[FFmpeg-devel] Change 9963 introduces regression - start_time in asf.c

[Neil Brown]

On Sunday August 12, Reimar.Doeffinger at stud.uni-karlsruhe.de wrote:
> > The documentation says:
> >    decoding: pts of the first frame of the stream, in stream time
> >    base.
> > 
> > and while I guess that is better than nothing, it isn't a lot better
> > than nothing.
> 
> Well, what else to say? It has to be the pts that is associated with the
> first packet that is returned when reading from this stream.

But why would it ever be non-zero.  That is what I don't get.

The time stamp of the first frame in a stream, with-respect-to that
stream:  sounds like it has to be zero.

Or is it to allow different stream in one file to have different start
points?  That might make sense.... but then if there are two streams
and they both have an undefined start point.... what would you do
then?

(Sorry if I seem to be being obtuse, but while I'm no stranger to C
coding, I'm very green when it comes to media files and formats, and I
need a little help up the learning curve).

Thanks,
NeilBrown