I've been doing some timelapse video by changing the playback rate (holding Ctrl and moving the end of the clip) to 4. I've never had a problem, but for some reason now it won't render those clips. Vegas keeps freezing up and crashing.

I was doing a bunch in a row today, a cake rising, clouds moving, and those rendered fine. I go to render another clip, and it starts happening. I import some previous clips that I've done the same thing with before and now they won't render either.

I didn't change any settings in Vegas, it literally has been working for months, now out of the blue it won't.

If I don't change the playback rate and just render the normal clip, it's fine and renders properly.

Any suggestions? Thanks.