How to solve the ripple in the shot video picture?

In fact, there are two reasons for this fluctuation:

1. First, the screen refresh frequency of camera equipment and computer monitor is out of sync.

2. The second is due to the interference of moire fringes.

Solution:

1, some mobile phones will have the option of "reducing flicker", and you can enter to slow down the refresh frequency;

2. Adjust the angle of the camera or display screen of the mobile phone when shooting, and try to shoot obliquely;

3. Adjust the shooting distance, that is, find the appropriate distance between the camera of the mobile phone and the computer monitor;

4. Try to get photos by screen recording or screen capture, so that the photos will be clearer.

Moire fringes will appear when taking pictures on the screen with a mobile phone or camera, because the spatial frequency of the pixel array of the sensor of the mobile phone or camera is different from that of the vertical and horizontal pixel grid on the computer screen, resulting in spatial aliasing interference.

Simply put, Moire fringe is the result of interference between computer display screen, mobile phone camera and mobile phone display screen.

Simulate the situation when shooting a screen with a camera: the vertical and horizontal pixel grid on the computer screen is equivalent to the first layer of wire mesh, the CMOS or CCD sensor array in the mobile phone camera is equivalent to the second layer of wire mesh, and the mobile phone display screen is equivalent to the third layer of wire mesh, so the pattern shot has moire fringes.

For example, if you look at the scenery outside the window, what you see is a clear picture at a glance. But if you add three layers of window screening, you will see hazy and various stripes. These three layers of window screening overlap together, which is similar to the visual effect caused by the interference of display screen, mobile phone camera and mobile phone display screen.

Extended data:

Three ways to take high-quality photos and videos:

The first point: good lighting and light.

Brightness and light are very important when taking photos or videos with mobile phones. Choosing the right brightness will improve the brightness and clarity of your photography.

The second point: keep the phone stable.

But all the beautiful photos were taken with the photographic equipment fixed. Because of the human nervous system, it is impossible to hold the mobile phone tightly with both hands. So we can do it with a camera tripod.

Third: get close to what you want to shoot.

After all, mobile phones don't have high-powered lenses. In order to make the image clearer, reduce interference or reduce noise when shooting video, we should all be close to things.