4Preprocessing Video and Audio
You have shot and edited your video, and now it’s time to compress, encode, and deliver it. But one more step is left before final encoding can begin. This step is called preprocessing, and it consists of a variety of optimizations you need to perform on the video and audio before you can hand them off to the encoder. These optimizations can include deinterlacing, inverse telecining, cropping, scaling, aspect ratio adjustments, noise reduction, brightness and color corrections, and audio adjustments.
Preprocessing of some sort is almost always necessary to get your video to look its best. The goals of preprocessing are to clean up any noise in the video and to optimize its basic elements for playback on the devices ...
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