[Ffmpeg-devel] [FWD] [PATCH] immediate decoding of dvd stills

Michael Niedermayer michaelni
Sat Dec 2 11:09:12 CET 2006


On Fri, Dec 01, 2006 at 11:10:03PM +0100, Nico Sabbi wrote:
> Michael Niedermayer wrote:
> >
> >ok, see below, i hope it makes sense as iam tired if not ill retry tomorow
> >
> >(S=still image, E=seq end, please correct me if some assumtion is wrong)
> >
> >as stored:               I0 P3 B1 B2 P6 B4 B5 P7 S8 E9 IA PD BB BC
> >decoding with your code:    I0 B1 B2 P3 B4 B5 P6 S8    S8?IA BB BC
> >what should be output:      I0 B1 B2 P3 B4 B5 P6 P7 S8    IA BB BC
> >
> >your code looses the last frame before the still image (iam assuming that
> >this shouldnt happen, but i dunno, maybe iam wrong in what spec is the
> >still picture stuff?)
> >
> >[...]
> I didn't find a formal definition of still image in the 
> specs (there's only written that sequence_end_code 
> terminates a sequence), but they are generally coded as:
> sequence header+all sequence_extension headers
> I frame with temp_ref=0
> sequence_end

low_delay=0 for them or? if so then forcing low_delay=1 is not correct


Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

In the past you could go to a library and read, borrow or copy any book
Today you'd get arrested for mere telling someone where the library is

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