Server Version#: 1.32.6.7468 Player Version#: Any (Roku, Chromecast, LG TV) i5-8500 with 48GB of RAM - Capable of both decoding and encoding HEVC BUG #1: Hardware transcoding is not being used even though the dashboard has “hw” symbol. When looking at transcoder process -hwaccel: 0 [image] [im…

It is turned on. Is that a CPU only function? The page doesnt say… just says this: Additional driver components may be needed to support hardware transcoding with this feature enabled; see our support articles for further details. EDIT: Yup tone mapping off its using HW. how do I make it work wit…

[image] dugl: BUG #1: Hardware transcoding is not being used even though the dashboard has “hw” symbol. When looking at transcoder process -hwaccel: 0 On what are you basing your statement that hardware accelerated transcoding is not being utilized in this case? The FFMPEG command-line optio…

Oh, thanks for clarification. I thought that meant its not being used. (actually was googling documentation on this when you replied). The reason I even started investigating this is because my CPU usage goes through the roof: using multiple cores with often maxing out 1 of them to 100%. While (as…

This is what inte-gpu-top reports during playback: [image]

[image] dugl: Oh, thanks for clarification. I thought that meant its not being used. (actually was googling documentation on this when you replied). Ah, gotcha. Yeah, understandable, that zero could make it seem like it was disabling it. In case you’d like it, here’s a link to the FFMPEG do…

Well, the issue is that I cannot watch anything like this either local or remote. After a few seconds it goes to buffering and then errors out. I think the CPU cant keep up. How can subtitles be needing so much CPU? How can I make sure my video driver is up to date and that my hw acceleration is se…

[image] dugl: How can I make sure my video driver is up to date and that my hw acceleration is set up correctly? The intel_gpu_top utility already showed it was being used, as did the Plex dashboard. I don’t think there’s much doubt. Plex bundles all the drivers it requires in its Linux pac…

Yes it performs better but thats because without subtitles it does Direct Stream.

That itself is an indication of what the root of the problem is. With subtitles transcoding is required. Without it, the streams only need to be re-muxed. Try disabling Direct Streaming on the client (generally available in the client’s Plex settings). See if it transcodes then, and what the per…

Ok… maybe there is a problem. Without subtitles it does not use HW to transcode, uses CPU: [image] its same exact content I showed above with subs: [image] [image]

That is weird. You didn’t turn on HDR tone mapping, did you?

[BUG] 2 Bugs when transcoding HEVC 10bit 4k video down to h264 1080p on iGPU

Plex Media Server

ChuckPa September 15, 2023, 7:43pm 18

ALL:

From this point forward, please refer to the following thread as we recover from the problem.

Topic		Replies	Views
4K HEVC hardware transcoding barely uses GPU Plex Media Server server-linux	14	605	June 8, 2021
Problem with hw transcoding Plex Media Server server-linux	23	437	March 2, 2022
Ubuntu 24.04 & HW transcoding Plex Media Server server-linux	373	27567	September 11, 2024
Struggling with 4K HEVC HW Transcoding with GPU Plex Media Server server-windows	106	20818	March 10, 2020
Hardware Transcode Limitation Plex Media Server server-linux	7	784	September 21, 2021

[BUG] 2 Bugs when transcoding HEVC 10bit 4k video down to h264 1080p on iGPU

ALL:

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