AE CC 2014 Mercury Transmit Ram Preview with AJA flickers

Hey Everyone,
I have installed the latest AJA drivers and plugins and enabled Mercury Transmit preview in AE but when I render the preview the output flickers. One frame is normal the next is darker, normal, darker etc.
Has anyone got this working yet ?
Nic

Hi Nic,
I'm not familiar with that error message. It's probably generated by the AJA Preview plug-in. Can you post a screen shot?
8-bpc vs. 16-bpc does not always affect the appearance of the comp, it depends on the source material in use and how you are manipulating it. And in any case you can always switch between 8/16-bpc to get better performance when necessary. Keep in mind that switching color depths will invalidate any cached frames.
Some facts about RAM preview playback performance with video preview in After Effects:
Enabling video preview of any form uses the CPU and memory resources of your computer, and when these are in low supply can eventually result in slow frame rates during RAM preview playback. This is because as the frames are played they are transformed on-the-fly (no caching) to the format of the video preview device. The higher the memory requirements of the frame (resolution, frame rate, color depth), the sooner you'll see the playback frame rate slow down. After Effects does not have the option of dropping frames during playback to maintain playback speed, like how Premiere Pro does.
The AJA Preview plug-in does this frame transform more efficiently than After Effects, because AJA has optimized their hardware-based playback pipeline to perform these transformations. It can still eventually be impacted by performance issues. Also, the AJA Preview plug-in currently has some limitations with scaled comp resolutions and color management, so there may be times when you may want to use Mercury Transmit for video preview instead.
When you are having problems with real-time playback with RAM preview, regardless of whether or not video preview is enabled the answer is always the same: reduce the resolution, frame rate, and/or color depth of the comp. The Resolution and Frame Rate/Skip controls in the Preview panel are intended for you to do exactly that, and the Shift+RAM Preview Options allow you to define two different sets of controls so you don't have to fiddle with those options frequently. Also, enabling color management will slow down RAM preview, as it does an on-the-fly transformation to correct the colors for screen display, similar to video preview. You can either choose View > Use Display Color Management to disable just the display correction, which will likely result in wrong color appearance of your comp, or disable color management in the Project Settings dialog altogether. Re-enable color management when you want to check the colors.
Otherwise, the best solution for slow playback in After Effects when you have a memory-intensive comp is a more powerful CPU and more RAM.

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