[Mplayer-cvslog] CVS: main/DOCS/tech mpcf.txt,1.58,1.59

D Richard Felker III dalias at aerifal.cx
Wed May 5 03:27:46 CEST 2004

On Wed, May 05, 2004 at 02:31:02AM +0200, Michael Niedermayer wrote:
> > BTW, right now not much of the "flags" field is used, but if we add
> > additional flags in the future (e.g. a droppable flag for B frames and
> dropable= dts==pts && decode_delay

This is true for mpeg1/2/4, but not necessarily in general. Consider a
codec with the following frame sequence:

I0 P3 B1 B2 ...

but where B1 replaces I0 as the backward-prediction frame after it's
decoded, i.e. B2 is interpolated between B1 and P3. DTS/PTS/delay
gives you no information about independence of frames, as far as I can
tell. IMO this isn't useful to know anyway, but it's just an example
of why we might add more flags in the future...


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