Render video in mac

Hi, I’m trying to render a video file in OSX and I cannot put it inside an iMovie project.
Quicktime cannot open the file but VLC can.
I use ffmpeg and tried all mpeg-4 format options without success.
I tried .mp4 , .mpg , .avi and nothing works.

ANY IDEA HOW WHICH FORMAT iMovie supports??

thanks

Hi,
here is not exactly a forum for specific external tool but for Synfig.
You would have more chances asking on Google


http://www.techisky.com/tips/best-video-format-for-imovie.html