Using with VMware Horizon

[TwoDogs2]

I encountered some issues during the installation process, and the patch did not echo and stuck in this interface Is there any good solution? thanks

[umlaeute]

i have no idea what you are trying to do.
what i gather is, that you want to apply some random patch following some unknown tutorial to get an outdated version of v4l2loopback running with some commercial software.

since v4l2loopback is run by unpaid volunteers, i would kindly ask you to to follow these general rules:

• please do not post screenshots of your console. instead post the actual text!
• use the latest and greatest v4l2loopback unless you have reasons to do otherwise. if you have such reasons, tell us!
• provide information about what you actually trying to do. if you are following a tutorial or some 3rd party instructions, tell us where these instructions can be found!
• you probably should first ask the person who wrote these instructions
• if this doesn't help and your problem is with a commercial product, try contacting them (they sell things, they earn money, they are supposed to provide support)

in your specific case this boils down to:

• please post text.
• v4l2loopback-0.12.5 is not the latest and greatest (though this is actually unrelated to your problem)
• it is quite obvious that you are following some instructions. i don't think that these instructions are somewhere here; so we do not know what you are doing. ask whoever wrote these instructions.
• VMWare Horizon is a commercial product. contact their support

your specific problem is how you invoke patch.
you probably should read the documentation:

man 1 patch

(I'm sorry I do not really feel like expanding on this)