Loop Point on Motion Menu
by Chris Lones
on
Oct 12, 2009 at 9:20:50 pm
Hi,
I am creating a proof of performance DVD for one of our sponsors, but am having an issue with setting my loop point at a particular time. When I create the motion menu, the loop point defaults to 1:17, two frames before my button animation is complete. My target loop point is 1:19 or 1:20, but any time I try to manually set the loop point, it just jumps back to 1:17. This happened when I tried to set it to any time between 1:19 and 1:27. When I tried to set it to 1:28, it jumped to 2:02. Does anyone have an idea of what is going on, or what I can do to fix it? Thanks!
Chris Lones
Director of Production
Great Lakes Loons
Re: Loop Point on Motion Menu by Jeff Bellune on Oct 12, 2009 at 10:32:05 pm
Please confirm you are talking about setting a loop point at one second and 17 frames?
If so, apparently En can only loop the menu at I-frames, which is why you have a choice of 00;01;17 or 00;02;02. Notice they are 15 frames apart, which is the GOP length.
If you're using transcoded MPEG2 files for the menu background video, I don't know any way to circumvent this behavior. It's possible that using an untranscoded .avi or .mov file would let En force a GOP at the loop point, much like it does for chapter points when the the timeline video is untranscoded.
What is going on with the background video that 2 seconds and 2 frames won't work as a loop point? It's less than half a second beyond where your button animation stops.
Re: Loop Point on Motion Menu by Jeff Bellune on Oct 12, 2009 at 10:50:06 pm
FWIW, in Encore CS4, I can set the loop point anywhere I want when a transcoded MPEG2 file is used as the menu background, even outside of GOP boundaries.
Re: Loop Point on Motion Menu by Chris Lones on Oct 13, 2009 at 1:01:55 pm
Thanks for your insight, Jeff. This is my first time using MPG-2 video as my menu backgrounds. In the past, I've been using the same codec we typically use for our scoreboard computer, which wasn't giving me the best results. However, after a quick google of GOP, it all makes sense. I made some adjustments to the animation and it's working great now. Thanks again.
Chris Lones
Director of Production
Great Lakes Loons
