[kkroening/ffmpeg-python/issues/463] add basic metadata file support #814
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grantnegri
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@kkroening Is this library still actively maintained? My use case involves manipulating file metadata, which is currently broken due to the issue outlined in #463. This PR appears to be relatively small in size, so is it possible to review and merge? |
AlexStansfield
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Nov 18, 2025
The ffmpeg-python library has a known bug that prevents map_metadata and map_chapters from working correctly. Since the fix hasn't been merged in over 2 years, we're switching to subprocess exclusively. ## Issue ffmpeg-python doesn't properly handle -map_metadata and -map_chapters parameters. When passed as kwargs, they don't get translated to the correct FFmpeg command-line arguments. Issue: kkroening/ffmpeg-python#463 PR (unmerged): kkroening/ffmpeg-python#814 ## Changes ### Simplified decrypt_aaxc() - Removed ffmpeg-python implementation attempt - Removed fallback pattern (_decrypt_aaxc_subprocess helper) - Now uses subprocess directly for all decryption - Added comment explaining why we don't use ffmpeg-python - Cleaner, simpler code with no hybrid approach needed ### Updated imports - Removed ffmpeg import from src/downloader.py - Removed ffmpeg-python from requirements.txt ## Benefits 1. **Reliable**: Subprocess approach is proven to work 2. **Simpler**: No fallback logic, no hybrid approach 3. **Maintainable**: Direct FFmpeg command construction is easier to debug 4. **Cleaner dependencies**: One less package to maintain The subprocess implementation gives us precise control over the FFmpeg command and handles all our use cases correctly (metadata, chapters, cover art embedding).
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Fixes /issues/463.
Check if the stream name has already been specified as a metadata stream. there are no guarantees that the user has done this correctly.