What is the shutter speed of shooting video with SLR to ensure each frame of the later screenshot?

It depends on how many pieces are cut. There are two known factors, one is the video frame rate and the other is the shutter speed. It is impossible to change the shutter speed without changing the frame rate. For example, the shutter speed is 60, the video format is 24fps, and the maximum number of screenshots per second is 24. In the video settings, the video format should be set to 24fps, 50fps and 60fps.

In other words, there are as many pictures as there are frames per second. If the video frame rate is set to 24, the minimum shutter speed is 24. By analogy, if the video frame rate is changed to 60, then the lowest shutter speed is 60.

Frame rate is the number of frames that the picture is refreshed every second, which can also be understood as how many times the graphics processor can refresh every second. For movie content, the frame rate refers to the number of still frames displayed per second. To generate a smooth and coherent animation effect, the frame rate is generally not less than 8; The frame rate of the movie is 24fps. When capturing dynamic video content, the higher the number, the better.

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Matters needing attention in shooting video with SLR camera

1, exposure: the difference between instantaneous and permanent.

It is called still photography. The exposure is determined at the moment when the shutter is released. Even if you need to fill the light, you can also use the flash to assist. But dynamic video generally emphasizes continuous exposure. Unless special effects are created, there will be no obvious exposure change in the film scene, otherwise the flickering visual effect of the film is not ideal.

2. Choose the correct shooting mode

In order to control the settings in the camera and achieve a stable exposure effect, it is recommended to use manual mode when choosing the shooting mode, because there are uncontrollable factors in automatic, aperture priority and shutter priority modes, and only in manual mode can the parameter settings be fully mastered, which is less affected by environmental changes.

3. Calculation method and selection of shutter number

Shutter speed is one of the parameters to control exposure, and it can also determine the fluency and effect of the film you shot during video recording. For example, 24p is commonly used when shooting movies, and the following shutter values should be set before shooting.

If you want to clearly shoot every action and behavior of the subject, you can set the shutter number to twice the number of frames, that is, the number of frames is 1 second, and the shutter speed can be increased to? 1/50s is relatively safe. If you are pursuing the afterimage effect when the object is moving, you can lower the shutter speed again. After setting the shutter number, try not to change it at will during shooting.

4. Aperture determines depth of field

In photography, the aperture size can not only control the light entering the camera, but also use the large aperture to create a beautiful shallow depth of field to highlight the theme. Whether you choose a large aperture or a small aperture, it is not recommended to change the light when shooting. It is safer to pause and adjust the circle size. This lens is suitable for filming, and it is easier to shoot the sense of focal shift that is common in movies when zooming manually.