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• Why is it still TCP when I using python opencv rtsp capture option "udp" ?

  9 août 2024, par nojob

  I've written a code which plays a IP Camera RTSP Video using pythong and opencv.
Like this :

  


  import cv2
cap = cv2.VideoCapture("rtsp://videoIP")


  


  And I added a line for using UDP packets. (I want to connect with camera with rtsp using UDP. And it really supports it.)

  


  os.environ["OPENCV_FFMPEG_CAPTURE_OPTIONS"] = "rtsp_transport;udp"


  


  After wrote this, wireshark says it is still TCP packet from camera IP.


  


  I've erased my IPs, just camera source and my PC.
Why is it happend ?
I've already found some docs for opencv, ffmpeg but still I have no idea.

  


• Use FFmpeg for continuous streaming from other source

  28 septembre 2017, par widgg

  We have an app that pipes its output, and its output is compress H264 data. The source of the data is from a 3d engine running in same app.

  We can easily pipe the output in FFmpeg to save as mp4 or even m3u8.

  It’s also possible to turn FFmpeg as a server to feed video files.

  So our objective is to have FFmpeg read that data, convert into into mp4 or m3u8 internally and then stream so that it can be read in the web browser.

  We don’t care about be able to replay some file, go back in time or whatever, we just care about the current value.

  Is there a way to do that ? Or a similar solution that would allow some close to that.

  Thanks

  I guess, if it’s possible, it’s like wanting to stream your personal webcam into the web browser. Then you could connect to that and see what is happening at home or wherever your webcam is.

• Processing jpgs stream from the standard output

  31 juillet 2012, par D.Rosado

  Using FFmpeg I converted a video (mpeg2) into jpgs, redirecting the output into the standard output.

  StringBuilder str = new StringBuilder();
  
  
  
      //Input file path
  
      str.Append(string.Format(" -i {0}", myinputFile));
  
  
  
      //Set the frame rate
  
      str.Append(string.Format(" -r {0}", myframeRate);
  
  
  
      //Indicate the output format
  
      str.Append(" -f image2pipe");
  
  
  
      //Connect the output to the standard output
  
      str.Append(" pipe:1");
  
      return str.ToString();

  I'm able to receive the callback from the process with the data :

  _ffmpegProc.OutputDataReceived += new DataReceivedEventHandler(_ffmpegProc_OutputDataReceived);

  But how can I save that back into jpg files ?, I'd need to know the size of each jpg, but I cant figure out how.

  Thanks.