Question / Help OBS Classic works perfectly but OBS Studio can barely run

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daigo1

New Member
I guess this feedback is more of a complaint than anything, because my OBS Classic runs very smoothly, but when I put the same settings into OBS Studio, my entire laptop just starts lagging and OBS Studio only runs at like 5 fps, dropping thousands of frames per minute, and spits out high-encoding warnings and can't run at all. I even tried lowering the bitrate to about 500 (on OBS Classic I can run it on 1,500 no problem), fps to 30 (Classic can do 60 no problem), lowered the output resolution to all of the possible ones, played around with all the downscale filters, as well as the CPU usage preset speeds, and all of the possible combinations thereof. Studio just will not run properly. But with Classic, everything on the highest settings I can run them at streams pretty much perfectly.

I can't read code so I can't comment on the development of OBS, but my best guess is that the newer OBS Studio is designed to be more functional with newer, higher end machines built for streaming, whereas the older OBS Classic may not be as powerful in terms of features and higher quality, but it allows to be run on older, less powerful machines smoothly. (Since my laptop does not have a graphics card and only has onboard graphics, which may not be ideal for streaming, but nonetheless it works nearly perfectly on OBS Classic.)
 
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Dilaz

Member
Both of them use the same encoder and same scene rendering method so the issue is probably somewhere else. Post a log with the issue to support-section.
 
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daigo1

New Member
I didn't know how to get the sources to be a certain opacity (in OBS Classic the Opacity setting is in the source setting itself) so I had to find a way to make them transparent somehow so I just put Chroma filters as a substitute. Should I try removing them all?
 
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Greendweller

Member
OBS Classic runs very smoothly, but when I put the same settings into OBS Studio, my entire laptop just starts lagging
Click to expand...

This is not true; a quick count shows that you use about 10 sources in classic and 13 in Studio so thats already a difference.
And you use and excessive amount of chroma key filters, even on your game capture...
That will be hard on your 2 core processor.

And the classic obs log shows that you also had problems with the setup on that:
13:09:49: Total frames encoded: 706, total frames duplicated: 86 (12.18%)
13:09:49: Total frames rendered: 724, number of late frames: 5 (0.69%) (it's okay for some frames to be late)

Mayby you didn't noticed it because heartstone is a verry static game but the lag is still there.

Anyways try to cut back on the amount of sources and run reveral tests to test what will work for your system.
(likely not very much as it is only a 2 core cpu)
 
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daigo1

New Member
I don't know what the logs are saying, but if you actually view my streams you can see a very big difference. There's no stutter or lag with Classic, but with Studio it looks like a slideshow. I have 12 Scenes in Classic (the log for Classic doesn't show the Browser sources I am using, so that's why you counted only 10), and 13 in Studio, but one Scene in Studio was disabled during the test anyway (and the source wasn't even running in the background). The lag might still be there, but as long as it's not noticeable I think it's fine. But it's noticeable in Studio. If I have to cut back on Sources with Studio, then I would rather use Classic with all the Sources I want since it just works.

I just tried deleting all the Chroma filters and the 1 additional Scene and tested again, but it's the same results as before
 
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