The fundamental process of video compression, known as block-based hybrid coding, remains the same: frames are divided into blocks, the redundant information is removed, and what's left is compressed. However, H.266 refines almost every part of this process. For instance, the largest block size (the Coding Tree Unit, or CTU) was increased from 64x64 pixels in H.265 to a massive 128x128 pixels in H.266. This means the encoder can more intelligently group similar areas of a frame, resulting in far fewer decisions and a more efficient encode. For a film like Shrek , where there are large areas of flat color (like the sky) and highly detailed regions (like Shrek's face), this flexibility is a huge advantage.
Fast-paced action scenes, like the tournament fight or the escape from the Dragon’s castle, remain smooth without breaking into macroblocks. shrek 2001 720p bluray h266 vvc usac 20 ra