>>> I would suggest that you DO create an avi-file. Make it something like >>> 0.1 fps > > A 0.1 fps AVI will only update the screen once every 10 seconds, you'll > miss > responsiveness required for subtitles Ah, ok, didn't think of that. I have never used subtitles, I wasn't aware that they would only update on frame changes. Anyway I think building an avi file is the least painful solution for this task, make it one keyframe and then, say, 4 (empty, as there's no movement) delta frames per second. Greets, Kiste