[FFmpeg-soc] H264 Timestamping

[Michael Niedermayer]

On Wed, Apr 02, 2008 at 06:39:37PM +0200, Robert Marston wrote:
> Michael Niedermayer wrote:
> > On Tue, Apr 01, 2008 at 02:10:11PM +0200, Robert Marston wrote:
> >   
> >> Re: [FFmpeg-devel] GoC 2008 and H264 SVC decoder <- Went off topic and 
> >> decided to move SoC list
> >>
> >> Michael Niedermayer wrote:
> >>     
> >>> [...]
> >>>       
> >>>> I have looked through H.222 but I am not sure where exactly you are
> >>>> referring to with how to handle H264 timestamps?
> >>>>     
> >>>>         
> >>> 2.7.5 Conditional coding of timestamps
> >>>
> >>> [...]
> >>>   
> >>>       
> >> Having trouble matching parameter names between H.222.0 and H264
> >>
> >> 2.7.5 of H222.0 uses the following terms which I am unsure to what they 
> >> relate in the H264 spec:
> >>
> >> fixed_frame_rate_flag = fixed_frame_rate flag in VUI parameters?
> >>
> >> temporal_poc_flag = ??
> >>
> >> picture_to_display_conversion_flag = ??
> >>
> >> Any ideas?
> >>     
> >
> > Common sense?
> > Hint, try to search the H.222 document for things mentioned in the H.222
> > document before trying to find them in other documents!
> >
> > [...]
> >   
> Admittedly that was rather stupid of me.
> 
> As far as I can tell the pts and dts values can be determined from 
> information such as the SEI timing and buffering messages and the SPS 
> VUI timing information.
> 
> I am trying to reference the information in the H.264 decoder from the 
> parser, h264_parse(), eg. h->sps.timing_info_present_flag.  I've tried 
> other ways of de-referencing the pointer but I don't seemed to be 
> getting the right information. Can anybody see if I am doing something 
> wrong?

There can be a parser without a decoder.

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

No human being will ever know the Truth, for even if they happen to say it
by chance, they would not even known they had done so. -- Xenophanes
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