I just rendered a 9 minute clip that took several hours. It is one long green screen take, keyed with Keylight.. Background is a PNG., with a vignette and slight Gaussian blur. One title layer overlay.
iMac late 2013 27"
Media Encoder 2015.4
Pulling cam files from a USB 3 drive, writing to another USB 3 drive.
The cam original is H.264, 90 mbps, 1080p.
I opened the AE sequence in Media Encoder,
outputting to DNxHD 145. I have 20GB dedicated to Encoder,
and for rendering GPU Open CL is enabled. Not even sure
if that makes a difference here, just trying to provide
all the details.
Is this just the nature of the beast,
or is there a way to speed things up a bit?
Would precomping the 3 layers in the AE sequence help at all?