Original commit message from CVS:
* configure.ac:
Temporarily remove fPIC option for building ffmpeg
* ffmpegrev:
Switch to latest ffmpeg checkout so people can enjoy all the niceties
that have just landed (mmx optimisations for vc1 and h263, bugfixes,..)
* ext/ffmpeg/gstffmpegmux.c: (gst_ffmpegmux_collected),
(gst_ffmpegmux_change_state):
Adjust code to ffmpeg API changes.