ffmpeg issue with output from video stream
<p>I have two video streams from which I'd like to take one frame of each, both of them are RTSP. I'm using the same FFMPEG instruction for both of them but changing the URL of the stream, the first one works but the second one throws the error:</p>

<blockquote>
  <p>method SETUP failed: 455 Method Not Valid In This State</p>
</blockquote>

<p>Can anyone tell me what could be the reason for this error and how to solve it?</p>

<p><strong>WORKING</strong></p>

<pre><code>ffmpeg -ss 1 -i rtsp://streamreader:trudat55@69.84.126.216:88/videoMain -an -vcodec mjpeg -vframes 1 -aspect 16:9 -q:v 2 -y test.jpg

ffmpeg version 2.8.2 Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 4.9.2 (Debian 4.9.2-10)
  configuration: --enable-gpl --enable-avresample --enable-libopencore-amrnb --enable-libx264 --enable-libxvid --enable-postproc --enable-version3 --enable-shared --enable-pic --extra-ldexeflags=-pie
  libavutil      54. 31.100 / 54. 31.100
  libavcodec     56. 60.100 / 56. 60.100
  libavformat    56. 40.101 / 56. 40.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 40.101 /  5. 40.101
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc    53.  3.100 / 53.  3.100
[rtsp @ 0x55a60a0a7420] UDP timeout, retrying with TCP
Guessed Channel Layout for  Input Stream #0.1 : mono
Input #0, rtsp, from 'rtsp://streamreader:password@69.84.126.216:88/videoMain':
  Metadata:
    title           : IP Camera Video
    comment         : videoMain
  Duration: N/A, start: 0.200044, bitrate: N/A
    Stream #0:0: Video: h264 (Baseline), yuv420p, 640x480, 50 tbr, 90k tbn, 180k tbc
    Stream #0:1: Audio: pcm_mulaw, 8000 Hz, 1 channels, s16, 64 kb/s
[swscaler @ 0x55a60a102460] deprecated pixel format used, make sure you did set range correctly
Output #0, image2, to 'test.jpg':
  Metadata:
    title           : IP Camera Video
    comment         : videoMain
    encoder         : Lavf56.40.101
    Stream #0:0: Video: mjpeg, yuvj420p(pc), 640x480 [SAR 4:3 DAR 16:9], q=2-31, 200 kb/s, 50 fps, 50 tbn, 50 tbc
    Metadata:
      encoder         : Lavc56.60.100 mjpeg
Stream mapping:
  Stream #0:0 -&gt; #0:0 (h264 (native) -&gt; mjpeg (native))
Press [q] to stop, [?] for help
frame=    1 fps=0.5 q=2.0 Lsize=N/A time=00:00:00.02 bitrate=N/A dup=1 drop=1    
video:66kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
</code></pre>

<p><strong>NOT WORKING</strong></p>

<pre><code>ffmpeg -ss 1 -i rtsp://camaras.corredorautomotriz.cl:554/live.sdp -an -vcodec mjpeg -vframes 1 -aspect 16:9 -q:v 2 -y test.jpg

ffmpeg version 2.8.2 Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 4.9.2 (Debian 4.9.2-10)
  configuration: --enable-gpl --enable-avresample --enable-libopencore-amrnb --enable-libx264 --enable-libxvid --enable-postproc --enable-version3 --enable-shared --enable-pic --extra-ldexeflags=-pie
  libavutil      54. 31.100 / 54. 31.100
  libavcodec     56. 60.100 / 56. 60.100
  libavformat    56. 40.101 / 56. 40.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 40.101 /  5. 40.101
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc    53.  3.100 / 53.  3.100
[rtsp @ 0x55b98f2de420] UDP timeout, retrying with TCP
[rtsp @ 0x55b98f2de420] method SETUP failed: 455 Method Not Valid In This State
[rtsp @ 0x55b98f2de420] Could not find codec parameters for stream 0 (Video: mjpeg, none(bt470bg/unknown/unknown)): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, rtsp, from 'rtsp://camaras.corredorautomotriz.cl:554/live.sdp':
  Metadata:
    title           : RTSP server
  Duration: N/A, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: mjpeg, none(bt470bg/unknown/unknown), 90k tbr, 90k tbn, 90k tbc
    Stream #0:1: Data: none
Output #0, image2, to 'test.jpg':
Output file #0 does not contain any stream
</code></pre>