QLVideo
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av1 .mkv files generated with ffmpeg are not previewable
For some reason previewing av1 .mkv videos generated with ffmpeg via the following arguments are not previewable with QLVideo:
ffmpeg -i "input.mp4" -c:v libsvtav1 -an -threads 8 -preset 5 -crf 30 "output.av1.mkv"
I can't reproduce this. Please re-test with the latest version . If you're still seeing this, please use Help → Report an Issue in the app.
Release 3 takes the new and hopefully more robust approach of extending AVFoundation rather than Quick Look, and switches to the dav1d library or VideoToolbox (M3 and later) for AV1 decode which should fix this.
Please open a new issue if the problem persists.