[Ffmpeg-devel] Re: [PATCH] seeking in GXF

Reimar Döffinger Reimar.Doeffinger
Wed Aug 2 18:54:22 CEST 2006

On Tue, Aug 01, 2006 at 11:13:56PM +0200, Baptiste Coudurier wrote:
> Demuxer must set time rate if it knows it and GXF specifies it. Some
> codecs can't set the frame (MJPEG for example) cause it simply does not
> have this information.

Well, I think as you have seen in our discussion on IRC, GXF does
specify it sometimes. Somewhat. Maybe.
Or more precisely: There is a precise fps value in the special tag for
it. But that is not necessarily present. The one if UMF is always
present, but not necessarily precise (24 fps and 23.98 fps is coded the
same way).
I just don't really like the idea of overwriting the correct value that
the MPEG2-decoder would detect by a possible imprecise value from the
demuxer. And I also don't like special-casing MPEG2.
So you think that just setting e.g. 24 fps even if it might really
be 23.98 fps would be best?

Reimar D?ffinger

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