How quick are the special effects to a local monitor?

[tripletopper]

Has anyone measured how long it takes to input to HDMI signals apply special effects to them and output the result to an HDMI monitor?

I have a one millisecond HDMI monitor. I understand it's not quick enough to do like gun games, but then again neither are most of the modern technologies able to work with the old school lightning games.

But I have tested it what millisecond ping in game mode is quick enough for a fighting game. I assume it would be quick enough for a pinball game?

The reason why I ask is because when I convert VGA to composite and then use a composite video editor to merge those two the two different eyes of a virtual tap Virtual Boy into one image where the left image is red and the Right image is cyan to make a 3D image.

I noticed when I play Galactic pinball I'm always leading the ball I'm not reacting instantly.

I know this when I play a single VGA input it works perfectly fine.

Is it the special effects that slow it down to the point of it not working live?

All I need is some sort of circuit that could merge two HDMI to USB capture cards images into an RGB additive mix.

Is OBS fast enough where you can play 3D Galactic pinball on the Virtual Boy in stereoscopy?

I would send the output to a second monitor and hook it up directly to the second monitor if OBS is fast enough to play Pinball.

The main question is is OBS processing two USB HDMI sourced videos quicker than a combined VGA to composite conversion and a composite merger of the two videos using a 90s era VHS editing board?

Just wondering how to get a live quick RGB additive mix to VGA and/or HDMI.

 

[AaronD]

There's guaranteed to be at least one frame of latency, as a lot of things depend on having a full frame available. Beyond that, depends on details of your system that might be hard to get, so it's easier to just measure it.

Make a video that has something distinctive on each frame, like maybe a sequential number, and run that through in a way that you can see two copies overlaid on each other: one direct, and one through OBS. Record the result, and see what the difference is.