No, you should select Open CL for your D700’s.
I actually turned Open CL off a long while back because every export was failing otherwise. (On standard 1080p videos, not this crazy 8640×1080 stuff.) Granted, I haven’t tried it since the CC 2014 update.
You are dealing with a weird frame size and a big one at that – it will come with some performance hits in order to do it.
Right, due to the large resolution, it wouldn’t surprise me that AME would want to take so long. However, Premiere takes 5 minutes or less to export the same files and with absolutely no sound issues.
You also didn’t mention the specs of your system which are critical to determining where the cause of the issue may lie.
My second post above. I have a maxed out Mac Pro 2013, so specs shouldn’t be an issue.
Lastly, you are outputting to a non-standard codec that was installed on the system. It’s great that AME registers it and can encode to it, but you can’t blame the performance of AME on a 3rd party codec.
Actually, my issue was with the ProRes files that I exported. Since I can’t watch HapQ files, I exported two files per video, one HapQ and one ProRes. This was so I could watch the ProRes files and get some reassurance of what I exported. My new system is that I export the videos individually in Premiere as ProRes, watch them, then throw those into Compressor to batch export to HapQ.
But the fact is, AME is unstable. Google it, and it’s all that comes up. Actually, a contractor just came on site today who was saying he has 24 videos (simple 1080p) to export from Premiere, and AME just keeps crashing. Sure, I don’t know his computer specs or if he even knows what he’s doing, but it seems like people using the Adobe suite are always struggling with it. The fact that Premiere has an easier time exporting than the application built for compressing and exporting videos is a little weird, isn’t it? I let it slide for a while because the Mac Pro is brand new and so is CC, but we’re pretty deep in the 2014 updates now.