Unable to select "too low" of quality of video

[DestinyGrey]

Hello,

I've just set up my new Ubuntu server machine, including setup of my new GPU in it (a 1070). To test it out, I tried lowering the quality of video within Jellyfin. However, I quickly found an oddity- when switching quality to 720p, Jellyfin could generally render the video. But switching to 480p would not load at all, and in fact made the Jellyfin player client crash. Only changing the quality back to a higher resolution, or just streaming direct would fix it. Testing it in Edge doesn't crash it (thankfully) but it will pause playback until I change it back to the higher quality options.


My immediate suspicions are that I've set up hardware acceleration wrong, or I'm not understanding something about the quality options. I've gone through the entire Jellyfin NVENC guide for Linux virtualization in setting it up, though mistakes can always happen.

I am running a docker container on Ubuntu Server. Here are the details:

Version: 10.8.13
Operating System: Linux
Architecture: X64

I appreciate any help on this matter, and am willing to provide as much information as possible.

[TheDreadPirate]

Did you follow instructions here?

https://jellyfin.org/docs/general/admini...ualization

Can you provided screenshots of Dashboard > Playback? And share your ffmpeg log with us.

[DestinyGrey]

I did follow the instructions there, though I can't help but feel I missed something. I've since disabled hardware acceleration because of the issues I have been facing with it, though now none of my shows will even work with direct playback, which is disconcerting. I think I've done something really stupid or something to muck it all up.

Here's my ffmpeg log:

/videos/10bf3772-c072-3144-12a1-2c77098a8251/hls1/main/64.ts

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/usr/lib/jellyfin-ffmpeg/ffmpeg -analyzeduration 200M -ss 00:03:12.000 -init_hw_device cuda=cu:0 -filter_hw_device cu -hwaccel cuda -hwaccel_output_format cuda -threads 1 -autorotate 0 -i file:"/data/movies2/Constantine.2005.1080p.BluRay.DTS.x264-HiDt.mkv" -autoscale 0 -map_metadata -1 -map_chapters -1 -threads 0 -map 0:0 -map 0:1 -map -0:s -codec:v:0 h264_nvenc -preset p1 -b:v 7360000 -maxrate 7360000 -bufsize 14720000 -profile:v:0 high -g:v:0 72 -keyint_min:v:0 72 -vf "setparams=color_primaries=bt709:color_trc=bt709:colorspace=bt709,scale_cuda=format=yuv420p" -codec:a:0 libfdk_aac -ac 6 -ab 640000 -copyts -avoid_negative_ts disabled -max_muxing_queue_size 2048 -f hls -max_delay 5000000 -hls_time 3 -hls_segment_type mpegts -start_number 64 -hls_segment_filename "/config/data/transcodes/15bc8c78772821eb8845a5c8954ddb33%d.ts" -hls_playlist_type vod -hls_list_size 0 -y "/config/data/transcodes/15bc8c78772821eb8845a5c8954ddb33.m3u8"


ffmpeg version 5.1.4-Jellyfin Copyright © 2000-2023 the FFmpeg developers
built with gcc 11 (Ubuntu 11.4.0-1ubuntu1~22.04)
configuration: --prefix=/usr/lib/jellyfin-ffmpeg --target-os=linux --extra-libs=-lfftw3f --extra-version=Jellyfin --disable-doc --disable-ffplay --disable-ptx-compression --disable-static --disable-libxcb --disable-sdl2 --disable-xlib --enable-lto --enable-gpl --enable-version3 --enable-shared --enable-gmp --enable-gnutls --enable-chromaprint --enable-libdrm --enable-libass --enable-libfreetype --enable-libfribidi --enable-libfontconfig --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libopenmpt --enable-libdav1d --enable-libwebp --enable-libvpx --enable-libx264 --enable-libx265 --enable-libzvbi --enable-libzimg --enable-libfdk-aac --arch=amd64 --enable-libsvtav1 --enable-libshaderc --enable-libplacebo --enable-vulkan --enable-opencl --enable-vaapi --enable-amf --enable-libmfx --enable-ffnvcodec --enable-cuda --enable-cuda-llvm --enable-cuvid --enable-nvdec --enable-nvenc
libavutil 57. 28.100 / 57. 28.100
libavcodec 59. 37.100 / 59. 37.100
libavformat 59. 27.100 / 59. 27.100
libavdevice 59. 7.100 / 59. 7.100
libavfilter 8. 44.100 / 8. 44.100
libswscale 6. 7.100 / 6. 7.100
libswresample 4. 7.100 / 4. 7.100
libpostproc 56. 6.100 / 56. 6.100
[AVHWDeviceContext @ 0x55e5dc4e7f80] Cannot load libcuda.so.1
[AVHWDeviceContext @ 0x55e5dc4e7f80] Could not dynamically load CUDA
Device creation failed: -1.
Failed to set value 'cuda=cu:0' for option 'init_hw_device': Operation not permitted
Error parsing global options: Operation not permitted

[tmsrxzar]

the decision to direct play is a client side setting not a server side one, when disabling it on the server all it does it break things as you found out

the client still reports it is capable of playing certain video and certain audio types to the server, the server then decides what it needs to do. if the client supports both the video and audio of the original format then the server will send the streams as is and the client will direct play the content

most clients have this hardcoded in based on the platform, some auto-detect capabilities but all report to the server

[DestinyGrey]

Thanks, I managed to restore functionality. I realized I had forgotten to save the changes of disabling hardware acceleration, so I saved them (pekbac moment). So now I just gotta figure out how to fix the issues of hardware acceleration not happening/working, and then re-enable it.

