Server Version#: 1.25.2.5319
Hi
I am running Plex in an LXC container on a Proxmox Hypervisor using a Xeon E3-1280 V2. In order to boost the playback performance I also have a nVidia Quadro P400, which es gettting passed through to the container. HW accelleration is activated - when I play videos, I can see the transcode session appear in nivida-smi.
While h264 playback works flawlessly under any circumstances, I am having problems with HEVC 10 bit material, which gets transcoded to h264 8 bit. For some reason I am not able to transcode it to - lets say - 4k h264 + tone mapping in at least 1x speed. But I am pretty sure the hardware should be fast enought, right? Because also if I do a a manual HEVC transcode in the container using Ubuntu ffmpeg I get around 1.8x to 2x speed. Not totally sure about how to use ffmpeg, but I was using this command:
ffmpeg -hwaccel cuvid -i input.mkv -map 0 -c:v hevc_nvenc -crf 20 -vf format=yuv420p -c:a copy -c:s copy -max_muxing_queue_size 1024 output.mkv
So cloud someone provide me with hints, why I cannot get any 4k HEVC 10 bit playback without buffering? I would be very grateful.
