Server Version#: 1.19.5.3021 Player Version#: Plex Web 4.37.1 I recently acquired a Quadro P400 and turned on hardware transcoding with NVENC. This works, and playing HEVC files in Plex Web (Firefox or Chromium) sucessfully transcodes them to h264 using the GPU: https://fb.hash.works/ldQuTY/ Howe…

[image] hashworks: Also we have today’s 450.57 in the Arch staging repository, I’ll try it out later. Bug is gone with today’s linux 5.7.8 and 450.57 from the Arch testing repo, works just fine! I’ll mark this as a solution then. @ChuckPa can you add nvidia 440 as buggy to the wiki page ?

I have seen a couple other threads here and there about this issue: [image] Hardware transcoding only failing in browser and PMP Desktops & Laptops Many thanks for your help! (and sorry for my late reply) Well, I tried nearly everything again… reinstalling plex, the Nvidi…

@jpurpura That would be an interesting “gotcha”, but I really doubt that a PCI x4 port would cause hardware transcoding to fail. The link speed should not interfere with hardware transcoding as you’d have to saturate many gigabytes per second over the port – and unless you’re live transcoding lossl…

Yeah I didn’t mean to link that exact post lol, but he said his was fixed with the 450 driver a bit later. Mine is actually connected via PCIE 3.0 x1 because I can’t fit a 1650 Super into my 2U chassis lol, but even that should be fine at around 1GB/sec.

I can clearly say it was not the pcie slot on my system. I thought it was, but no :smiley: Definitely, the nvidia driver fixed it for me.

An update. I spun up a brand new VM (not an LXC this time) and setup pass through for the raw PCIE device. Fresh install of Ubuntu server 20.04 with the latest plex pass beta. I tried the latest nvidia driver from their site and the nvidia-450 driver via apt. The problem persists with both drivers, …

@jpurpura It’s not a hardware issue. I guarantee if you try using an alternate web player such as synclounge , you will have no issues changing the transcoder quality. The issue lies with Plex Web Player.

Yeah you’re right, thought I’d try it since most people don’t seem to have this issue. Synclounge is working perfectly, I can switch all day as fast as I want and it just works. Really sucks that one of the most used players has this issue

I found this interesting, I noticed there is a different command for plex transcoder for playing back the same file in Synclounge vs Plex Web: [image] The middle and bottom commands are both the same file, the bottom being via Plex Web with the middle being Synclounge (the one that actually lets …

I’m experiencing this exact same issue in my test bed. Am looking to move to virtualized setup and wanted to test hardware acceleration before I did so. Setup: proxmox running on Dell R720XD Quadro P400 PCI-E passthrough to an Ubuntu 20.04 VM Plex latest from repo HW transcode works just fine o…

Converting to a lower quality fails with Hardware-Accelerated Streaming in Plex Web

Plex Media Server

jpurpura November 10, 2020, 5:30am 83

So, I’ve even gone as far as testing this on a fresh Windows 10 VM, and I get the same result. At this point I’m wondering if it could be some hardware/motherboard/bios combination issue. I’m on a Supermicro X10 board, might try changing some PCI bios settings. I did find another thread with this same issue as well:

Topic		Replies	Views
Plex hardware transcoding not working Quadro P2000 Plex Media Server server-windows , server-linux , player-windows	60	1837	December 27, 2021
Plex Suddenly Stops Hardware Transcoding Plex Media Server server-linux , apple-tv , server-truenas	69	1016	September 20, 2023
Hardware transcoding fails on web player with NVIDIA gpu Plex Media Server server-linux , plex-web	20	131	December 9, 2025
HW transcoding isn’t working smoothly with Nvidia GPU Plex Media Server server-windows	168	18054	September 8, 2020
Plex Media Server 1.16.7.1597 (Updated) - New Transcoder Preview Plex Pass Betas	143	26567	September 16, 2019

Converting to a lower quality fails with Hardware-Accelerated Streaming in Plex Web

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