Phil,
Have you tried exporting via the Adobe Media Encoder?
If you have a certified CUDA or OpenCL card, the scaling should then be done
on the GPU.
This means working in a 5k comp in AE, and then use AME to export to HD.
Or, if you're not doing too much fancy stuff in AE - do the whole thing in
Premiere, and get lots of real-time effects to boot, allowing for even
shorter render times.
/jarle
www.premierepro.net+---End of message---+
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