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zip is based on the lempel-ziv algorithm.
mpeg1 layer3 (mp3) uses huffman encoding (but that's only after doing lossy prcoessing on the track).
jpeg is using a loseless encoding called 'run-length', but that's after quantizing the dct results, which is a LOSSY process.
so, as far as i know, huffyuv is loseless, mjpeg is lossy, mpeg is even more lossy.
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