title: ffmpeg input rtsp error
body: <p>I played url <em>rtsp://admin:admin@camera-ip:4455</em> successfully this link from camera.
  but when i get it by ffmpeg.</p>
  
  <pre><code>ffmpeg -i rtsp://admin:admin@camera-ip:4455 -codec copy -f rtmp:/streaming-ip:1935/RTMP/test
  </code></pre>
  
  <p>i got error : </p>
  
  <pre><code>[rtsp @ 0x241f0e0] UDP timeout, retrying with TCP
  [rtsp @ 0x241f0e0] method PAUSE failed: 455 Method Not Valid in This State
  [rtsp @ 0x241f0e0] Could not find codec parameters for stream 0 (Video: h264, none): unspecified size
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  Guessed Channel Layout for  Input Stream #0.1 : mono
  Input #0, rtsp, from 'rtsp://admin:admin@camera-ip:4446':
    Metadata:
      title           : RTSP Session/2.0
    Duration: N/A, bitrate: 64 kb/s
      Stream #0:0: Video: h264, none, 90k tbr, 90k tbn, 180k tbc
      Stream #0:1: Audio: pcm_alaw, 8000 Hz, 1 channels, s16, 64 kb/s
  Output #0, flv, to 'rtmp://streaming-ip:1935/RTMP/test':
    Metadata:
      title           : RTSP Session/2.0
      encoder         : Lavf56.15.102
      Stream #0:0: Audio: pcm_alaw ([7][0][0][0] / 0x0007), 8000 Hz, mono, 64 kb/s
  Stream mapping:
    Stream #0:1 -&gt; #0:0 (copy)
  Press [q] to stop, [?] for help
  [rtsp @ 0x241f0e0] UDP timeout, retrying with TCP
  rtsp://admin:admin@camera-ip:4446: Operation not permitted
  [flv @ 0x250ca00] Failed to update header with correct duration.
  [flv @ 0x250ca00] Failed to update header with correct filesize.
  size=       0kB time=00:00:00.00 bitrate=N/A
  video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)
  </code></pre>
  
  <p>what is the reason? and what can i do to solve this problem.</p>
  
  <p>Thank for help.</p>