Question / Help Where to set rescaling options?

[Light And Magic]

If I stream my games, I use Game Capture on the syphon injected games and crop their output to 1920 x 1080 in the Game Capture properties in the OBS scene. 16:9 is what Twitch wants, and so I give it to them.

But I do not want to have my viewers need a massive download speed, so I never actually stream in 1080p (1920 x 1080), instead I rescale to 720p (1280 x 720).

In the Video settings of OBS I set my Base Resolution to 1920 x 1080 and the Scaled Resolution to 1280 x 720 with a Downscale Filter set to Lanczos.

In the Output settings you find another Rescale Output settings which I currently set to 1280 x 720 too, but what does this actually do if I already scale my resolution down to 720p in the Video Settings?

 

[dodgepong]

Setting your resolution to 1080p vs. 720p doesn't really affect how much download speed your viewers need to watch your stream -- that is controlled by bit rate.

You don't need to rescale in your output settings. That is mainly in case you want to recording and stream at different resolutions.

 

[Light And Magic]

Bitrate calculators tell me I would need a bitrate of over 6000 Kbps if I was to stream in 1080p whereas using 720p I can get away with less than 3000 Kbps. My viewers complain about chunky video when I set my bitrate anything over 2000 Kbps so I figured that 720p in 30 FPS would be the best I can do when no one seems to be able to watch my stream otherwise. Where am I wrong, please teach me, as I would love to offer the best stream possible without lots of viewers having lag issues.

 

[dodgepong]

You can set your resolution to anything you want, and your bit rate to anything you want, and it will work. You don't need a particular bit rate for a particular resolution for it to be able to stream. Whether it looks good or not is a different question, but you are "allowed" to stream 1080p at a lower bit rate than that.

 

[Light And Magic]

I see, well I will still opt for using 720p in a decent bitrate so the quality is good enough for my needs ;-)