[FFmpeg-devel] skip multiple id3v2 headers

[Aurelien Jacobs]

On Thu, Sep 09, 2010 at 03:36:04PM -0700, David Byron wrote:
> > > Fair enough.  Here are patches to read all the metadata.
> > 
> > how are "conflicts" handled? if both tags define e.g a "title", which
> > one will be exported in the end?
> 
> Conflicts aren't explicitly handled.  I used the attached program to examine
> the metadata available from each file in combinations.tar.gz.  The
> interesting metadata key in these files in TPE1.  With any luck the names of
> the files describe their contents.  They are all combinations of the files
> in testfiles.tar.gz.
> 
> Empty values or id3v2 tags that don't contain TPE1 are basically ignored.
> If multiple tags contain the same frame/key, the value that comes last in
> the file remains for access via av_metadata_get.

In this situation, I think it would be better to keep the value which
appeared first, and never overwrite it.
This can be done by simply using the AV_METADATA_DONT_OVERWRITE flag in
the av_metadata_set2() call.

Aurel