Log Message:
Update to 1.2.5:

1.2.5 was released on 2014-01-16. It is the latest stable FFmpeg
release from the 1.2 release branch, which was cut from master on
2013-03-07. Amongst lots of other changes, it includes all changes
from ffmpeg-mt, libav master of 2013-03-07, libav 9 as of 2013-03-07.