Not possible.
Previously, nvenc has option called VBR2Pass. It was renamed to VBRHQ in SDK7.19
It is not exactly the two pass you are looking for.
http://forum.doom9.net/showthread.ph...01#post1792801
Think of it as single frame two pass where only data from previous frame is used for determining the next frame bit distribution.
X264 and X265 two pass work differently where all frames from beginning till the end is analysed, then the data is used to do the actual encoding process in second pass.
On your other thread, of course x265 gonna win in term of quality per file size.
x265 makes use of B-Frame.
NVENC HEVC doesn't have B-frame support.
http://forum.doom9.net/showthread.ph...93#post1780493