Lumetri effect slow with openCL

Question

Hi,
I'm running Premiere Pro cc 2014 (8.0.1) on a new Mac Pro (3 GHz 8-Core, 64GB ram, 2x AMD FirePro D700 6144 MB).
I'm having trouble with the Lumetri effect (custom grades created in speedgrade and roundtripped back to Premiere) and OpenCL. Whenever I have the effect on the playback framerate drops if I have OpenCL enabled. When using the software only engine the playback is fine.
I've seen a few similar posts from a while back but not solution other than turning OpenCL off. Any new work arounds at all?
cheers
R

Answer 1

Yes, you can apply LUT's directly in PrPro. The way I found to is to get the free RedGiant "Lut Buddy" program ...
http://www.redgiant.com/products/all/magic-bullet-colorista-free/
It only lists compatability up through CS6 but works every day in my latest-CC version of PrPro just fine. Available both for windows and macs, once installed it gets onto the "Effects" pane's "Video Effects" section as "Magic Bullet Colorista". Click on that, the only sub-listing is "LUT Buddy". Double-click on that, and up in the source-area go to the "Effects" tab, and you'll see " fx LUT Buddy" there. Off to the right of that line is an icon sort of like an arrow pointing at a dialog box. Click that icon, you get a really old-style dialog that allows you to import LUT's, and navigate to them. You can of course then use controls of that effect in PrPro to control it's ... strength? ... and stuff.
Sometimes LUT's that I can apply in Sg and come back to PrPro within the saved project don't like working direct in PrPro, and I've had a couple that work here but Sg doesn't like. Most LUT's do work, however.
You can also use this sub-program over in Ae, to copy the effect of the visual controls there into a LUT or to do a "draw pattern" of your program monitor and then a "read pattern" to create a LUT directly from your work in Ae.
Neil