I'm trying to get 1 movie to sit over another I have libavfilter installed but if i run the method described in vsrc_movie.c ffmpeg -i in.avi -s 240x320 -vfilters "[in]setpts=PTS-STARTPTS, [T1 ]overlay=16:16[out];movie=3200000:avi:in.avi,scale=180:144,setpts=PTS- STARTPTS[T1]" -y out.avi I get: no such filter: 'movie' Error opening filters! Also I am presuming that this will not allow transparency say in the form of a transparent flv It says that overlay does not really support alpha channels http://lists.mplayerhq.hu/pipermail/ffmpeg-user/2008-April/014859.html I can add transparency using imlib2 to attach a png but i need to get a 15 frame animation to sit over the top Can I apply a sequence of pngs to create an animation, ie put 01.png at frame 1, 02.png at frame 2 and so forth and loop this? If there's any documentation that anyone could point me to that'd be great Regards Andy