[Shawn Briscoe]

Hello Keith,

I got the same problem you’re having. From what I’ve found is that this happens when you take a movie file that you’ve imported and either shortened the file, split it, etc. To fix this you have to either use the whole movie file or clip it down to just the portion of the file you want to rotoscope with the Rotobrush. Render that out as it’s own movie file, import it into After Effects, make a composition for it, and then when you use the Rotobrush, you can then extend the span as much as you like.

I hope this helps.

Shawn