Re: [Linphone-developers] Contract Project: 720p and 1080p support

[Jonathan Rosser]

On 20/12/12 20:52, Nathan Stratton wrote:
> On Thu, Dec 20, 2012 at 3:16 AM, Jonathan Rosser <
> address@hidden> wrote:
>
> > This is really quite trivial. Search for ENABLE_HD in
> > coreapi/linphonecore.c. It's a one line patch to turn that on.
>
> :) It looks quite trivial, but have you tried it? There are other issues of
> the code, if you ENABLE_HD you can select say 720p, but the encoded video
> is NOT 720p.

Yes - I am using it in a LAN scenario daily. I've heavily modified 
msx264 and we get low latency, 10-30Mbits of traffic and excellent 
quality video from semi-pro and professional video cameras. The coding 
quality is good enough that the limiting factor is the quality of the 
sensor/optics on the camera.

You need to do mods to msx264 to enable HD1080 encoding over a certain 
bitrate threshold - that and ENABLE_HD should get you going with the 
existing code quite easily. It is then necessary to specify the bitrate 
in the video codecs dialog to be greater than the threshold you set for 
1080 encoding in msx264.

I just wish that the L16 codec would work properly and I'd have 
uncompressed audio to go with the nice video. The VOIP codecs are pretty 
poor for non-speech content.

Hope this helps,
Jon.