[FFmpeg-user] Metadata muxer/demuxer documentation?

[Tristan Trutna]

To answer my own question:

Extracting a ffmetadata file goes as follows:

$ ffmpeg -i INPUT -f ffmetadata OUTPUT
i.e.
$ ffmpeg -i test.mp3 -f ffmetadata metadata.txt


Reinserting ffmetadata:

$ ffmpeg -i INPUT -i INPUT_FFMETADATAFILE -map_metadata 0:1 OUTPUT
i.e.
$ ffmpeg -i test.mp3 -i metadata.txt -map_metadata 0:1 -acodec libfaac
test.m4a