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Re: [Linphone-developers] H264 Video Decoder...

From: Francois-Xavier KOWALSKI
Subject: Re: [Linphone-developers] H264 Video Decoder...
Date: Tue, 31 Jul 2007 23:01:52 +0200
User-agent: Thunderbird (X11/20070716)

Nathan Allen Stratton wrote:
On Mon, 30 Jul 2007, sanil d wrote:

Hi All,

1. Any one working on H264 Video decoders for Linphone?
2. Is there any version of Linphone which supports H264 Video Decoder?

I had one of my guys working on it a few weeks ago, we got it to work, but
there is a lot more that needs to be done other then adding the CODEC to
make H.264 work in production. H.264 uses the first few RTP packets to
exchange setup information, since most endpoints are behind NAT the first
few packets are lost so you can't rely on this. In order to make this work
you need to add the SPS/PPS information in the SIP SDP. We gave up doing
that in Linphone since Windows support was not quite there and instead
added the support to OpenWengo.

Would it be possible to share some of that work? Is is based on x264 or on some other H.264 library?


Francois-Xavier "FiX" KOWALSKI     /_ __        Tel:+33 (0)4 76 14 63 27
HP OpenCall Software  - EMTS      / //_/        Fax:+33 (0)4 76 14 51 62
Media-Processing Engineering        /
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