I am trying to make a video by combining three different sources. The main source has a monologue and runs in the background. At certain times, the other videos pop up on the screen. I need to sync the mouth movements in the small clips with the background video.
- The two overlays have no audio. The audio tracks were deleted.
- The two overlays have transforms (offset and crop) applied.
- The two overlays are applied as Alpha Over blends.
Everything shows up just fine when rendered, but it has proven incredibly difficult to lip-sync...so I am trying to use proxies.
Proxies are generated and the base video works fine, but neither of the composite strips appear in the preview.
I have tried turning on all options I could find: prefetch, cache composite, cache raw, strip cache, per strip, per project - and have not found a combination that allows me to see the overlays with the background video.
I even tried swapping one of the overlays onto the first video channel (2 - channel 1 is the background clip's audio), but then nothing appeared in the preview.
Oh, and when looking in the file system, the proxy files for each video is present.
Even if I have to hide the background clip, I can lip sync just using the over videos and background audio.
Using Blender 2.82.