Traditionally, the general analog display itself has the function of drawing and freezing. However, it is only limited to the manual local operation of the monitor and does not affect video recording and other display equipment.

If it is to be implemented on a video signal source, it is relatively troublesome, but it is not impossible.

First find the transmission coaxial cable of the front camera (taking analog video as an example), and peel off the cable sheath and inner sheath. Be careful not to damage the copper cable inside, and don't short-circuit the shielding layer and copper core of the copper cable. Then use a double-core wire with a small clip to clamp the shielding layer and the copper core respectively, and the other end of the double-core wire is connected to the video capture card (or the AV input port of the TV box). At this time, open the video software of the computer. The next step is to transfer the picture, 1, take a screenshot, open the picture, display the whole screen, press the VGA output switch key on the notebook, FN+F8, and the screen will be output to VGA. The output VGA is connected to the video converter from VGA to AV, and the output port of the video converter is connected to the video line of the camera, core to core, shielding to shielding, and then the video line is cut at the camera end.

Give it to me.