[FFmpeg-devel] [PATCH] h264 bitstream filter

[Michael Niedermayer]

Hi

On Tue, Sep 04, 2007 at 02:40:50PM +0200, Benoit Fouet wrote:
> Michael Niedermayer wrote:
> > Hi
> >
> > On Tue, Sep 04, 2007 at 02:35:01PM +0200, Benoit Fouet wrote:
> >   
> >> Michael Niedermayer wrote:
> >>     
> >>> Hi
> >>>
> >>> On Tue, Sep 04, 2007 at 09:10:43AM +0200, Benoit Fouet wrote:
> >>>   
> >>>       
> >>>> Loren Merritt wrote:
> >>>>     
> >>>>         
> >>>>> On Mon, 3 Sep 2007, Trent Piepho wrote:
> >>>>>
> >>>>>   
> >>>>>       
> >>>>>           
> >>>>>> In the standard, it says stuff like:
> >>>>>>
> >>>>>> "Annex B \n Byte stream format"
> >>>>>> "B.1 Byte stream NAL unit syntax and semantics"
> >>>>>> "B.2 Byte stream NAL unit decoding process"
> >>>>>>
> >>>>>> That phase "Byte stream NAL unit" is used over and over.  So maybe
> >>>>>> something like bsnal or bsNAL?
> >>>>>>     
> >>>>>>         
> >>>>>>             
> >>>>> "Byte stream NAL unit" is a specific piece of the format. "Annex B byte 
> >>>>> stream" is the name of the format as a whole, which I would abbreviate 
> >>>>> "Annex B".
> >>>>>
> >>>>>   
> >>>>>       
> >>>>>           
> >>>> updated patch attached, which also takes advantage of the brand new
> >>>> close filter function :)
> >>>>     
> >>>>         
> >>> doesnt the code miss reformating slices and other multiple nal units
> >>> per frame?
> >>>
> >>>   
> >>>       
> >> i was thinking that the filter received nal units, not frames.
> >> am i wrong ?
> >>     
> >
> > it should receive frames but it would be best if it would work with
> > both frames as well as nal units ...
> >
> >   
> 
> that means input has to be parsed, or ?
> is there such a parser ?

?

if you get nal units you output nal units
if you get frames you output frames
just change the headers from len to 001

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

Those who are too smart to engage in politics are punished by being
governed by those who are dumber. -- Plato 
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