source code to integrate video support for H.263,H.264,MPEG4 in Video conferencing

I want to implement video conferencing functionaality in iPhone SDK.....

For this开发者_如何学Go VMobile Mobile Video Conference Call Specification:

--- for Video support we need :

1. H.263
2. H.264
3. MPEG4

Can u suggest any source code to implement the above video compressing technologies in our application

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Absolute best projects to look at.

The first one (VLC) has actually been ported to iPad (so I've heard).

http://www.videolan.org/developers/x264.html

This project implements libavcodec, which has native decode support for H264, and supports H264 encode through support of the project in the above link.

http://ffmpeg.org/

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FFmpeg is a widely used library - see discussion on codza for iPhone porting details. Do be aware that, depending on compile options, FFmpeg license is GPL or LGPL - see this SO discussion about FFmpeg distribution.