[Ffmpeg-devel] Re: global headers
Wed Mar 15 22:50:25 CET 2006
On 3/15/06, Michael Niedermayer <michaelni at gmx.at> wrote:
> On Tue, Mar 14, 2006 at 12:08:50AM +0000, M?ns Rullg?rd wrote:
> > Loren Merritt <lorenm at u.washington.edu> writes:
> > > On Mon, 13 Mar 2006, Michael Niedermayer wrote:
> > >
> > >> what about letting encoders always generate global headers / set
> > >> currently it needs CODEC_FLAG_GLOBAL_HEADER to be set, which well, is
> > >> annoying from a encoder - muxer seperation POV
> > >>
> > >> objections, comments?
> > >
> > > Then it would be the muxer's job to interleave the headers into the
> > > stream if it doesn't want global headers? Are there any codecs where
> > > that doesn't consist of "prepend a copy of extradata to each keyframe"?
> > Yes, AAC (what else?). The format of the global header is different
> > from the frame header used with any of the stream formats (ADTS, ...)
> > used either raw or in program/transport streams.
> hmm, what is the difference?
> could we use the same format and convert the global one in the mov/mp4
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Reinventing the wheel certainly is annoying, but as long as all other
wheels are square...
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