Some videos are stuttering on Intel N150 CPU

[Antero]

Hi,
I am Plex user trying to migrate to Jellyfin, and although I am used to use Linux, mostly Ubuntu, I decided to install Jellyfin on Windows for two reasons, I am much proficient in Windows and my Plex server was installed on Windows, so it's easier to migrate using the same platform.

I am facing the following odd issue:

Jellyfin version: 10.10.3
Platform: Windows 11
HW: Intel N150 CPU (Beelink Mini S-13)
Issue: Some videos are stuttering, other with similar specs (1080p HEVC SDR) play smoothly, with no apparent reason.
This happens either playing via Chrome browser or Android TV (Chromecast with Google TV)
I am using hardware acceleration Intel QuickSync (QSV)

Can someone help me?
Thanks

[TheDreadPirate]

Is the video direct playing on both clients?

[Antero]

Yes, direct playing, locally.

[Antero]

This Video is playing well:

Title1080p HEVC SDR
CodecHEVC
Codec taghev1
AVCNo
ProfileMain 10
Level120
Resolution1920x800
Aspect ratio2.40:1
AnamorphicNo
InterlacedNo
Framerate23.976025
Bitrate2001 kbps
Bit depth10 bit
Video rangeSDR
Video range typeSDR
Color spacebt709
Color transferbt709
Color primariesbt709
Pixel formatyuv420p10le
Ref frames1

But this other, is stuttering:

Title1080p HEVC SDR
CodecHEVC
Codec taghev1
AVCNo
ProfileMain 10
Level120
Resolution1920x800
Aspect ratio2.40:1
AnamorphicNo
InterlacedNo
Framerate23.976215
Bitrate1999 kbps
Bit depth10 bit
Video rangeSDR
Video range typeSDR
Pixel formatyuv420p10le
Ref frames1

If I compare the video settings looks the only diference is the colorspace, is there a setting in Jellyfin to solve this issue?
Do I need to recode the video, if so, what program should I use to "correct" it?

[Antero]

I just did an experience, I moved my Plex installation to this Intel N150, and tried to play the same movie.
Result: plays smoothly, so the issue must be Jellyfin related, because with the same movie and same PC, I get diferent results between Plex and Jellyfin.

[TheDreadPirate]

Is it transcoding on Plex? The color space on the second file isn't listed, but since it is still "SDR" I am assuming the color space is also BT709. If Plex is transcoding or remuxing, but Jellyfin is direct playing, that would point to a problem with the video. Which can often be fixed by manually remuxing.

Can you share your jellyfin logs via pastebin?

[Antero]

Plex is doing direct play, same as jellyfin, in Jellyfin video play is terrible, trembling a lot, in Plex, no issues, not completely smooth, but OK, very low CPU usage.
I am testing several environments, so I have more than one disk images, I bought a second M.2 SSD, so I can easily reboot between operating systems, these days one 512 GB is not very expensive and I can use it later for other purposes.
I believe the best way is to make comparations using the same operating system, my old plex was in windows but I created an environment in Ubuntu and the tests will be on this operating system.
Can you help me? where are the jellyfin logs stored in Ubuntu?
If needed, how can I manually remux? And if doing so, wouldn’t I lose video quality?
Regards

[TheDreadPirate]

Remuxing does not involve encoding. Just copying the video and audio into a new container.

/var/log/jellyfin is where the logs are located

Code:

/usr/lib/jellyfin-ffmpeg/ffmpeg -fflags +genpts+igndts -i "/path/to/problem/video.mkv" -map 0 -codec copy -max_muxing_queue_size 2048 -max_interleave_delta 0 -avoid_negative_ts disabled newFile.mkv

[Antero]

Thanks!
I will try that and let you know, probably after I get the second M.2 SSD, next weekend or so.