David,
Is there a difference between using the standard HDV preset in Pro 1.51 and the Cineform presets?

If you not using CineForm presets you are not use Aspect HD, so yes there is a huge difference.

Perhaps I have got it wrong, but in Pro 1.51 there is a HDV preset from Cineform; when I use it, it is only not realtime.
So this preset is not using the underlying newer Cineform codec?
TIA

Only use the preset in the CineForm folder (when you select New Project.) If you don't have any presets in the CineForm folder or you are not getting real-time performance, you will need to contact tech support. For support open a trouble ticket at www.cineform.com/support

Only use the preset in the CineForm folder (when you select New Project.) If you don't have any presets in the CineForm folder or you are not getting real-time performance, you will need to contact tech support. For support open a trouble ticket at www.cineform.com/support

I have a similar issue and just opened a support ticket. I get shoddy performance using the HDV presets, and when I select the Cineform preset, I am not able to playback from my sequence at all.

Running on Dual Xeon 3.06, 2GB DDR333, ATI Radeon x850, 2x160 in RAID 0 for video drive.

I think support helped me fix the issue. I had upgraded to PP2.0, but was still having the problem. Support suggested that I go into the application and try the following:

"In the CineForm Playback Settings there is a slider control that adjusts the memory buffer. Try adjusting that one way or the other and then try playing back your timeline again."

I tried this, and it didn't seem to work. However, I exited the application, restarted PP2.0 and it was now working. I think I had turned the slider to the right (more memory). Hope this can help someone else! Thanks Cineform!