Your cpu is not powerful enough to handle burning in the subtitles for these high bitrate files. When you don’t use subtitles, the transcoding is done through your graphics card so it’s nice and quick. To burn the subtitles, it hands that information back to your cpu to handle. Your cpu can’t handle it.
I don’t know hoe Jellyfin works so I can’t answer that question.
therefore,I think the reason why plex transcoder can not do the transcoding is because of some kind of software issue which your engineers should dig in,not just reply every one here “your hardware is not powerful enough”.
and when plex transcoding the film,the cpu usage never gets over 50%,is that “not powerful enough”?
more like not optimized enough to me.
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I believe Plex does single-CPU core software subtitle burn-in. If your jellyfin build manages to do it in “not above 50%”, how many cores do you have? Maybe they can utilize multi-cores, while Plex uses one?
4 core 8 threads,but I think it is an I/O issue,when plex is transcoding files with subtitles,I/O speed is too low,it may has some kind of throttling mechanic to limit transcoding I/O speed to match the stream bitrate,which cause the continuous buffering.
This thread seems very similar to one I opened.
PMS 1.28.1 has a problem.
That problem has been well documented for some time now.
Reverting to PMS 1.28.0 restores normal operation – as temporary workaround.
Please be advised, The transcoder has been fixed as is in final testing now.
There will also be a really nice improvement you’ll appreciate.
Not sharing any more details but in the testing I’ve done so far, it has pleased me every time.
Regarding burning of subtitles,
- There are many NAS platforms which don’t have enough CPU power
- There are several players which don’t support PGS subtitle overlays.
- As more players start to support PGS subtitle overlay, the teams are adding support for them.
If anyone needs 1.28.0, I will attempt to get it for them.
I will need specifics about what to get. I will not repost all of 1.28.0’s binaries.
Some devices (specifically Android based one) will require you to have the Android Developer Bridge (ADB) to install the package (side load)
I’m using 1.28.2 ,same result.
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