michaa7,
moc & moc-ffmpeg-plugin are at version 1:2.5.0~beta2-1+b1
ffmpeg and libav-tools are at 10:2.3-dmo2
I don't use moc, but, I use mythtv and have no problem playing .mp4 files, sorry for the late reply, but, work is crazy right now, I will try moc when I get home tonight.