PrPro and AE. Win 7, cs5.
I have source video, subject on white background. Doesn't cover full screen. Add white matte to fill in the gap. No problem.
However, when I fade in an image over the underlying video, the matte portion fades much faster than the source video, creating a stripe. It also brings out uneven color (the yellowish part) in my white background that doesn't show up at full brightness.
So, I exported a video of all white, then imported that video back in - same problem.
I am stuck! How do y'all deal with this?
Here is what I would do in your case.
I would place the identical clip (or a copy) directly on top of the other. ( Vid 1 ,Vid 2)
I would garbage matte or linear wipe the top one.
I would motion the bottom Vid so the lower layer BG fills the upper layer BG area.