Capture of video from a DSLR still camera. Android based device.

Explore and implement; capture of video from a DSLR still camera. Android based device. I can gain shell access. I’m not a coder so I need your input and explanation to me in a simplistic way please. I would ideally like the camera to have a simple menu item toggle that could create a video capture of still images at as many frames per second the camera can take. Also, the ability to capture a live stream of video via computer. But the camera does use non standard file formats due to it capturing images in a different way. So I need to work with you on establishing what is grass bile.