A user on the VirtualDJ forums reported an issue where applying 'Track Cleaner' to .mp4 video files encoded with the 'dav1d AV1 decoder by VideoLAN' results in output files (.vdjedit) containing only audio, without video. This suggests a compatibility problem within VirtualDJ's processing of AV1-encoded video using a specific decoder.
The immediate issue is a broken editing workflow inside VirtualDJ: users who run Track Cleaner on certain AV1-encoded .mp4 videos end up with .vdjedit files that keep audio but lose video. That matters because it narrows the problem to a specific codec and decoder combination rather than a general file-format issue. For the streaming-video software stack, the key detail is the named pairing of VirtualDJ and VideoLAN's dav1d AV1 decoder. Watch for whether VirtualDJ documents a fix or reproduces the bug on the same codec path.
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