I tried the methods found on the Internet, which is very convenient:
Many people want to take off the wonderful scenes when watching movies, but the screen capture hotkeys on the keyboard are ineffective when playing movies. This is because Windows does not use static processing for video files, but calls the direc TX function for plotting. Some playback software provides the screenshot capture function, but the size of captured images is usually small and unsatisfactory. In fact, there is a small secret that allows the print screen function key on the keyboard to restore the screen capture function-install two different playback software, use a playback software to play a video at will, pause playing (do not close) and start another playing software. Now you can use the print screen function key! This is because the first playback software has called the DirectX function, and the second playback software can no longer be called, so that we can intercept the screen and paste it into the image processing software.