[Cellar] CodecIDs for non-standard and unregistered data formats

[Matt Gruenke <[e-mail]>]

Related to my recent query about TrackTypes for non-standard data formats,
I'd like to discuss CodecIDs.  I had previously raised this issue, on the
matroska-devel list, and was advised to take it up, here.  In the interim,
my thinking on the matter has evolved.

I wonder why not allow IANA Media Types (aka MIME types), as a sub-class of
CodecIDs?  Of course, the official Matroska CodecID would be preferred, for
all formats for which one has been designated.  However, this would enable
broader use of Matroska files, including for private, application-specific
data stream formats.

Perhaps a prefix like 'X_MEDIATYPE/' could simply be prepended to media
type names conforming with RFC 6838.  The value of TrackType would still
determine whether video, audio, or any other type-specific elements can be
used in such tracks.

Thank you for considering my suggestion.


Matt