[Ffmpeg-devel] ffmpeg build fixes

Diego Biurrun diego
Tue Apr 3 17:10:57 CEST 2007

On Mon, Apr 02, 2007 at 03:34:24PM +0200, Stanislav Brabec wrote:
> Diego Biurrun wrote:
> > On Mon, Apr 02, 2007 at 01:11:04PM +0200, Stanislav Brabec wrote:
> > > Floating point variant can be prepared in the same way, but I did not
> > > yet done it.
> > 
> > You mean fixed-point?  Are you planning to convert the fixed-point
> > variant of amr-nb as well?  It would be much appreciated.
> Yes. I did not plan it, but it is possible. The most complicated part is
> adapting of code to support more -D flags. I use some sed magic +
> manually written patch.

If you could do it that would be greatly appreciated.  Otherwise we will
have to drop a feature (fixed-point amr-nb support) from FFmpeg or apply
only parts of your patch.

> Can you link me to the correct 3GPP URL? There are too many specs:
> http://www.3gpp.org/ftp/Specs/html-info/26-series.htm


The following is tested to work even though there are newer ones:


> I see also amr-wb fixed point:
> http://www.3gpp.org/ftp/Specs/html-info/26273.htm

Dunno about amr-wb fixed-point.  It's mentioned in libavcodec/amr.c, but
it was never officially supported.

> Also note, that last Thursday 3GPP released a new version of AMR-WB
> codecs - 7.0.0, so amrwb needs update.

Well, "need" is an overstatement.  You are free to update your package,
but we just need something that works and then create a free decoder as
soon as we can.

> And there is also Extended Wide-Band codec - AMR-WB+:
> http://www.3gpp.org/ftp/Specs/html-info/26304.htm
> And fixed point:
> http://www.3gpp.org/ftp/Specs/html-info/26273.htm

Never heard about this one.


More information about the ffmpeg-devel mailing list