[FFmpeg-devel] libavformat/utils.c/compute_pkt_fields2: calculate dts from pts

Michael Niedermayer michaelni
Tue Oct 9 18:52:25 CEST 2007

On Tue, Oct 09, 2007 at 05:42:27PM +0100, M?ns Rullg?rd wrote:
> Michael Niedermayer wrote:
> > On Tue, Oct 09, 2007 at 04:21:12PM +0200, Dirk Musfeldt wrote:
> >> As you may have read in the mail the frames indeed have valid timestamps. It
> >> is not required for a frame to have a dts value, at least it isn't in MPEG
> >> streams.
> >
> > mpeg does require every frame which has a pts value also to have a dts value
> > actually you cannot even store one for which this is not true the mpeg syntax
> > doesnt support that
> MPEG syntax and semantics allow packets with not timestamp, only PTS or
> PTS and DTS.  If a packet has PTS but no DTS, DTS is implicitly equal to
> PTS.  

yes, did i say something which is wrong? i just meant that every packet
which has a pts also does have a dts implicitly or not, that is
theres no way to store pts=X dts=AV_NOPTS_VALUE as is

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Let us carefully observe those good qualities wherein our enemies excel us
and endeavor to excel them, by avoiding what is faulty, and imitating what
is excellent in them. -- Plutarch
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