High Efficiency Video Coding, also known as HEVC or H.265, is the next step in this evolution. (Of course, any video will lose quality if you compress it too much, but the smarter these techniques are, the more you can compress a video before getting to that point.) HEVC/H.265 Compresses Videos More Efficiently, Perfect for 4K Video It’s all about making the video file more efficient without compromising quality. These are just two over-simplified examples of the methods AVC/H.264 uses, but you get the idea. So, the compression algorithm can split the frame up into those same macroblock chunks and say “you know what? These chunks don’t change for 100 frames, so let’s just display them again instead of storing the entire image 100 times.” This can reduce file size dramatically.

The background doesn’t change much-most of the difference between frames is in Iron Man’s face and body. Take this shot from Captain America: Civil War. In video, this is called intra-frame compression-compressing the data of an individual frame.ĪVC also uses inter-frame compression, which looks at multiple frames and notes which parts of the frame are changing-and which aren’t. Take this still frame of me and my son-much of the sky is the same color blue, so the compression algorithm can split the image up in to chunks-called “macroblocks”-and say “hey, instead of remembering the color of each pixel, we can just say that all of these chunks along the top are the same color blue.” That’s a lot more efficient than storing the color of each individual pixel, which lowers the file size of the final frame. Advanced Video Coding, also known as AVC or H.264, is the best standard for video compression in widespread use, and there are a few different methods it uses to try to reduce the file size of your video.įor example, in any given frame, it can look for areas that are mostly the same color.

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