Besides using FFmpeg, are any novel optimizations/compression being offered?
It's also bandwidth adaptive streaming, backed by a global CDN, and generates both Live and VOD HLS streams.
But, more importantly, we've designed it in such a way that as a developer, you don't even have to worry about that! The library just exposes a really simple API that does all of the video magic for you.
Kickflip currently requires iOS 7 and works on any iOS device which supports iOS 7.
The Android requirements are a bit steeper, unfortunately: Android needs at least 4.3, as that's when the hardware encoder access API which we use was introduced.