Reviving a year-old thread for a moment... I've just tested an NVENC plug-in which works in Adobe Premiere CS6/CC and Adobe Media Encoder CS6/CC.
Installed the plug-in to AME CC, and disabled CUDA acceleration in AME so it uses NVENC only. Fed AME a 118 GB ProRes file (runtime 96 minutes) which was used for a Blu-ray master, tweaked NVENC parameters a bit and set it to work on a 1080p AVC output.
Encoding rig is Windows 7 64bit with a i7-3820 CPU and a GeForce GTX 760 GPU. Encoding was done as a single pass VBR with maximum bitrate set to 28mbps and target set to 20mbps. During the process CPU load bounced around 30%, GPU load at 4-5% and GPU's VE load at 40%.
The job was completed in 46 minutes. IQ wise the result looks more than passable, although it must be said the source was shot on Arri Alexa and is generally quite low on sensor noise. That said, I noticed the image jerks slightly every now and then, which is not in the ProRes master file. Frame rate conversion was not done so it's not the culprit. The fault may lie with PowerDVD 13 which seems to be the only player on my PC capable of playing this unmuxed, raw .m4v file.
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