I´m having problem encoding with hardware accelereted encoding. I got a 4k stream that´s very laggy. My cpu is running at close to 100% and my gpu only about 10%. Can it be that audio takes so mutch cpu capacity? My speccs are:
Intel i7-66700k@4GHz
Nvidia geforce gtx 980
Running from a fast ssd and 32GB memory
I’m running i6-6700 and same issue with my 4K transcoding. I don’t have an external
GPU yet. I’m told my that it’s not good to transcode 4K. Keep a separate folder/file for 4K and only play on 4K devices. Try playing 1080p file and transcoding it. It will say (hw) on the dashboard if using the GPU successfully. If it’s using the CPU it is using the software.
That’s great that it’s running on the HW, but it’s not supposed to according everyone else. You NEVER transcode 4K. It’s a No-No. (I still try it too)
@magasinet and @rmoran99
Neither of your CPU, or GPU support hardware 4k/hdr hevc DEcoding, that is why your cpu gets overloaded and you get buffering/stuttering.
You need a 7000 series intel cpu + 600 series integrated gpu, or an nvidia card new enough to support hevc decoding (generally 1050 or higher).
on your current systems, you should avoid 4k transcoding, you can do this by keeping 4k content in a separate library, or by using plex’s labels feature to restrict them from remote/non-4k users.
otherwise, you will have to buy newer hardware that supports the transcoding you want to do.
before the recent tone mapping feature was added, even with supported hardware, transcoding 4k hdr would result in washed out colors on most clients.
now plex server can provide better color for converted hdr, but you still need hardware that is powerful enough.
with supported hardware, you will see (HW) on both lines, like this image
thanks for the info! But how do I know what kind of 4k movies i don´t need to transcode? I want to wath it on my LG 50LA660V and I dont understand what I can play on it without encoding. Both video and audio needs to match?
this isn’t a 4k tv, so you are better off not ripping or downloading 4k content, unless you have a 4k tv that you can watch it on.
there is ZERO benefit in trying to use 4k on non-4k devices.
Soz, that was my old tv! My tv model is lg oled55b6v and it is a 4k tv
playing 4k content on non-4k devices will always transcode the video.
so, you either need newer hardware (cpu and/or gpu), or you need to avoid playing 4k on non-4k devices.
Yes I know that. But my tv is 4k and i want to watch movies in 4k only on the tv. But I don’t understand what kind of 4k movies i can play on my tv with the plex app without transcoding.
well that depends entirely on the tv, did you read the FAQ thread linked above?
it provides a whole ton of info and discussion on 4k usage.
my guess is simply that you are trying to play truehd audio and/or subtitles, and its causing the server to transcode, and your hardware isn’t new/powerful enough.
if reading the thread doesn’t help you figure out the problem, then we need some clean logs from during when the problem occurs.
make sure DEBUG server logs are enabled
make sure VERBOS server logs are DISABLED
that should get us started, but if that doesn’t help figure it out, then we may also need the client logs.
client log info
server log info
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