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

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/

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.