[DestinyGrey]

I wanted to just provide a brief update to this. I'm afraid I've solved in a rather unhelpful way- I deleted everything about how I configured Jellyfin originally, purged every docker image I had of it, and then re-pulled it, starting from fresh. With the current variables set up in the docker-compose and hardware acceleration re-enabled using Nvidia, I can confirm it is now working, and can verify hardware acceleration is happening via nvidia-smi in the terminal.

I know this won't be helpful to people looking back for ideas on what went wrong, and I do apologize, but it is now working correctly. Thank you to the user who helped me.

[Karmalakas]

when switching quality to 720p, Jellyfin could generally render the video. But switching to 480p would not load at all, and in fact made the Jellyfin player client crash. Only changing the quality back to a higher resolution, or just streaming direct would fix it

Hi, I have probably same issue... How did you manage to change back to higher quality? On Chrome player controls never appear - it just closes and I'm left back on the movie page. I can't find how to set plyback quality before starting to play. If I open the movie on Edge, it plays fine, but it's on Auto. Back on Chrome player crashes.

When I selected 480p, I got:

Code:

[av1_nvenc @ 0x563bc5cb97c0] Codec not supported
[av1_nvenc @ 0x563bc5cb97c0] Provided device doesn't support required NVENC features
[vost#0:0/av1_nvenc @ 0x563bc5d2a940] Error initializing output stream: Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
[libfdk_aac @ 0x563bc5c8bc80] 2 frames left in the queue on closing
Conversion failed!

When I switch quality on Edge or mobile app to force HW encoding, I get what I would expect:

Code:

[hls @ 0x564fb9c4a100] Opening '/cache/transcodes/e11bb24474296c34ccd0e9d8339365a1-1.mp4' for writing
Output #0, hls, to '/cache/transcodes/e11bb24474296c34ccd0e9d8339365a1.m3u8':
  Metadata:
    encoder        : Lavf60.3.100
  Stream #0:0: Video: h264 (Main), cuda(tv, bt709, progressive), 3840x1608 [SAR 1:1 DAR 160:67], q=2-31, 25018 kb/s, 23.98 fps, 24k tbn (default)
    Metadata:
      encoder        : Lavc60.3.100 h264_nvenc
    Side data:
      cpb: bitrate max/min/avg: 25018950/0/25018950 buffer size: 50037900 vbv_delay: N/A
  Stream #0:1: Audio: aac, 48000 Hz, stereo, s16, 256 kb/s
    Metadata:
      encoder        : Lavc60.3.100 libfdk_aac
frame=    0 fps=0.0 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A speed=  0x   
[hls @ 0x564fb9c4a100] Opening '/cache/transcodes/e11bb24474296c34ccd0e9d8339365a10.mp4' for writing
frame=  76 fps=0.0 q=14.0 size=N/A time=00:00:03.20 bitrate=N/A speed=6.12x   
[hls @ 0x564fb9c4a100] Opening '/cache/transcodes/e11bb24474296c34ccd0e9d8339365a11.mp4' for writing
frame=  187 fps=183 q=17.0 size=N/A time=00:00:07.76 bitrate=N/A speed=7.58x   
[hls @ 0x564fb9c4a100] Opening '/cache/transcodes/e11bb24474296c34ccd0e9d8339365a12.mp4' for writing
[hls @ 0x564fb9c4a100] Opening '/cache/transcodes/e11bb24474296c34ccd0e9d8339365a13.mp4' for writing
frame=  294 fps=193 q=17.0 size=N/A time=00:00:12.35 bitrate=N/A speed= 8.1x   
...
[hls @ 0x564fb9c4a100] Opening '/cache/transcodes/e11bb24474296c34ccd0e9d8339365a134.mp4' for writing
frame= 2568 fps=222 q=15.0 size=N/A time=00:01:47.20 bitrate=N/A speed=9.27x   
[hls @ 0x564fb9c4a100] Opening '/cache/transcodes/e11bb24474296c34ccd0e9d8339365a135.mp4' for writing
[hls @ 0x564fb9c4a100] Opening '/cache/transcodes/e11bb24474296c34ccd0e9d8339365a136.mp4' for writing
frame= 2680 fps=222 q=14.0 size=N/A time=00:01:51.87 bitrate=N/A speed=9.28x   

[q] command received. Exiting.

[hls @ 0x564fb9c4a100] Opening '/cache/transcodes/e11bb24474296c34ccd0e9d8339365a137.mp4' for writing
frame= 2705 fps=222 q=14.0 Lsize=N/A time=00:01:52.78 bitrate=N/A speed=9.27x   
video:222422kB audio:3531kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

[gnattu]

Your GPU does not support AV1. Please disable that in transcoding settings

[Karmalakas]

Ah, OK.. Found this matrix and disabled both unsupported encoding and decoding codecs. Now it plays again on Chrome.
But still I don't really understand - why would it fail only on lowest qualities? Video is 4k 10bit HDR and if I choose 1080p or 720p it works fine. But lower - fails. Also now with disabled HW codecs when lowest quality selected,  colors become washed out. But they are fine on 720p or 1080p

[TheDreadPirate]

The quality selector needs to be re-worked. The only thing that triggers a transcode is the bit rate value. If you have a 10Mbps video and you select "1080P - 15Mbps", nothing happens because the bit rate in that quality setting is higher than the video's native bit rate. If you select "720P - 8Mbps" it will trigger a transcode. But the resolution in that setting is not set in stone.

So what you were probably seeing was the former situation where the quality you selected was higher than the video's native bit rate, thus nothing happened.

As for the washed out colors, you must not have enabled tone mapping. What GPU do you have? Tone mapping is only supported on GTX 1000 series and newer.