[FFmpeg-devel] H.264 Lossless Decoding Patch (Profile 244) for 8x8 Intra Prediction

[Ronald S. Bultje]

Hi,

On Sat, Mar 15, 2014 at 7:43 AM, Reimar Döffinger
<Reimar.Doeffinger at gmx.de>wrote:

> On Wed, Mar 05, 2014 at 08:15:50PM +0100, Hendrik Leppkes wrote:
> > On Wed, Mar 5, 2014 at 8:14 PM, Reimar Döffinger
> > <Reimar.Doeffinger at gmx.de> wrote:
> > > On 05.03.2014, at 20:05, Jason Garrett-Glaser <darkshikari at gmail.com>
> wrote:
> > >> This will break decoding on all x264-encoded lossless files (the vast
> > >> majority of lossless files) produced in the past half decade or so.
> > >
> > > Any chance of auto-detecting this? (reliably?)
> > > Either way I guess it should be configured by a bug workaround flag as
> we do for other codecs.
> >
> > The decoder already parses the x264 version string and sets
> > H264Context->x264_build. Could make it switch implementation based on
> > that. That is assuming the person encoding didn't go out of their way
> > to purge this information.
>
> We can add an option to also force it, but in general I expect
> autodetection based on x264_build should be good enough.
> IMHO it will at least be better than not matching reference decoder.
>

Autodetection sounds good. Can someone write a patch for this?

Ronald