Video Codecs – Half 2

When planning a video mission, the specified finish end result should take into accounts the video codecs out there right now. Right here is Half 2 of video codecs.


The QuickTime (.mov) video format is a multimedia container file. The .mov can include a number of tracks, with every observe storing a unique kind of knowledge: audio, video, results, or textual content (eg for subtitles).

A digitally-encoded media stream (utilizing a particular codec) is a part of the contents of the file, and an information reference to the media stream situated in one other file could also be included as properly.

QuickTime is nice for video enhancing for the next causes: it will probably include summary information references for the media information; it separates the media information from the media offsets; and the observe edit lists; and the aptitude to import and edit in place with out information copying.


The MPEG video format wants an encoder that’s extra difficult then the decoder. The decoder solely carries out mounted actions whereas the encoder must be algorithmic or adaptive. MPEG took a novel strategy to standardization, making the decoder customary as an alternative of the encoder. If the decoder can efficiently interpret the bit stream, it’s thought of compliant.

Standardizing the decoder has the benefit, since, over time, the algorithms could enhance for the encoder, however the decoder will nonetheless have the ability to operate. There’s little or no info relating to construction and operation offered by the MPEG requirements for encoders.

Implementers can use proprietary algorithms to develop an encoder. This offers alternative for various encoder designs; this additionally means there will be all the advantages of a aggressive market. Higher designs can evolve, giving customers extra decisions. Completely different ranges of value and complexity to be present in encoders won’t have an effect on the flexibility of the decoder to interpret the bit stream.

I hope that these newest posts helped with some understanding of the assorted video codecs out there.

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