Live video keystoning

[Nate-lee]

Hi everyone,

I need some help in finding software you can keystone live desktop capture image? Thanks in advance.

Nathan CAples

 

[Dave m]

I admit that I haven't a clue what you mean?

How are you acquiring the distorted image in the first place?

or do you wish to keystone an image already in the machine?

[sunray]

I guess you have a poor camera angle, realistically it will be better if you can resolve it in hardware, ideally by improving the camera position.

I used some software many years ago (supplied to us by Barco) which worked well for stills but but it seemed to make parts of the moving image wander around. I'd describe it by saying something moving across the screen didn't all move at the same time.

I'm sure something better exists now though.

[dosxuk]

OBS (with a plugin) and Caspar CG (natively) can both be used to keystone a captured video feed in real time (although both have a few frames of delay).

[timsabre]

I assume he wants to keystone a capture of his computer screen. OBS is a good suggestion. But would need a second screen to run obs while the other screen is being captured. 

[Nate-lee]

So, I'm wanting to keystone a 4k IP camera picture. I want to use a static camera at a high angle over a large blackboard. A bit like what Kaptivo does but live video. To be able to capture the writing on the blackboard, with out the person who's writing in the way. I need software to keystone the picture. I hope that helps. I have looked into the above, unfortunately no joy. Thanks

[timsabre]

OBS could do this using a plugin - see https://obsproject.com/forum/resources/corner-pin.1474/

[Nate-lee]

I'm using V-Mix. 

[timsabre]

Um... is there anything else you'd like to tell us about your setup which would help our answers? OBS can pretty much do everything V-Mix can, but it depends what else you are doing with V-Mix.

 

Searching the vmix forum it looks like you can do this within V-mix with a bit of messing about, using the source rotation function (click settings cog for the input)
https://forums.vmix.com/default.aspx?g=posts&t=2280

Edited January 16, 2023 by timsabre

[James]

Are you able to supply a still showing what you are getting from the existing camera to indicate how much keystoning you are looking for? 

James.