Ok, here is something new. I have been doing a series of projects with a lot of 32-bit PNG 1280x720 image sequences of late (about 300-360 frames). I like the transparency you get out of them.
This last project, I overlapped 2 sequences in the timeline. Vegas-killer. Locked up every time I tried to render over the overlapping frames. Even playback choked up. Had to go to task manager to kill Vegas and start over.
I rendered each PNG sequence seperately into MOV files, then replaced them in the orignial project. Of course, that worked to fix the problem but my transparency is not as clean.
Anyone else seen this? I wouldn't have stumbled across it if I hadn't tried to overlap to still image sequences.
Mike