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I need to delete some (chosen by name) metadata fields from FLV video file.
The only tool I found so far is flvmeta, but it seems it can only show and add but not remove metadata.
Requirements:
Solutions like video editors that would require to re-encode a video stream don't suit.
It is possible with FFmpeg.
The following command will remove metadata fields title and author:
ffmpeg -i x.flv -c copy -metadata title= -metadata author= y.flv
Another way is to dump metadata to file, edit and reload. How To: Dump and Load metadata with ffmpeg
To inspect metadata, just run ffmpeg -i video.flv
To completely remove metadata, use -map_metadata -1 (Strip metadata from all formats with FFmpeg)