[Matroska-devel] Re: [Ffmpeg-devel] Adding matroska support to FFMPEG via libmatroska/libebml, in C++ ?
alexander.noe at s2001.tu-chemnitz.de
Tue Oct 14 16:00:01 CEST 2003
Steve Lhomme wrote:
> 2) This is only for specific audio codecs that have internal framing.
> I'm 90% sure any hardware/software player that can decode these will
> have no problem being fed with multiple frames at once. I know this is
> the case for MP3 at least. And as, so far, we are the ones who define
> how each codec should interpret data out of a Block. We can change it
> easily and that will be the standard way in matroska. And that won't
> prevent anyone from using 1frame=1block. So I see no real
> compatibility problem here.
Some hardware decoders HAVE to be fed with 2 AC3 frames at once. Mosu
the AC3 filters should be made take care of b0rked hardware.
> 1) Alex's test shows that we do have the smaller overhead. (that was
> to him before).
It was. But it is a hack, and I did wait for your permission to hack
you had said before that I can hack it, I would have done it...
> So now he cannot claim anymore than AVI can > beat MKV. (of course
> there are probably cases where it would, but not in 90% of cases)
The AVI overhead is constant at 16 bytes per chunk. Matroska has 13 for
a p-frame and 16 for a b-frame. So with video-only, it is impossible.
If you allow the same frame grouping for audio frames in Matroska as for
would not see any possibility to get the AVI overhead below the Matroska
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