XiangnanW/StreamingBench-sample332-restored

StreamingBench sample_332 Restored Video (Real-Time Visual Understanding)

This repository provides the restored, bit-verified publisher copy of sample_332 (sample_332/video.mp4 / sample_332_real.mp4) for the Real-Time Visual Understanding subset of mjuicem/StreamingBench.

1. Why the Official sample_332 File Fails to Decode

In the official mjuicem/StreamingBench dataset (commit 48872fa707124474ce4c5172ddc58efb8bc88058), archive Real-Time Visual Understanding_301-350.zip (SHA-256: d627530553789f0dc4c948fb39ce1cff3c88a9fa47aa8e385da54566f5dde10e) contains sample_332/video.mp4:

• Official archive member size: 300,095,317 bytes (~286.2 MB)
• Official ZIP CRC32: 9ccf3428
• Official SHA-256: 11fe83c605a53c781008660377d778611f26b03d54207f6573a98182c765dae6

Root Cause: The trailing 177,321,702 bytes (~169.1 MB, ~59% of the file) of the official sample_332/video.mp4 are filled with 0x00 (zero bytes) inside the upstream ZIP archive (also reported in THUNLP-MT/StreamingBench#17).

• Frames from 0s to 244s (frames 0..7312 at 29.97 fps) decode normally.
• Starting at ~245s–247s (native frame 7342+), any standard video decoder (decord, PyAV, ffmpeg, OpenCV) hits the zero-filled region and throws Invalid NAL unit size / avcodec_send_packet failed (DECORDError), causing evaluation to crash on sample_332 questions at 329s (Real-Time Visual Understanding_sample_332_4) and 500s (Real-Time Visual Understanding_sample_332_5).

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2. How sample_332 Was Restored & Verified

We located the original publisher source video (https://www.youtube.com/watch?v=_Dl3Yr1CjZY, format 137, 1920x1080, 30000/1001 fps) and performed a lossless packet-aligned stream copy (remux without re-encoding or synthesizing frames) matching the exact 18,220-frame timeline of the official container:

• Restored File: sample_332_restored_publisher_copy.mp4 (also linked under sample_332/video.mp4 and sample_332_real.mp4 for drop-in compatibility)
• File Size: 289,946,965 bytes (~276.5 MB)
• SHA-256: 09149147995b5e3cacb0c39b1da3de4f8b0adfe70bb3294f99b315884c3af3eb
• Resolution & Frame Rate: 1920x1080, 29.97002997002997 fps (30000/1001), 18,220 total frames (607.9407 seconds)
• Verification Summary (full logs in provenance/):
  1. Exact First I-Frame VCL Match: SHA-256 9fb5d4c280e26660877ebdc23dab084bf6bb0b349545e88116509540ad1396a5 matches the official file bit-for-bit.
  2. Content Identity Check (0s–244s): Across 50 checkpoints on the intact prefix (0s, 5s, ..., 240s, 244s), pHash Hamming distance = 0 and dHash Hamming distance = 0 at every single point.
  3. 100% Native PTS Alignment: All 18,220 frame presentation timestamps (PTS) in the restored file are np.array_equal to the official container's timestamp table (0.0s through 607.94s), covering all 5 StreamingBench queries (13s, 175s, 180s, 329s, 500s) without any decoder error.

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3. Usage (Drop-in Replacement)

# Download with huggingface-cli
huggingface-cli download XiangnanW/StreamingBench-sample332-restored \
  --repo-type dataset \
  --local-dir ./StreamingBench-sample332-restored

# Verify SHA-256
shasum -a 256 ./StreamingBench-sample332-restored/sample_332_restored_publisher_copy.mp4
# Expected: 09149147995b5e3cacb0c39b1da3de4f8b0adfe70bb3294f99b315884c3af3eb

# Replace the corrupted file in your StreamingBench directory:
# (a) Official StreamingBench structure (data/real/sample_332/video.mp4):
cp ./StreamingBench-sample332-restored/sample_332_restored_publisher_copy.mp4 \
   /path/to/StreamingBench/data/real/sample_332/video.mp4

# (b) Flattened / VST / lmms-eval structure (videos/sample_332_real.mp4):
cp ./StreamingBench-sample332-restored/sample_332_restored_publisher_copy.mp4 \
   /path/to/StreamingBench/videos/sample_332_real.mp4