Vlc error in fedora

I have compiled vlc 2.0.5 in fedora 12 but m unable to play mkv file as it says

No suitable decoder module:
VLC does not support the audio or video format "h264". Unfortunately there is no way for you to fix this.
No suitable decoder module:
VLC does not support the audio or video format "mp4a". Unfortunately there is no way for you to fix this.

please help