Video & Audio: The terms audio and video commonly refers to the time-based media storage format for music/sound and moving pictures information. Audio and video digital recording, also referred as audio and video codecs, can be uncompressed, lossless compressed depending on the desired quality and use cases.
Media storage formats will contain audio codec streams, video codec streams, captions, and Meta information. It combines them to provide the audio or the video, with alternative or enhanced materials.
Video codecs will contain a sequence of frames, i.e still pictures and, for compressed formats, movements between those pictures. Quality will vary depending on the number of frames per second, color space, resolution, etc.
Audio codecs can usually contain one audio channel (mono), two audio channels (stereo), or more channels (e.g. “5.1” surround). For example, human voice is recorded using one channel while music uses in general two or more channels.
Audio and video are used for enhancing the experience with Web pages (e.g. audio background) to serving music, family videos, presentations, etc.
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