Stuttering when remuxing

[bobnahara]

Jellyfin 10.10.1
Ubuntu install
Running into video stuttering only when remuxing. Transcoding is fine, direct play is fine. Just remuxing. Super odd. 
Seeing this on web player on both chrome and firefox. 
Have attached a log of the remuxing where I have seen the issue. 

Thanks for help on this. I'm sure I'm just being dumb but it has me stumped

[bobnahara]

Oh just to add specs of the box (its super overkill but I use it for other things but none of those were running when I have had the issues.)
AMD Ryzen™ Threadripper™ 7970X
Intel Arc A770
128 gig of ram

[TheDreadPirate]

Does this happen with EVERY video? Or just a some?

[bobnahara]

So happening on every video that I have seen it remux on.
That is only some videos.

The thing is on the same videos that I see the issues on if I use jellyfin media player it direct plays and has no issues + if I turn down the quality to force transcoding no stuttering.

[TheDreadPirate]

Humor me and manually remux the video, swap out an original (don't delete) for the remux. Then play the video and let it remux the remux. I swear I'm not crazy.

Code:

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

[bobnahara]

Ran the remux command it still stutters remuxing the remux.
Maybe web doesnt like the codec or something.
Trying to avoid having to find all the files and converting them in something like mkvtoolnix
Just to avoid the issue and be lazy I also tried also turn off under user "Allow video playback that requires conversion without re-encoding" but it still is doing the remuxing.

[TheDreadPirate]

What are the specs of the client PC? Or is it the same PC with Jellyfin?

[bobnahara]

Happening on multiple PCs. Doing my testing on my primary pc.
Win10, I9-10900k, 128gb ram, RTX 3090

[TheDreadPirate]

Is the transcode directory a locally attached storage device? /mediapool/jellyfin/transcoding-temp

[bobnahara]

It is. Thats a zfs pool. But I did try and swap it to the primary SSD same issue.