Finalize simplified release interface for README.md

README.md

@@ -21,37 +21,45 @@ VLAC2 is a video-progress benchmark for long-horizon robot manipulation. This re
 - `benchmark_splits/test_nonexpert_unseen/video_progress_benchmark_file.json`
 - `scripts/extract_vlac2_release_raw_archives.sh`
 - `scripts/extract_vlac2_release_frames.py`
-- `scripts/vlac2_release_common.py`
 - `data/train_videos.tar`
 - `data/test_videos.tar`
 
 ## Usage
 
-1. Unpack the benchmark video archives directly into `data/`.
+1. Unpack the video archives.
 
 ```bash
-bash scripts/extract_vlac2_release_raw_archives.sh \
-  /path/to/vlac2_release/data \
-  /path/to/vlac2_release/data
+bash scripts/extract_vlac2_release_raw_archives.sh
 ```
 
-If both arguments are omitted, the script defaults to `data/` and extracts into `data/` under the release root.
-The script expects exactly the released benchmark archives: `test_videos.tar` and `train_videos.tar` (or their `.tar.zst` variants).
+This extracts `data/test_videos.tar` and `data/train_videos.tar` into `data/`.
+To extract the raw videos elsewhere, pass a target directory:
 
-2. Extract benchmark frames from the unpacked raw videos.
+```bash
+bash scripts/extract_vlac2_release_raw_archives.sh /path/to/data
+```
+
+2. Extract frames.
+
+```bash
+python scripts/extract_vlac2_release_frames.py --data-root data
+```
+
+This writes extracted frames to `_extracted_frames/` under the release directory.
+Only the benchmark main view is extracted.
+If the raw videos were extracted elsewhere:
 
 ```bash
-python scripts/extract_vlac2_release_frames.py --release-root /path/to/vlac2_release
+python scripts/extract_vlac2_release_frames.py --data-root /path/to/data
 ```
 
-Here `--release-root` should be the top-level release directory that contains `README.md`, `benchmark_splits/`, `data/`, and `scripts/`.
-If `--output-root` is not specified, extracted frames are written to `/path/to/vlac2_release/_extracted_frames/`, which is created automatically by the script.
+3. Use the benchmark splits.
 
-3. Use the benchmark files for training or evaluation. Frame paths in the JSONs use the prefix `__VLAC2_FRAMES_ROOT__/...`. Replace `__VLAC2_FRAMES_ROOT__` with the absolute path of the extracted-frame directory. For example, if extracted frames are written to `/data/VLAC2-Benchmark/_extracted_frames`, then `__VLAC2_FRAMES_ROOT__/ARX-data/...` becomes `/data/VLAC2-Benchmark/_extracted_frames/ARX-data/...`. If you choose a custom `--output-root`, substitute that directory instead.
+Frame paths in the JSON files use the prefix `__VLAC2_FRAMES_ROOT__/...`.
+Replace `__VLAC2_FRAMES_ROOT__` with the absolute path of `_extracted_frames`.
 
 ## Notes
 
-- The benchmark JSON files are ready to use; users do not need to rebuild them.
 - A video decoder backend is required for frame extraction: `opencv-python` or `imageio`.
 - This repo only contains the raw videos required by the released benchmark splits. The full raw-data release is distributed separately.
-- The raw-video subset and the extracted-frame cache are intentionally separated so that users can regenerate frames locally under their own storage layout.
+- The benchmark JSON files are ready to use. No benchmark reconstruction is required.