Problems with FFMPEG

Hi all!

I'm trying to use FFMPEG to get a snapshot of an rtsp video, and I'm getting the next error:

[rtsp @ 00000000028ce540] UDP timeout, retrying with TCP
[rtsp @ 00000000028ce540] method SETUP failed: 461 Unsupported Transport
[rtsp @ 00000000028ce540] Could not find codec parameters for stream 0 (Video: h263, yuv420p): u
Consider increasing the value for the 'analyzeduration' and 'probesize' options

Of course, when I test it in my computer the script works.