DV to MPEG1 Green Flash

[Ron B]

When I encode NTSC DV to 352 X 240 MPEG 1, I always get a "green flash", a green screen that "depixellates" in a second or two to normal video. At first I thought is was something to do with TMPGEnc, but it does it with the CCE SP as well.
Any idea what is causing this? Is it because I'm going from 720 X 480 to 352 X 240 and the proportions are not correct?

[edDV]

I've never seen this happen. Are you trying to do this in real time? If so it probably means the CPU is pegged trying to deinterlace and downscale.

I run DV off a cable box through a Canopus ADVC and routinely realtime encode to VCD or DVD MPeg2. DVD Mpeg2 takes a fast processor.

[Ron B]

It only happens when I go from DV to MPEG 1 at 352 X 240(making video clips for web use). If I use one of TMPGEnc VCD templates, it doesn't happen, that's why I thought I might have some of the size settings wrong. Cranks out high quality, multiple pass VBR MPEG 2 files, no problem. I'm still learning the many aspects of MPEG encoding, so operator error is always a real possibility.
I doubt if the CPU is maxxed out. The 3.4C does much tougher encoding jobs than short MPEG 1 clips. I'll have to check out the interlacing settings.