Why is anime special?

[dstarfire]

This is one of those just-cause-I'm-curious type questions.

Anyways, what is it about anime that causes encoders to have to treat it differently than other video sources?

As a specific example in megui the avsynth script creator can't seem to analyze an anime unless you specify that the content is anime.

Also, I've noticed at least one ripping program seemingly optimized solely for anime.

[Dark Shikari]

A number of reasons:

1. Encoding-wise, anime benefits from more reference frames far more than live-action sources do.

2. Filtering-wise, anime has tons of flat areas, which means a totally different approach is justified in filtering the video.

3. Ripping-wise, anime is often much more difficult to IVTC than ordinary video, and also sometimes suffers the dreadful hand of the frame blender, which is also hard to reverse.

4. Muxing-wise, anime often has sections at different framerates (OP/ending, for example), requiring variable framerate.

[dstarfire]

Thanks for the info. I had no idea the internal structure was such a mess. The only thing I could figure that was different is that anime often has large (relatively) expanses of single colors, which allows some compression techniques to be far more effective, and others not so much so.