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+--- Thread: SOLVED: Jitter/stuttering with Direct Play on some videos (/t-solved-jitter-stuttering-with-direct-play-on-some-videos)
Jitter/stuttering with Direct Play on some videos - Tom Haddon - 2025-11-02
Hi,
I've recently downloaded some videos with yt-dlp from https://www.arte.tv/ and they're displaying some jitter/stuttering even though there's no transcoding happening.
The jellyfin server is running on Ubuntu 24.04. I've installed via the jellyfin repos:
Code:
$ dpkg -l | grep jellyfin
ii jellyfin 10.11.1+ubu2404 all Jellyfin is the Free Software Media System.
rc jellyfin-ffmpeg5 5.1.3-1-jammy amd64 Tools for transcoding, streaming and playing of multimedia files
ii jellyfin-ffmpeg7 7.1.2-3-noble amd64 Tools for transcoding, streaming and playing of multimedia files
ii jellyfin-server 10.11.1+ubu2404 amd64 Jellyfin is the Free Software Media System.
ii jellyfin-web 10.11.1+ubu2404 all Jellyfin is the Free Software Media System.
$ cat /etc/apt/sources.list.d/jellyfin.sources
Types: deb
URIs: https://repo.jellyfin.org/ubuntu
Suites: noble
Components: main
Architectures: amd64
Signed-By: /etc/apt/keyrings/jellyfin.gpgHere's the media info for one of the videos that's stuttering:
Code:
S01E01
Container: mp4
Path: /srv/jellyfin/..../Season 1/S01E01.mp4
Size: 1.6 GiB
Video
Title: 1080p H264 SDR
Codec: H264
Codec tag: avc1
AVC: Yes
Profile: High
Level: 41
Resolution: 1920x1080
Aspect ratio: 16:9
Anamorphic: No
Interlaced: No
Framerate: 25.000387
Bitrate: 4968 kbps
Bit depth: 8 bit
Video range: SDR
Video range type: SDR
Pixel format: yuv420p
Ref frames: 1
NAL: 4
Audio
Title: AAC - Stereo - Default
Language: und
Codec: AAC
Codec tag: mp4a
AVC: No
Profile: LC
Layout: stereo
Channels: 2 ch
Bitrate: 189 kbps
Sample rate: 48000 Hz
Default: Yes
Forced: No
External: NoI can't see any substantial difference between this and another video that I've downloaded from a partner organisation but isn't displaying any jitter/stuttering. However, it seems this jitter/stuttering happens with any videos I download from Arte. If I play the video on the same machine that jellyfin is running but using VLC (i.e. not using jellyfin) it plays fine. The two clients that I've used that are displaying these symptoms are the web client (running on the same machine as jellyfin) and an Android TV on my local network.
As I say, I've checked the logs and there's no transcoding happening.
Any help appreciated. Thanks.
RE: Jitter/stuttering with Direct Play on some videos - alucardnos13 - 2025-11-03
try to use handbrake to re-encode the downloaded file to one of the 1080p profiles which is using "profile:Normal"
then delete the old file, replace it with the new and scan library again.
i suppose you run everything in your local netowork
RE: Jitter/stuttering with Direct Play on some videos - Tom Haddon - 2025-11-03
Thanks, that does seem to have fixed it. I used the "Official > General > Fast 1080p30" preset (Handbrake version 1.7.2+ds1-1build2 from the Ubuntu repos).
This seems to be the difference in ffprobe output:
New file:
Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 4209 kb/s, 25 fps, 25 tbr, 90k tbn (default)
Old file:
Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 4968 kb/s, 25 fps, 25 tbr, 90k tbn (default)