How to take a screenshot/video of a specific area of ​​Android?

Question

Java

Good afternoon, there is an application, it implements video display through the VLC library (Media Player), the video is played via an RTSP stream. It is required by pressing a button (conditionally "Take screenshot") to take a screenshot from the video player in real quality and not a screenshot of the entire Layout. It is also required to take a video from the same player using a similar method, for example, when you click on the button (conditionally "Take video"), the recording of the object starts and when you click it again, the recording ends and is placed in the user's phone gallery.

If you have any thoughts and solutions where to dig, tell me please