HTTP implementation is supported across all platforms. Apple do not support RTSP/RDP, although it is supported in Android. The limitations are based on the OS, rather than TPControl. We have implemented support using AMX's API implementation and will post examples when we formally release support.

More details available here:
Apple: http://developer.apple.com/library/ios/documentation/Miscellaneous/Conceptual/iPhoneOSTechOverview/MediaLayer/MediaLayer.html#//apple_ref/doc/uid/TP40007898-CH9-SW6
Android: http://developer.android.com/guide/appendix/media-formats.html
Windows: http://msdn.microsoft.com/en-us/library/windows/desktop/dd757927(v=vs.85).aspx