Flip video stream from webcam

[SunThunderR]

Hello!
I need to flip the video stream from the webcam before broadcasting/transmitting it to the website. Is it possible to do this using your UnityWebBrowser or WebBrowser engine? Or maybe you will have the opportunity to add this function?

So that you understand why this is necessary: ​​
My camera must be used in a vertical position (that is, rotated 90 degrees), since the design of the stand where it will be used allows it to be placed only in this position. And I use a snapchat mask that uses this camera.
It would be possible to flip RawImage in Unity, but for some reason, the snapchat mask does not work correctly if the camera is flipped. Therefore, this option with RawImage is not suitable ((
But if you flip it in advance, before transmitting the video to snapchat, then snapchat will work correctly.