I've been trying to watch an MKV file for a while, and it hasn't worked. With the Core Media Player I can get audio but no video, and the VLC media player doesn't work at all. The strange thing is that originally, I've been able to watch these files on the VLC with subtitles and it all works dandy, but one day it just didn't anymore.
I got VideoInspector, and it says I need these codecs:
Code: V_MPEG4/ISO/AVC
Full name: MPEG4 ISO advanced
and
Code: A_MPEG/L3
Full name: MPEG Audio 1, 2, 2.5
Does anyone know where I might be able to find these codecs, or what packs I could get that have these? Even if you don't know that much, if you could just help me figure out how to get my MKV files played I would be very grateful. Thankyou.

