[Ffmpeg-devel] H.264 encoder

Michael Niedermayer michaelni
Wed Oct 4 13:17:00 CEST 2006


On Wed, Oct 04, 2006 at 01:02:13PM +0200, Guillaume POIRIER wrote:
> Hi Takis,
> On 6/6/06, Panagiotis Issaris <takis.issaris at uhasselt.be> wrote:
> >Hi,
> >
> >A while ago we sent a message to this mailinglist, announcing the fact
> >that we were working on a H.264 encoder for libavcodec. We have released
> >a new patch, which is available at the following location:
> >http://research.edm.uhasselt.be/h264/
> I was wondering what would it take to replace the entropy encoder
> "cabac" with FFmpeg's range coder?
> The idea would be to benefit from H264's cool features without the
> slowness of CABAC.
> Off course, the resulting streams won't be true H.264 files, but they
> should be much quicker to decode on low-end machines.
> I meant to try to do this with x264, but never had the time to do this...

ive one little request if you "invent" a h264 with range coder and that is
that it should be losslessly transcodeable to standard h264 (=so only the
CABAC coder would be replaced by our range coder without any other funny
changes) that way such non standard files could always be converted lossless
to standard h264 files

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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