Why is there no sound when beauty camera takes video?

There is no sound when the beauty camera takes a video because the mobile phone has no permission to turn on the microphone of the beauty camera.

Beauty camera is an APP that turns a mobile phone into a selfie artifact. Created by Meitu Xiu Xiu team, it is specially designed for girls who love taking selfies. Automatic beauty and intelligent beauty, subvert the traditional photo effect, instantly automatically beautify, perfectly preserve facial details, and let photos bid farewell to blur.

Digital camera is a product integrating optics, machinery and electronics. It integrates the conversion, storage and transmission of image information, and has the characteristics of digital access, interactive processing with computer and real-time shooting. Light enters the camera through a lens or lens group, and is converted into a digital signal through an imaging element of a digital camera, and the digital signal is stored in a storage device through an image operation chip. The imaging element of digital camera is CCD or CMOS, which is characterized in that when light passes through it, it can be converted into electrical signals according to different light. Digital cameras first appeared in America. More than 20 years ago, the United States used it to transmit photos to the ground via satellite. Later, digital photography was converted to civilian use, and its application scope continued to expand.

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