Audio Video codecs

Hello there,

I'm a new comer to programmers heaven, I still have no friends here.
I thought I start making friends and getting help at the same time.

I'm in need of modules/library/source code that can convert Audio and Video encoded streams into standard format.

I'm working in Windows 2000 enviroments.
The codecs I need are the following.
Audio: G.711, G.722, G.723, G.728, G.729
Video: H.261, H.263

by standard format I mean : "wave files (.wav)" for the audio streams and "mpeg files (.mpeg .mpg)" for the video streams.

I've been told that these codecs are already programed in windows, I'm not sure about that, but that sounds logical as netmeeting uses these codecs (Netmeeting uses the H.323 protocol and those codecs are used in H.323). But I couldn't find the name of the functions that deal with converting and decoding those streams.

Thank you for your help.
P.S. If any body want's me on his Friends list I'll be glad to be so

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