ffmpeg -ss 4.6 -i 1.opus -c copy 2.opus
Cuts the file as required but it also removes the album art. Same command works for mp3 files, the album art doesn't get removed for mp3.
Edit:
I see the problem is that "Stream #0:0: Audio" is getting copied but not "Stream #0:1: Video" (which contains the album art) from 1.opus.
No improvement with
ffmpeg -ss 4.6 -i 1.opus -map 0 -map -0:v:0 -c copy 2.opus
and
ffmpeg -ss 4.6 -i 1.opus -c copy -map 0 2.opus
gives error "Unsupported codec id in stream 1".
Edit2:
ffmpeg -ss 4.6 -i 1.opus -c:a libopus -b:a 128000 -c:v libtheora -q:v 10 -c copy 2.opus
Didn't copy album art either, despite ffmpeg -codecs showing that my ffmpeg does have theora and opus codecs.
I then ran all the commands without -c copy , that didn't work either.
