[Ffmpeg-devel] Bug in pts computation in compute_pkt_fields() ?

[Wolfram Gloger]

Hi,

> > That is probably raw mpeg-ts, right?
> > 
> No, it is already remuxed to pes.

Ok.

> >>    /* handle wrapping */
> >>     if(st->cur_dts != AV_NOPTS_VALUE){
> >>         if(pkt->pts != AV_NOPTS_VALUE)
> >>             pkt->pts= lsb2full(pkt->pts, st->cur_dts, st->pts_wrap_bits);
> >>         if(pkt->dts != AV_NOPTS_VALUE)
> >>             pkt->dts= lsb2full(pkt->dts, st->cur_dts, st->pts_wrap_bits);
> >>     }
> >>
> >> The result is negative pts value for the packet. So I guess this is a
> >> bug in compute_pkt_fields(), or am I doing something wrong?
> > 
> > Please check that st->pts_wrap_bits is set to 60 (and not 33) if the
> > input stream is mpeg-ts.  A long time ago I had a similar problem
> > which was caused by the transport stream not being detected correctly.
> >
> 
> Hmm, you are right, st->pts_wrap_bits is 33 and it should be 60. If I
> manually set it to 60 it works as it should. How did you fix that problem?

Sorry, I was wrong -- it seems pts_wrap_bits being 33 is correct.
Can you print all the values

pkt->pts st->cur_dts st->pts_wrap_bits

so we can see what's really going on here?

Regards,
Wolfram.