[Vorbis] Free tagging

[Mark Doll]

Nic Watson wrote:
> vorbiscomment will do what you want.  The following single-line command
> will apply your tag to all of the .ogg files in the current directory
> and below.
> 
> find . -name '*.ogg' -exec vorbiscomment -a {} -t
> "DownloadedFrom=http://prc.julipan.org" \;

But if you make a mistake and want to *change* this DownloadedFrom tag later
on, things get more complicated, since the vorbiscomment utility misses the
crucial feature to *selectively* delete comments (it can only delete all
comments by using parameter -w instead of -a). Comparable tools like metaflac
can do it... Maybe a feature for a future version of the vorbiscomment tool?!

Mark.