How to do the video background?

Tik Tok needs to buy a black light-absorbing cloth, a shelf and an LED lamp to record videos on a black background. Then he propped up the shelf, put the black cloth on it and clamped it. Then he prepared an LED lamp, installed it on the top of the shelf, and it fell all the way. Finally, he hit the lamp on the back of the character to separate the person from the cloth, so that he could record the black background.

Technical introduction:

Video usually refers to the storage formats of various dynamic images, such as: digital video formats, including DVD, QuickTime and MPEG-4; And analog video, including VHS? Use Betamax. Video can be recorded and transmitted through different physical media: when the video is shot or transmitted by radio, it is an electrical signal, while when it is recorded on a magnetic tape, it is a magnetic signal.

1, pay attention to the original material coding, resolution, and the format and code rate of the final video. During editing, we should pay attention to the sense of rhythm (not only the music rhythm, but also the visual rhythm of the whole film), whether the transition mode is appropriate, whether the color brightness is uniform or achieves the expected effect, and the coding mode, code rate and sound used when outputting the film.

2. When editing the video, the material taken in the early stage is very important. Without good original material, you can't edit an excellent film. The more environmental sound, music material, video and film material, the better. Generally, the ratio of membrane material to membrane is about 1: 3-5. Excellent documentary company 1: 20-30. That is, choose one shot from 20 to 30 shots.