Subtitles cause consistent pauses during playback

[NetZero 0]

I'm pretty new to emby and have been a long time plex user but I was pulled in with the BDMV support anyways I apologize If I am asking a question that already has a solution

I could not find but here it goes.

 

If I enable subtitles during playback or if subtitles were enabled by default (either way subtitles in general) cause my playback to freeze for 1-5 second intervals every 5-20 seconds

during playback.  This issue happens across Firefox, IE, Edge, and Android (I have not tested further).  I've tested this with 3 different movies (transcode logs will be attached with 60

seconds of playtime each).  I've enabled and disabled "Allow subtitle extraction on the fly" and is currently disabled.  I've enabled and disabled "Hardware Acceleration" and is currently

enabled (though I can't really tell if it's doing anything, It would be cool to get some feedback for that on stats ).  When subtitles are disabled playback is flawless.

 

Any suggestions would be appreciated!

ServerLog.txt

TranscodeLog_1.txt

TranscodeLog_2.txt

TranscodeLog_3.txt

Edited May 30, 2018 by NetZero

[Luke 42083]

Hi, this is happening because bluray subtitles are not supported by the browser and can only be playable by burning them in with server transcoding. That's why the extraction setting makes no difference with these kinds of subtitles because they've never going to be extracted at all.

 

Unfortunately the process of burning in subtitles can be painful for your server cpu, and based on your logs it appears your system just can't do it fast enough.

 

For best results, here are my suggestions, although I realize you may not like them:

• Consider acquiring external text-based subtitles, which our subtitle downloading features can help with. External text subtitles are always the most efficent
• Or, consider converting to mkv. This won't help the browser because it will still need to burn in the subtitles, but the android app will be able to direct play the mkv without any transcoding.

Please let us know if this helps. Thanks.

[NetZero 0]

Hey Luke,

 

Thanks for the quick response.  I will look into the external text-based subtitles route that seems like the best option for me.

One thing I am not to clear on is what sort of CPU power would I need to keep up with that process?  Is it a concurrent thread

limitation? I'm running 2x E5-2690 v2's on a dedicated box just for emby and it seems odd that it's too slow for the burn-in.

 

Thanks again for the solution!

[Luke 42083]

I think because it is hevc 4k input that is part of the reason for the high cost here. I think your cpu would be fine if it were 1080p input.