[Gerrit Schulze] “The files resist on an SSD connected via SATA.
But once in memory the one file is not touched anymore is’n it? Am I wrong? “
That is a pretty fast system, but with 4K it could still be a bottleneck. A fast SSD on SATA will top out around 250 MB/s — so a single frame would take 1-2 seconds to read.
AE will keep as much in RAM as it can, but with source footage that big, RAM goes fast. This is especially true with AE CS4 and earlier, which were 32-bit and therefore limited to 4GB of RAM per process. If your render is RAM-bound, CS5 might help, because it is 64-bit, and a single process could address all the RAM in your system.
When I work with high-res comps, I use make heavy use of proxies, the region of interest, and custom low resolutions and skipped frames in Shift-RAM previews.
Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
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