[LukeLambert]

I want to maintain the aspect ratio of my crop, not that of the source image. Perhaps `fit=cover-scale-down` would be a more appropriate name. In other words, I always want a square image <= 512px wide. I think this is a very common use case.

[rhizome]

If there's no way to specify where the center (or w/e) of your crop is on the source image, it's not going to happen.

[Aeolun]

Even I can do ‘most interesting part’ detection. CF certainly can.