Please describe the problem:
The udpsrc component (used by the rtsp source componet) fails with the following error on Mac OS X (10.5)

udpsrc gstudpsrc.c:763:gst_udpsrc_start:<udpsrc0> allocating socket for 0.0.0.0:0
udpsrc gstudpsrc.c:780:gst_udpsrc_start:<udpsrc0> binding on port 0
udpsrc gstudpsrc.c:887:gst_udpsrc_start:<udpsrc0> error: bind failed -1: Invalid argument (22)

The error is due to the address_len being the wrong size: sizeof(src->myaddr) instead of sizeof(struct sockaddr_in), I'd guess this is due to differences between IPv4 and IPv6.

I'm pretty sure this is related to what's described in #534243

Steps to reproduce:
1. Use the rtspsrc filter to access a UDP rtsp url on Mac OS X 10.5


Actual results:
The pipeline fails to start

Expected results:
The pipeline would start

Does this happen every time?
Yes

Other information: