![]() ![]() If a shot doesn’t change much from one frame to the next, modern compression can tell a video player to only update the pixels that do change, rather than redrawing everything.Ĭompression also reduces file sizes by reducing the quality of a picture, usually imperceptibly. To dramatically oversimplify a complex topic, compression lowers the file size of a video by tossing out redundant or unnecessary information. While both videos will technically have a resolution of 3,840 pixels by 2,160 pixels, what’s in those pixels is determined by something called compression. Playing a 4K video from Netflix’s servers should be the same as playing it from a Blu-ray, right? Not exactly. Streaming Compression Ruins Beautiful 4K Movies Streaming will almost always look worse, but for some things it might not matter. Netflix offers 4K movies, but are they good enough to compete with the UHD Blu-ray you can find in a store? Well, no.
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