AVCONV to transcode MJPEG to RTSP
The 'copy' codec tells avconv to skip decoding and encoding. It is useful if you are trying to change the container format but in your case, you are changing the format of the stream from MJPEG to H264.

Just leave '-vcodec copy' out and let avconv figure out that it must transcode from mjpeg to H264:

avconv -i rtsp://admin:admin@192.168.11.11/streaming/Channels/2 -map 0  -f H264 udp://192.168.10.11:5014

[mjpeg @ 0x113f1d0] Changeing bps to 8
Input #0, rtsp, from 'rtsp://admin:admin@192.168.11.11/streaming/Channels/2':
  Metadata:
    title           : Media Presentation
  Duration: N/A, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 320x240 [SAR 1:1 DAR 4:3], 50 tbr, 90k tbn, 90k tb
No pixel format specified, yuvj420p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.
[libx264 @ 0x116a980] using SAR=1/1
[libx264 @ 0x116a980] using cpu capabilities: ARMv6 NEON
[libx264 @ 0x116a980] profile High, level 2.1
Output #0, h264, to 'udp://192.168.10.11:5014':
  Metadata:
    title           : Media Presentation
    encoder         : Lavf56.40.101
    Stream #0:0: Video: h264 (libx264), yuvj420p(pc), 320x240 [SAR 1:1 DAR 4:3], q=-1--1, 50 fps, 50 tbn, 50 tbc
    Metadata:
      encoder         : Lavc56.60.100 libx264
Stream mapping:
  Stream #0:0 -&gt; #0:0 (mjpeg (native) -&gt; h264 (libx264))

Press [q] to stop, [?] for help
frame=   51 fps= 34 q=31.0 Lsize=       9kB time=00:00:00.98 bitrate=  71.7kbits/s dup=40 drop=0    
video:9kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB  muxing overhead: 0.000000%