How to turn the video in the camera into a photo

Well, as a matter of fact, you have come up with an idea. The rest is just another software, the essence is the same.

One of the "crooked ways" is that there are some video conversion software (used on mobile phones), right? First, the video is converted into frames of pictures, and then the pictures are connected to other formats. You can try to choose some useful pictures from these pictures, but don't expect to be clearer.