![]() Watch this video: How Codecs Work – Tutorial All of it!.More modern workflow guides are found further below. A&E’s guide is dated but very good for theory. This one is close: A&E’s Technical Guides to All Things Audio and Video (v3), PDF. Video Theory (Complete): Following encoding guides without understanding the theory is just asking for trouble, but, with so much background necessary, there is just not a good place to starting learning about video encoding.To display any given frame, every frame before it must be decoded starting from the nearest previous key frame. And then recording the changes between that second frame and the frame after and so forth. Motion Picture Engineering Group (MPEG) video encoding works by compressing one picture (known as a “key frame”) and then recording any changes between that frame and the next frame.The basic idea is to reduce the file size to subjective “acceptable” levels while retaining the highest quality possible. Even a minute of raw uncompressed video is several GigaBytes (GB) in size. The most basic reasons to encode video are to preserve complex changes (such as any filtering) and to make the video stream smaller.Video Theory (Basic): Video can be described as a series of pictures shown quickly in succession. ![]()
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