H.264 used macroblocks sized at 16x16 pixels to process video frames. HEVC uses Coding Tree Units (CTUs) that can scale up to .
To give you a practical idea of the kind of compression ratios involved, here are some examples from a preset created with HandBrake, an open-source video transcoder. Note that these examples target a "small HD" file, not an extreme 100MB target: 100mb movies hevc full
At a fundamental level, video compression is governed by a simple equation: 100mb movies hevc full
Even if you find a real file, the experience is often broken: 100mb movies hevc full
: To save space, the audio is often crushed down to mono or low-bitrate stereo. Say goodbye to surround sound. CPU Intensity