Server Version#: Windows 10 1.21.4.4079
Player Version#: Plex Web 4.51.3
I’m having an issue with hardware transcoding on an 6th Gen Intel cpu and SOME 10-Bit HEVC content. Other 10-Bit HEVC content decodes and plays perfectly.
I’ve also tried the non-playing content on a 7th Gen machine and it transcodes perfectly.
The symptoms are a very long wait before playback starts. When it starts, it’s in software Decode and Encode. On further investigation, it seems PlexTranscode.exe crashes out or times out and restarts in software only mode.
I was advised to create a new topic for this in the hopes of getting the developers attention.
I’m able to hardware transcode a lot of 10-Bit HEVC content on it, only some don’t work. Support for 10-Bit hardware decoding was introduced at some point for previous generation CPU’s.
There are two sample files included in the thread attached here. One that transcodes using HW perfectly and one that crashes out and doesn’t. I can’t see any discernable differences between the two.
Just updated to Plex server 1.22.0.4136 Beta and the problem is fixed. All the content I’ve been testing with now seems to hardware transcode without an issue.
In the release notes, the only thing I could find related to the transcoder was this.
(Transcoder) Sessions could become unresponsive after seek requests with certain timings, most commonly seen on Samsung devices (#11703)
When remote access is set to 4Mb, it transcodes perfectly using hardware, but when I set that to 8Mb is when it has a problem. Just to be clear, I’m currently offsite and remote straming.
it would be so nice to get this sorted.
It’s the only issue I have at the moment preventing me from switching to plex completely and moving away from Emby.
In the hope that someone will still give this a look. If for no other reason than the inconsistent behavior of Plex Server on 6th Gen Intel Cpu’s.
I have managed to get consistent results now across all content that wasn’t working.
If I set “Use hardware accelleration when available” to on and unselect “Use hardware-accelerated video encoding” it works perfectly. All HEVC files whether they are 8-bit, 10-bit, 4K, HDR, or any combination thereof, they all decode using hardware perfectly and quickly.
Only when I set the “Use hardware-accelerated video encoding” option back on does it become erratic and inconsistent. Working on most content, but failing on some.
Please!, Please!, Please! can someone take a look at this?
All the necessary files are available in this thread for testing, but I will gladly upload whatever else anyone needs if necessary.
