What should I do in this case
Provide more information to help us figure out the problem.
What hardware are you using?
You haven't told us what version of AE you're running. (We'd need to know the complete version number down to the last decimal.)
We don't even know what OS you're using.
You're right. I'm sory.
OS: Win7 64 bit
HP z420 WS İntel Xeon E5-1650 3,2 GHz
Nvidia Quadro K5000
But I don’t think the problem is related with the configuration. We’re using different type of computers(include Mac) here and they all have the same problem. I'm wondering, if the real time playback option is disable, while colour management is on? If so, I like to report it and expecting an improvement about it.
What hardware are you using to preview?
How are you doing the RAM Preview? What key(s) are you hitting to do it, or what are you clicking on?
of course 0 (zero) on numeric keypad
BeraT, if you disable Display Color Management (View menu > Use Display Color Management) and Mercury Transmit, do you get real-time playback during RAM preview?
Display color management and video preview in After Effects both impose a processing burden. As each frame is sent for display, additional work must be done to apply a color transformation or a dimensional transformation, respectively. If you have both color management and video preview enabled, both transformations are applied, plus an additional color transformation for the Mercury Transmit monitor. None of these transformations are cached, they are done live, on-the-fly and require additional processing at playback time.
The net result is that both color management and video preview require more processing power during playback. Larger frames, higher frame rates, and higher color bit depth increase the amount of processing power required, due to the increased memory requirements of the frames.
A faster processor would help give real-time playback more often, but you can also increase playback speed by lowering the memory requirements of the RAM preview frames: reduce the resolution in the Composition panel or the playback resolution in the Preview panel, reduce the project's color bit depth setting, or reduce the Frame Rate or increase the Skip rate in the Preview panel. Disabling the Use Display Color Management option will also help, as it removes one of the processing steps.
All of that aside, if you aren't able to achieve real-time playback when both Display Color Management and Mercury Transmit are disabled, that tells you the problem is coming from somewhere else. You'll need to provide more information about what's happening in your comp.
Thanks Tim. Normal ram preview it's ok. My problem is starting when color management is on. Thanks to you, I understood that it was not possible. I can't disable color management. Because it's necessary for this project. I turned off Mercury Transmit. It's ok. Thanks for all
Is it an absolute necessity to have color management on just to check the timing of an animation? Not really -- you're checking motion, and you can check colors after you've checked the timing.
Is it an absolute necessity to have color management on to check a color correction in real time? Not really -- you gain very little checking a color correction in real time; you're checking colors and not motion.
So while it's annoying that AE can't do both at the same time, it won't impede the quality of your work, which is the important thing.
BeraT, have you tried adjusting the settings in the Preview panel? This will reduce the memory requirements of the frames and free up processing time so you can keep both color management and video preview enabled. It's understood that you'll be making a compromise one way or another, but if a slightly lower frame rate or resolution gives you an acceptable preview, then you can continue to work with Mercury Transmit enabled. It's your choice, either way, but I want to make sure you're aware of the alternatives.