[Andrei Girich]"I need to import 5760x3240px video file in AE. Is it possible?"
Yes. AE supports comps up to 30,000px by 30,000px. You should be aware, though, that not all containers can output arbitrary frame sizes, so you should be prepared to test your workflow from ingest to delivery.
The RAM requirements for working with extra-large comps like this are huge, so having CS5 and loads of system RAM is very, very helpful.
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