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

[Måns Rullgård]

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.  The syntax doesn't allow only DTS to be specified.

-- 
M?ns Rullg?rd
mans at mansr.com