Support for opening network streams

[addisonj]

I am curious about support for opening up a multicast and/or unicast stream for video.

Ffmpeg and others support an input of the form: udp://@239.10.0.1:4000 (multicast) or udp://@:4000 (unicast) for retrieving a stream.

Support for something like that would be awesome.

Another option would be a streaming interface, so the networking could be handled by an outside the scope of this module and also allow for other interfaces (reading from a fifo pipe or file descriptor for example)

Any thoughts?