I'm convinced that the h264 codec really is actually chaotic black magic.

I make a 25 minute generative video with a bunch of circles expanding in a rippling effect? FFMPEG crunches it into 133mb. Take those same circles and make them fall downwards in the screen? 58mb.


Experientially, I've figured that the h264 goddesses are pleased when video input is:

limited in color (using 2 colors, plus anti-aliasing)

limited in detail (vector graphics, simple primitives)

straight lines over curves (triangles and rectangles compress better than circles on average)

linear movement (falling downwards shapes is better than growing shapes)

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@paul well I have a 20 yo mjpeg low-res video playing with the video cam noise and exagerated motion vector movements, and ... it's a hell to translate correctly in h264... I'll fiddle again next days with it but it's indeed really difficult to encode without loosing the point ...
it's really a codec tested against "some" sort of imagery ...

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