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The encoding scheme is very basic and therefore allows for fast encoding and fast playback.Īt some point though, its quality is not good enough for low bitrates.
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Encoders are often found embedded into hardware. It’s been the main choice for video compression for many many years now. It offers high quality at the expense of high file sizes.
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This is mostly used on DVDs and TV broadcasting. Also see this answer for an explanation of current containers. DivX?), and how does it differ from a File Format (e.g. The following is partly taken from my answer to the question What is a Codec (e.g. We will take a look at the best and most widely used ones. These days, there are a lot of codecs around. There is always one specification, but there can be an arbitrary number of codecs for this specification. This is why most video formats are known under a MPEG acronym. Almost every specification for video has been written by the Motion Picture Experts Group. Video codecs don’t know anything about audio encoding, so this is why there is a need to synchronize them for playback.Ĭodecs mostly encode video with regard to a specification. Containers on the other hand are file formats that are supposed to wrap video and audio into a single file.Codecs take a video and convert it into a bitstream, mostly with the goal to minimize its size.Codecs, when used to compress videos, try to reduce this data using some visual tricks. But why is there even a need for codecs? Every video is a sequence of frames, mostly more than 25 frames per second.
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A video codec specifies the software (or the algorithm) to convert video files into a bitstream and then decode that bitstream into a video again. In this post, we will go through the most popular video codecs and the software you need to get the best results.īefore we begin to encode, we have to ask: What is a video codec? “Codec” stands for encoder/decoder. Converting videos from one format to another is a very simple task, given the right tools. They come in quite a few different formats – all with their own advantages and disadvantages.
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