Throttling Not Happening

[Neminem 1630]

Tdarr can monitor libraries and automate it

[specy 0]

Any update? Can we have an ETA On the fix please?

[derfy79 3]

@Luke@sa2000

 

Hello, as I would really appreciate it if you could fix this bug, I've set up a test environment to properly diagnose the problem.

Unraid server 7.2.3 with official 4.9.3 Emby Docker with hardware transcoding enabled.

What happens when I have a problematic file is that after a few minutes of playback (2 or 3), the video pauses for 1 second and then resumes... this happens repeatedly.

I have a file with 3 different subtitles (SUBRIP).

I've noticed that only one of the subtitle files is problematic. The one called "forced." If I extract it from the MKV file, I no longer have the problem; if I don't select it when playing the video, I don't have the problem. But I'm still seeing some strange things in the logs.

Another observation: if I use Emby Web with Chrome or Edge, it doesn't seem to have any problems either. Even though I'm still seeing some strange things in the logs.

If I install Diagnostic Option Plugins and enable "Disable HLS subtitles," I don't have any problems.

If you'd like me to provide you with logs and/or run some tests, I can do that for you. Thank you.

[visproduction 338]

Here is a guess.

Subrip is graphic based subtitles and if there no subtitles in the first few minutes, perhaps estimating the transcoding seems fine and begins, but when the graphic subtitles hit, the hardware cannot handle the transcoding in real time at the current transcoding settings.  There is no way for Emby to predict that several minutes into the media, the transcoding settings will take longer than in real time and so the transcoding will buffer and stall.

This would fit all the symptoms, I read.  Maybe I missed something.

Can anyone else recreated the problem? 

I made a case in an earlier post, that this is a file mangement issue.  If an admin wants to transcode, easily without any stuttering, then add hardware or support encoders cards to handle the resolution, even when a subrip graphic subititle starts 3 minutes into a media, or, lower the resolution transcoding settings.  Trying to get Emby to analyze an entire media length, prior to transcoding, is not a good solution.  If this was setup, it would probably fail to work well, cause delays for any user who leaves it switched on and make people think that Emby is broken.   WIth better hardware or transcoding settings, even the tough subrip might work fine.  At most, I would suggest just to have an analzye test that goes further into the media and helps a user find the best transcoding settings and not make this feature into anythng automatic.

If several people can see this issue then maybe adjust Emby to look a little further into the media to test for transcoding. I don't think there is anything to fix, if it only happens to one setup.

 

Edited 5 minutes ago by visproduction