I was trying to open a matroska file with mplayer the other day and I only got video, but no sound. When I looked at the console, this caught my eye
Matroska file format detected.
Trying to force audio codec driver family libmad...
Requested audio codec family [faad] (afm=faad) not available.
Enable it at compilation.
Cannot find codec for audio format 0x4134504D.
Now, I'm confused. I had problems with mplayer a month back, so I went to their website and downloaded the "all" codec package and that seemed to fix it. I tried that again, thinking maybe the codecs were updated, but no dice. Any ideas? Thanks in advance!