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I want to record videos of blood play. Not that kind of blood play. However, this seems impossible to do without affecting game performance too much.
If I try in-game recording through DOSBox, the game slows to 3-4 FPS crawl. Completely unplayable.
Then, I tried FRAPS. With FRAPS it is necessary to put the rendering mode to OpenGL, which seems to be a higher toll on the system than the default Overlay. Recording in-game with FRAPS I still get only ~15 FPS when playing, and frequent sub 10 slowdowns. It cripples the gameplay in a fast shooter like Blood, and doesn't look good "on film".
I tried specifying which cores FRAPS could use, and letting DOSBox use another, but no amount of tweaking has had any impact on performance.
The processor is a Core i7-720QM (laptop). It has a low base core speed of 1.7 GHz however, and I'm uncertain whether DOSBox can take any advantage of multithreading or turboboost concepts. The processor can run as a 2.0 GHz dual or a 2.4 GHz single core, and should dynamically adjust itself according to usage.
Anybody get video recording to work satisfactorily in-game, please tell me how.
This question / problem has been solved by Portendimage
I have a similar setup as you on my second laptop that I couldn't see to get DOSbox video recording to work with anything else except 320x200 normal resolution and tweaking the dosbox.conf file by changing the "machine=" line to "machine=vesa_nolfb"
Since then I was able to record with minimal slow down.
for example: http://www.youtube.com/watch?v=WQzqYkmy8zc and http://www.youtube.com/watch?v=aqhbiWYvdys ( apologies about the quality )
Use OBS studio. I've used it with Blood and had no issues.