jan@robotmrm-test:~$ avconv -i /dev/video4 -codec copy -b 64k -r 25 -f h264 rtp://192.168.0.116:5004
avconv version 0.8.3-4:0.8.3-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers
  built on Jun 12 2012 16:37:58 with gcc 4.6.3
[h264 @ 0x9561a80] max_analyze_duration reached
[h264 @ 0x9561a80] Estimating duration from bitrate, this may be inaccurate
Input #0, h264, from '/dev/video4':
  Duration: N/A, bitrate: N/A
    Stream #0.0: Video: h264 (Baseline), yuv420p, 352x240, 25 fps, 25 tbr, 1200k tbn, 2400k tbc
Output #0, h264, to 'rtp://192.168.0.116:5004':
  Metadata:
    encoder         : Lavf53.21.0
    Stream #0.0: Video: [0][0][0][0] / 0x0000, yuv420p, 352x240, q=2-31, 90k tbn, 1200k tbc
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
Press ctrl-c to stop encoding
frame=  419 fps= 41 q=-1.0 size=     834kB time=10000000000.00 bitrate=   0.0kbits/s