The thing that is amazing about imagemagick/graphicsmagick is the fact that they can open 100+ formats. That is not something to be taken for granted.<p>Other than that... they feel kind of old. Video++ feels really new, I'm excited to try it out, but I will miss support for all those weird formats I love so much.<p>I don't see any video examples though - or is that all handled using opencv?<p>I've found opencv's png/video decoders to be extremely picky. Opencv doesn't open some files that other libraries will and because of that I've been extremely hesitant about using it as my main image IO.