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• Open ffplay & execute command with ProcessBuilder not working

  27 juillet 2015, par Dennis QT

  I was tried to use ProcessBuilder for open ffplay.exe and execute command into ffplay. However it is unsuccessful. How could I do that ?

  Code :

  ProcessBuilder pb = new ProcessBuilder();
  
  
  
  pb.command("C:\\Windows\\System32\\cmd.exe", "/c",
  
  "C:\\ffmpeg\\bin\\ffplay.exe", "tcp://192.168.1.1:5555"); 
  
  
  
  pb.start();

• cannot open http://[wowza-ip-address]:8086/streammanager

  26 août 2017, par mahdi gh

  I’m following this guide for publishing mpegts to wowza server. but when I try to navigate to http://[wowza-ip-address]:8086/streammanager it redirects to http://[wowza-ip-address]:8086/enginemanager

  What should I do ?
  here is the link for guide page : How to publish and play a live stream (MPEG-TS based encoder)

• VideoWriter OpenCV - cannot put pipeline to play in function CvVideoWriter_GStreamer::open

  24 octobre 2019, par 021

  Almost exactly the same question : OpenCV error - cannot put pipeline to play in function CvVideoWriter_GStreamer::open

  Context : I’m trying to create a video and save it in a .avi file with OpenCV 3.3.0 and Python 2.7.

  Problem : This code :

  fourcc = cv2.VideoWriter_fourcc(*'XVID')
  
  out = cv2.VideoWriter('data/out/output.avi', fourcc, 30, (800, 600))

  Raises :

  (python2.7:12345): GStreamer-CRITICAL **: gst_element_make_from_uri: assertion 'gst_uri_is_valid (uri)' failed
  
  
  
  ** (python2.7:12345): CRITICAL **: gst_ffmpeg_cfg_set_property: assertion 'qdata->size == sizeof (gint64)' failed 
  
  OpenCV Error: Unspecified error (GStreamer: cannot put pipeline to play ) in CvVideoWriter_GStreamer::open, file /soft/OpenCV3.3/opencv-3.3.0/modules/videoio/src/cap_gstreamer.cpp, line 1690
  
  VIDEOIO(cvCreateVideoWriter_GStreamer (filename, fourcc, fps, frameSize, is_color)): raised OpenCV exception:
  
  
  
  cap_gstreamer.cpp:1690: error: (-2) GStreamer: cannot put pipeline to play
  
   in function CvVideoWriter_GStreamer::open

  Question : How do I solve this problem so I can write video files with OpenCV ?