DNxHR to x265 Can't create temp file.

[Selur]

I am exporting out of Premiere as DNxHR and trying to transcode to x265 with Hybrid 2018.04.08.1 on Windows 10.

Looking at the debug output the encoding call looks like this:

"C:\PROGRA~1\Hybrid\64bit\ffmpeg.exe" -y -loglevel fatal -threads 8 -i "F:\Semicolon\Renders\x264pro vr test.mp4" -map 0:0 -an -sn  -vsync 0 -pix_fmt yuv422p  -f yuv4mpegpipe - | "C:\PROGRA~1\Hybrid\64bit\x265.exe" --input - --y4m --qg-size 8 --limit-modes --no-open-gop --radl 2 --lookahead-slices 0 --crf 18.00 --cbqpoffs -2 --crqpoffs -2 --psy-rd 2.50 --rdoq-level 2 --psy-rdoq 10.00 --aq-mode 0 --deblock=-1:-1 --limit-sao --range limited --colormatrix bt709 --output "F:\Semicolon\Renders\15_10_16_2610_01.265"

the input is an mp4 container, which should not support DNxHR -> confused
What happens if you call the encoding call inside a Windows Command Prompt?

Cu Selur