The Zencoder PHP Library by Zencoder is a PHP library that assists developers with using and integrating the Zencoder API. The Zencoder API provides web-based encoding software-as-a-service, designed to quickly convert any video into web and mobile compatible formats, with various languages available.
The Rekognition API differentiates its feature set by processing images to recognize more than just the location of faces. Rekognition's technology will analyze a given photo and present a list of scenes, each with a probability rating. Faces are not simply identified, but are also classified for age and emotion.
If you wonder which of the 267 APIs on this site people view most often you might be surprised. It's not Google Maps, it's YouTube. Which has been true for quite some time. But the number of mashups using YouTube has been small, until recently when they've started to pick-up.