Télécharge GordianKnot:
http://www.01net.com/telecharger/windows/Multimedia/encodeurs_et_decodeurs/fiches/26719.html
Le pack de codec:
http://www.01net.com/telecharger/windows/Multimedia/codecs/fiches/26944.html
Et lis ce tutorial:
http://www.pcentraide.com/index.php?showtopic=6882