Question / Help OBS recording and CPU

T

tactikill

New Member
Hello,
I have been looking for a new cpu, and I do enjoy recording/streaming with OBS so I am taking that into consideration. I also work a lot with media such as video and picture.
Recently I have been looking at x264 benchmarks and have been curious as to how they relate to obs. http://forums.techarp.com/reviews-articles/26957-x264-hd-benchmark-5-0-a.html here is one example. Most have a 2 pass encoding, so I am wondering, with regards to obs, should I consider the 1st pass data or 2nd pass data more? When recording obs only does 1 pass correct?
 
Jack0r

Jack0r

The Helping Squad
Live encoding is 1pass yes, a 2nd pass needs a finished video if I am informed correctly.
The benchmark itself will only tell you that CPU X can encode settings Y at speed Z.
That will tell you if you use settings Y in OBS with an FPS of W instead of Z (Z being the maximum fps you can encode with CPU X) you will have free CPU room. I cannot say exactly if you could calculate how much free CPU would be left as this depends on too many factors.

This is also the reason why you can only give rough estimates of what is needed for stream X or Y. In general with a passmark value (this includes an x264 benchmark) of around 4000 points you can mostly stream at around 720p and play a game on the same machine. (Depending on the game you might have to lower settings). For 1080p you would want 6000 points or more to be barely able to do a fluid stream.
 
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