How to get pixel data for encoding video

I want encode my 3d sence for rtmp live and record to mp4 file.How can i do this?

Hi,

Video capture has been covered in a number of topics; perhaps that can help? Community has suggested a few internal and external methods.
https://discourse.urho3d.io/search?q=video

thank you.I find a solution in Graphics::TakeScreenShot