shard into `$ROOT`: |
|
|
| ```bash |
| ROOT=/data/PointOdyssey |
| # 1. lossless RGB: the CPU release, giving $ROOT/release/cpu-gt-v1/rgb/*.mkv |
| hf download HugMinjun/PointOdyssey-Track4D-v3 --repo-type dataset --local-dir "$ROOT/release" |
| # 2. this release |
| hf download HugMinjun/PointOdyssey-Track4D-v3-training --repo-type dataset --local-dir "$ROOT/training-release" |
| (cd "$ROOT/training-release" && sha256sum -c SHA256SUMS) |
| for t in "$ROOT"/training-release/shards/*.tar; do tar -xf "$t" -C "$ROOT"; done |
| # 3. pairs.jsonl holds the producing server's absolute paths (/workspace/dataset/PointOdyssey): map them |
| sed "s#/workspace/dataset/PointOdyssey#$ROOT#g" "$ROOT"/training-release/manifests/pairs.jsonl > "$ROOT"/v3/pairs.jsonl |
| ``` |
|
|
| Training reads `$ROOT/v3/pairs.jsonl`, with target latents in `$ROOT/v3/targets` and text in `$ROOT/v3/text`. |
|
|
| ## How it was made |
|
|
| Track4DGEN `tools/pointodyssey/README.md` "Receiver: exact continuation commands" (commit `3044edaf`): |
|
|
| 1. `handoff.py localize` of the CPU release. |
| 2. Export: memory / control conditions of every selected pair (`dynamic_first_v3`, boxes `gravity_median_box_v1`), |
| `scripts/run_v3_parallel.py --windows --storage-format bf16`. All 681 windows, 0 failures. |
| 3. Target latents: `tools/sanatrack/build_pair_targets.py` (SANA-WM bidirectional VAE, `e96271d`). |
| 4. Text: `tools/sanatrack/build_text_cache.py` (gemma-2-2b-it). |
| 5. Completeness: every pair of `pairs.jsonl` has its target latent and its clip's text embedding, and the negative |
| embedding exists. |
|
|
| Produced on 4 × TITAN RTX (Turing, no native bf16). Two changes to `3044edaf` were used: |
|
|
| - The VAE and Gemma computed in **fp32** (`T4D_COMPUTE_DTYPE=fp32` in `ltx2_vae.py` and `tools/sanatrack/sanatrack/sana.py`); |
| outputs are cast to bf16 for storage as usual. Values can differ slightly from a bf16-compute run. |
| - Gravity vectors are passed to the tracking worker in positional notation (`scripts/v3_track_worker.py`), so values such |
| as `-8.2e-05` or `-0.0` are not parsed as command-line options. The values are unchanged. |
|
|
