When doing a Rapid Preview in After Effects, I don get a realtime preview, but instead a very jerky preview. How can I fix this?
Check the Rapid Preview settings in the Echo Fire control panel and make sure you have assigned the Rapid Preview Cache Folder to a disk array capable of maintaining the data rates required by your video card. On the Macintosh, also check the control panel to make sure you have selected disk-based previews. It may seem counterintuitive, but RAM is slower than disk in this case, and the RAM-based preview can’t maintain the required datarates. This is because transferring data from RAM to the D1 Desktop card involves the CPU, whereas transferring from the disk array to the card is a direct, high-speed DMA operation. Echo Fire for Windows always uses disk-based previews.
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