It took 4 days of painful work, but i finally got there. I consider this the base for my UAV experience. The transmission is incredibly stable, the video is really smooth. Here is what i used:
-Logitech C920, a good quality camera.
-Pandaboard: has an embedded video encoder that can take the raw YUYV video from the camera and encode it in h264. You can set the encoding quality/bitrate and other parameters.
-HSDPA usb dongle; 60 hours of high speed connection for 10€/month, i have a 2Mbps upload speed with this little beast. Ping increases during workload and reaches 250ms, when unused, it's as low as 50ms.
-The traffic is sent from the pandaboard to a VPN i connect with my client. This is only a way to bypass firewalls.
864x480 works but it's not as smooth as 360p, and i consider the 360p streaming to be more than enough for this. 1280x720 lags considerably.
If there is interest maybe i can publish my code and a video of how it works. Anyway, i'm a happy guy and i wanted to share it. I've never tried radiofrequency video transmission, but was worried about the range.
Now, i don't have to worry about it anymore ;)