RGB format flip shader

[ahmadreza-hadidi]

@mrayy thank you for this great plugin. It works very good.
I have a problem in video quality by using default I420 converting you provide within plugin.
So i decided to use RGB format, Can you add a shader like I420 that just flip the texture in Y axis.

The problem of using default I420 format is that by the "height/1.5" converting my image quality decreased compared to using "autovideosink" with gst-launch

[mrayy]

Hello @ahmadreza-hadidi
The reason I used I420 instead of RGB is to speed up the upload speed to the GPU. If you want to use RGB instead, then it should be straightforward.