Update README.md

README.md

@@ -10,7 +10,7 @@ license: other
 
 # VLAC2 Benchmark Release
 
-VLAC2 is a video-progress benchmark for long-horizon robot manipulation. This release provides benchmark JSON files with dense ground-truth progress targets, the associated raw-data archives, and a minimal frame-extraction workflow for reproducible evaluation.
+VLAC2 is a video-progress benchmark for long-horizon robot manipulation. This release provides the benchmark JSON files, the minimal raw-video subset required by the released protocol, and a lightweight frame-extraction workflow for reproducible evaluation.
 
 ## Contents
 
@@ -22,17 +22,22 @@ VLAC2 is a video-progress benchmark for long-horizon robot manipulation. This re
 - `scripts/extract_vlac2_release_raw_archives.sh`
 - `scripts/extract_vlac2_release_frames.py`
 - `scripts/vlac2_release_common.py`
-- `vlac2_release_data/vlac2_release_data_part*.tar.zst`
+- `video_archives/vlac2_benchmark_train_main_path_videos.tar`
+- `video_archives/vlac2_benchmark_test_main_path_videos.tar`
 
 ## Usage
 
-1. Unpack all raw-data archives into `vlac2_release_data/`.
+1. Unpack the benchmark video archives into `vlac2_release_data/`.
 
 ```bash
-bash scripts/extract_vlac2_release_raw_archives.sh /path/to/vlac2_release/vlac2_release_data
+bash scripts/extract_vlac2_release_raw_archives.sh \
+  /path/to/vlac2_release/video_archives \
+  /path/to/vlac2_release/vlac2_release_data
 ```
 
-2. Extract benchmark frames from the raw videos.
+If both arguments are omitted, the script defaults to `video_archives/` and extracts into `vlac2_release_data/` under the release root.
+
+2. Extract benchmark frames from the unpacked raw videos.
 
 ```bash
 python scripts/extract_vlac2_release_frames.py --release-root /path/to/vlac2_release
@@ -40,10 +45,11 @@ python scripts/extract_vlac2_release_frames.py --release-root /path/to/vlac2_rel
 
 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 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 actual 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.
+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.
 
 ## 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`.
-- The raw-video distribution and the extracted-frame cache are intentionally separated so that users can regenerate frames locally under their own storage layout.
+- 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.