[postprocessor/EmbedThumbnail,postprocessor/FFmpegMetadata] Fix potential error on attaching thumbnails and info json for mkv/mka #6647
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Description of your pull request and other information
This PR fixes a potential error (therefore a hidden bug) that caused by yt-dlp has failed to pass ffmpeg a
file:
-prepended pathThis bug remained undiscovered because of "insane" filename sanitization
This log explains the situation:
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🤖 Generated by Copilot at 4c2fdf7
Summary
🐛🎞️🛠️
Fix filename escaping issues for ffmpeg postprocessors. Use
_ffmpeg_filename_argument
to escape thumbnail and info.json filenames inembedthumbnail.py
andffmpeg.py
.Walkthrough
_ffmpeg_filename_argument
method (link, link) inembedthumbnail.py
andffmpeg.py