[FFmpeg-user] Removing a metadata tag from a specfic stream

[MediaMouth]

On Feb 6, 2021, at 15:13, Paul B Mahol <onemda at gmail.com> wrote:
> 
> I take random flac with cover art and converted it to flac with ffmpeg,
> cover art is kept.

Is there any way at all to get control over the per stream metadata -- specifically the 1st video stream which seems to be the one holding the art?

And would you know why it contains, by default, the key/value pair "comment:Other"?

Thanks.