OBS 0.8.3 DX8 capture is slow

MashedPaturtles

New Member
Specs:
  • i5 3750k
  • 670 GTX
  • OBS 0.8.3 x64
  • Windows 8.1 x64

Stream:
  • x264 (Game Capture)
  • High Profile
  • 3300 kbps CBR
  • veryfast
  • 1080p -> 720p 60 FPS,bicubic

I can stream TF2 perfectly, a DX9 game, maxed out in-game settings with 0 dropped frames and in-game FPS around 120-144.

However, the same settings in UT2004, a DX8 game, crushes my FPS to 60. Lowering the stream frame rate to 45-30 improved performance, but not enough to be played normally (as if OBS wasn't running at all, like TF2).

Is this a problem with the way DX8 games are streamed? Does it use some other slower method that DX9 games like TF2 are taking advantage of? Are there any plans to improve this since DX8 is so old?
 
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