Is there any plan to address high CPU usage when transcoding subtitles? It seems a bit ridiculous that I hit 100% CPU usage on an i7-4790k. This only occurs when using subtitles.
That’ll depend on what kind of video you’re playing. Your CPU is certainly powerful enough for some 1080p transcodes.
Also… depending on your OS, 100% could refer to 1 of 4 CPU cores being fully utilized (Windows tends to show multi-core CPUs as multiples of 100%).
I apologize. I probably should have provided some specs.
I run Windows 10 Home
I have an i7-4790k
16gb RAM
What seems to occur is when watching a movie that requires subtitles (EX: Nausicaa of the Valley of the Wind) the CPU usage will spike from about 7-8% to over 100%. It will stay like that for 20-30 seconds (even though I set my buffer throttle to 1, changed the quality to faster encoding and chose very slow transcoding, as well as changing the maximum number of simultaneous transcodes to 1) then it will idle around 50% and spike again to 100% randomly for seconds at a time, even though I’m not trying to skip forward or backwards. I’ve seen other threads from one to two years ago complaining of the same thing.
Not sure I see the issue about that. When you stream a video file, there’s no linear load on your system. There’ll be variable bitrates or ups/downs w/ regards to the buffer.
Let’s say I’m not totally shocked.
That only affects transcode for other things not streaming so this has no affect. Plex Web does not support subtitles so PMS has to add them to the video. This is quite cpu intensive. You didn’t say what type of video this was. Your cpu can handle about (4) 10 Mbps 1080p videos or (1) 40 Mbps video or (1) 10 Mbps hevc video.
It also depends on the type of subtitles. PGS or VOBSUB (as found on Bluray and DVD) are impossible for the web app to display.
SRT on the other hand can be rendered by the web app and therefore doesn’t require transcoding during playback.
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