According to Plex Media Server - #286 by emilybersin it appears that vc1 hw decoding should be supported on linux, however it appears to be failing on at least 1 video (that I have noticed so far).
Server Version#: 1.18.1913
Player Version#:
proxmox6/deb10
nvidia gtx1650 (will edit this later with driver version)
Please do check the drivers.
It’s seeing something but isn’t able to talk to it.
Oct 09, 2019 16:08:16.404 [0x7f8981ffb700] DEBUG - Codecs: testing vc1 (decoder) with hwdevice vaapi
Oct 09, 2019 16:08:16.404 [0x7f89e640b700] DEBUG - Auth: authenticated user 1 as TeknoJunky
Oct 09, 2019 16:08:16.404 [0x7f8981ffb700] DEBUG - Codecs: hardware transcoding: testing API vaapi
Oct 09, 2019 16:08:16.404 [0x7f8981ffb700] ERROR - [FFMPEG] - libva: va_getDriverName() failed with unknown libva error,driver_name=(null)
Oct 09, 2019 16:08:16.404 [0x7f8981ffb700] ERROR - [FFMPEG] - Failed to initialise VAAPI connection: -1 (unknown libva error).
Oct 09, 2019 16:08:16.404 [0x7f89337fe700] DEBUG - Request: [192.168.168.50:32944 (Allowed Network (Subnet))] GET /library/metadata/768156 (38 live) Signed-in Token (TeknoJunky)
Oct 09, 2019 16:08:16.404 [0x7f8981ffb700] DEBUG - Codecs: hardware transcoding: opening hw device failed - probably not supported by this system, error: Input/output error
Oct 09, 2019 16:08:16.404 [0x7f8981ffb700] DEBUG - Codecs: testing vc1 (decoder) with hwdevice nvdec
Oct 09, 2019 16:08:16.404 [0x7f8981ffb700] DEBUG - Codecs: hardware transcoding: testing API nvdec
Oct 09, 2019 16:08:16.404 [0x7f8981ffb700] DEBUG - [FFMPEG] - Loaded lib: libcuda.so.1
Oct 09, 2019 16:08:16.404 [0x7f8981ffb700] DEBUG - [FFMPEG] - Loaded sym: cuInit
Oct 09, 2019 16:08:16.404 [0x7f8981ffb700] DEBUG - [FFMPEG] - Loaded sym: cuDeviceGetCount
Oct 09, 2019 16:08:16.404 [0x7f8981ffb700] DEBUG - [FFMPEG] - Loaded sym: cuDeviceGet
Oct 09, 2019 16:08:16.405 [0x7f8981ffb700] DEBUG - [FFMPEG] - Loaded sym: cuDeviceGetAttribut
Something in here prevents FFMPEG from starting.
Huh, I’m seeing this same behavior on 1.18.0.1913 on Ubuntu LTS 18.04.2 with Kaby Lake QSV. I’m about 99% sure it was working at some point after the new transcoder released. But here is the error I’m seeing:
[FFMPEG] - Cannot load libcuda.so.1
[FFMPEG] - Could not dynamically load CUDA
I tested MPEG2 and HEVC, both used decode acceleration. I can get logs if needed.
Ok, I ran a quick test. I can’t get any of my Plex servers to hardware-decode VC1. I have two Windows 10 servers, one QSV, one Nvidia Quadro. Both give the following warning:
Codecs: avcodec_open2 returned -1 for decoder 'vc1'
And then they fall over to software decoding. I rarely decode the VC1 movies so I just hadn’t noticed. HEVC (10) and MPEG2 seem to be fine. I haven’t tested AVC.
I can PM logs if needed.
I will let them know
i’m tracking another issue too
Thank you for the reports, we are tracking this issue internally.
VC1 linux hw decoding confirmed appears to be working as of @ Version 1.18.1.1966
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