For some reason, after great success earlier and with no settings changes, I'm getting awful-looking H264 compressions. There's a coming and going of bright patches and flickering, like the video's just freaking out, intermingled with perfectly fine-looking footaage.

I've got a sample of what I'm talking about, but my posting permissons indicate that I may not post attachments.

If there's someone who might be able to take a look at it and advise me, it's only a very short, SD clip.

Thank you!