ffmpeg + ogg vorbis: header remain warning

[rmeissn]

I've used Ear Tag to batch tag some ogg vorbis files. Ear Tag uses mutagen under the hood.

After tagging, ffmpegs ffprobe showed [ogg @ 0x556109c47000] 5929 bytes of comment header remain as a warning about the file, which wasn't there before tagging it. Over several files, the address and byte numbers change, but the warning remains.

The dev of Ear Tag requested to post the issue here. See https://gitlab.gnome.org/World/eartag/-/issues/83#note_1772588

[lazka]

This is due to tag padding: https://mutagen.readthedocs.io/en/latest/user/padding.html

mutagen/mutagen/oggvorbis.py

Line 143 in e492ebe

packets[0] = vcomment_data + b"\x00" * new_padding

If ffmpeg has a good reason why this should print a warning, or if there is a better way to handle tag padding in oggvorbis, I'm open to ideas.