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• How to equalise heights of two videos to be used in hstack ffmpeg

  7 novembre 2018, par Abhilash

  I want to combine two videos using hstack in ffmpeg. The problem is that the two videos have different heights. And the heights can vary as the sources are dynamic. So how can I equalise the video heights to the maximum height of them and hstack them.

• IP Webcam on OpenCV for Java

  14 novembre 2015, par Vinicius Nogueira

  I am using IP Webcam APP for android and it is streaming MJPEG video through the local url :

  http://192.168.0.2:8080/video

  I was able to show the video using VLC player and this piece of code in C++.
  On the OpenCV 2.2 I opened the url using :

  VideoCapture cap;
  
  
  
  cap.open("http://192.168.0.2:8080/video?dummy=param.mjpg");

  It worked in C++, but I want it to work in Java. I was able to run OpenCV2.4.9 using Java when taking pictures from my built in webcam. This is my code for taking the images from a url in Java.

  System.loadLibrary("opencv_java249");
  
  
  
  VideoCapture capture = new VideoCapture();
  
  
  
  capture.open("http://192.168.0.2:8080/video?dummy=param.mjpg");

  But the capture.open does not open the streaming and I could not debug it properly. I know that it might be a issue with the ffmpeg, since it works on OpenCV2.2. I also know that my OpenCV2.2 is specific for MS 2010 and might be more complete.

  Would it help if I compile the OpenCV2.4.9 from sources ? Is there a file that I could add to solve that problem ? Is there another way of receiving the video from the IP camera and using on OpenCV ?

• Microsoft SmoothStreaming video on Apache ?

  2 juin 2014, par earizon

  I created what I consider to be a valid smooth streaming output using ffmpeg with the smooth streaming muxer and also alternatively through the ismindex utility (included in ffmpeg sources).

  I’m trying to use an standard web server like Apache instead of IIS and its S.S. extensions. The output is segmented content (each fragment is split to is own file) so theoretically this is possible. Now comes my first problem where I’m stuck.

  How can I test the result using for example a Window Phone 8 ?. I tried to open the index.ism url from I.Explorer, but the extension ism and the mime-type (application/vnd.ms-sstr+xml) is not recognized and I.Explorer just dump the xml instead of opening the media player.
  I was waiting for a similar behaviour to that of Android/iOS when the (HLS) index.m3u8 URL is clicked. In this case the browser/OS detects the extension and open the player.

  Thanks in advance for any help, hint or link !