Need help in project : Audio & Video in Linux.
 

I am working on project of audio and video in linux.
In this i have to compare different audio,video players in linux.
And need to give survey on which file formats they don't support & why.
eg.Some player don't support mp3 .
Also i have to study alsa architecture for sound drivers.
Please,suggest me some audio and video players on which i can give report.
Also suggest me some links for relevant topics.
I am not able to understand alsa so please send me any documents or tutorials if you have....

Some search strings to try on Google:

• Linux audio players
• Linux video players
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• proprietary formats legal issues