[FFmpeg-user] relabeling an audio track

[Ian Evans]

Just curious if there's anyway to label singly or in batch a specific
audio track in a Meg 2 file?

One of the networks in my Toronto is broadcasting it's main audio
track as "undetermined AC3 5.1ch" while the second track is "English
AC3 2ch".

MythTV automatically chooses the English track, which is the
descriptive audio track.

I'd love to change the first track in these files to "English".

Any way of doing it?

Thanks.