[Ffmpeg-devel] ogg vorbis encode?
Sun Aug 14 16:10:00 CEST 2005
On Sun, Aug 14, 2005 at 02:28:08PM +0200, Alexander Strasser wrote:
> Rich Felker wrote:
> > On Sat, Aug 13, 2005 at 05:53:58PM +0200, Michael Niedermayer wrote:
> > > On Sat, Aug 13, 2005 at 10:03:00AM -0400, Rich Felker wrote:
> > > > On Sat, Aug 13, 2005 at 09:23:00AM -0400, Justin Ruggles wrote:
> > > [...]
> > > > > I guess that means the problem might be
> > > > > in the ogg muxer? Even doing '-acodec copy' on a valid ogg results in
> > > > > an invalid ogg.
> > > >
> > > > Probably so. Ogg has very stupid codec header storage, and the muxer
> > > > probably doesn't store the headers.. :(
> > >
> > > vorbis in ogg encoding did work fine in the past, but indeed it seems broken
> > > currently, i dont know why
> > It's because the encoder was fixed to output its headers as extradata
> > rather than (incorrectly) as audio frames, but the ogg muxer has not
> > been fixed to convert them back to packets for the broken ogg header
> > format.. At least that's my guess.
> I looked into this last night and it seems Rich is right.
> The encoding of vorbis extra data was changed recently. But
> the ogg writer wasn't updated and expects the old extradata.
> When i extract the vorbis headers from extradata like in
> vorbis.c (in case of the new extradata encoding) then it seems
> to work correctly.
> Patch attached, tho i am sure it may not be the best solution.
if it works, apply it
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