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Real World Video Compression by Andy Beach

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Chapter Four. Preprocessing

You have your video shot, captured, and edited, and it’s ready to compress, encode, and deliver. But one more step is left before 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 include deinterlacing, inverse telecining, cropping, scaling, aspect ratio adjustments, noise reduction, brightness and color corrections, and corrections to audio.

Preprocessing is almost always necessary to getting your video to look its best. The goal of preprocessing is to both clean up any noise in the video and optimize its basic elements for playback on the devices you are targeting ...

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