[mythtv] FFmpeg sync comming

[Janne Grunau]

Hi,

I just want to give a little advance warning that I'm going to commit
FFmpeg sync in a couple of minutes.

It's not extensively tested so a couple of minor things might be broken.
Usual configurations on x86 and x86_64 should work though (including
VDPAU and XvMC playback).

Most noteable additions to libavcodec are probably RealVideo 3 and 4
support. The liba52 decoder is removed. It has the usual amount of fixes
and unsual codec support.
Importent parts still missing are AAC in LATM support and Spectral
extension EAC-3.

Janne