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A comment on H.264 is magic (2016). Parent comment

Re:H.264 is magic (2016) by ComodoHacker on Friday May 24, 2019 @03:24AM (#19999238)
Subsampling actually is a form of quantization, which in turn is a form of lossy compression.
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Re:H.264 is magic (2016) by ttoinou on Friday May 24, 2019 @03:27AM (#19999259)
A bad form of it given that you already have the ability to reduce bitrate per channel on the encoder side. It leads to a lot of issues like pixel format conversion and decoders incompatibilities for example
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