![]() ![]() An example of an uncompressed codec is V210, developed by Apple, back when dinosaurs ruled the earth. Even though storage is cheap, that's still going to pose a problem just playing it back will be taxing. Given that a single frame of 1080p video has around 2.1 million pixels, each frame is going to require a about 7.8mB, and at 24 fps thats ~187mB per second, or 671gB per hour. At say, 10 bits per colour channel, each pixel will take 30 bits. The difference between uncompressed and lossless is that uncompressed just store the colour channels as a stream of bytes, similar to a PCM stream in audio. But there are also uncompressed and lossless codecs that store the raster in a mathematically lossless way, so that each pixel in the decoded video will have the same colour information as the encoded video. Matt provided a good description of RAW codecs, but they are not prevalent in video, other than as camera codecs that get transcoded before use. I'll illustrate by giving an example of the size of an uncompressed stream of video.įirst it might be worth noting the difference between RAW and uncompressed codecs, and uncompressed and losslessly compressed codecs. While a relatively cheap device has been able to deal with a stream of PCM audio since the eighties, even today you need fast storage and a decent system to play a stream of uncompressed video. The reason there is no widely used uncompressed video format, as there is for audio is that the data rate for uncompressed video is so colossal that uncompressed video is kinda useless.
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