On Tue, Oct 02, 2018 at 19:12:25 +0200, yUGz afterLife wrote: > I tried -metadata TXXX :CATALOGNUMBER, -metadata catalognumber and all variants but the syntax is incorrect I tried $ ffmpeg -f lavfi -i anoisesrc -metadata 'TXXX:CATALOGNUMBER=23' -t 1 ~/tmp/catalog.mp3 and the resulting file seems to include the desired tag. Moritz