1080p often requires much less memory storage than 4K. This allows you to record more clips to your memory card and take up less space on your editing hard drives. 4K cameras often require much faster and more expensive memory cards, as well.
avatar filmed in 1080p or 4k
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When you buy or rent a movie or TV show from the Apple TV app, the device that you're using might warn you that it can't play 1080p (HD) or 4K video content. Instead, your device automatically plays the highest-quality version of that video that it can. Your other Apple devices will play the higher-quality version if they're compatible.
Yes, if you record a video in 4K, then downsize to 1080p, the image will look much clearer than if you shot the video on a 1080p camera. You can also zoom in up to 200% and still retain the quality in a 1080p time line.
Why it may look better is because most sensors these days use chroma subsampling. On most consumer 1080p video camera products, the camera records in 4:2:0. Meaning that each pixel actually shares it's color value with 3 similar surrounding pixels, but every pixel does get its own luminosity value (Y'). This looses 50% of the information captured by 4:4:4, in which each pixel gets its own color value and luminosity value, but the size of the clips produced are 50% more. This is more expensive, and data-hogging.
But now in 4k video, every 1080p pixel now gets 4 individual pixels (it's still being recorded in 4:2:0 though), in which color values are still being shared however, when you downscale to 1080p, every pixel now gets its own individual color and luminosity value! This is called 4:4:4, which not to long ago, costed upwards of $10,000.
The most common argument against shooting 4k videos is that they take up a lot of storage space due to large file sizes. Often, people will cite the fact that you can simply upscale 1080p to 4k and still get great results. However, these arguments are rooted in misconceptions and misunderstandings. 2ff7e9595c
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