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• Image Overlay on video using JavaCV for Android

  1er juin 2015, par Hermine Sanasaryan

  I’m trying to add image with transparent background on the video, using JavaCV.

  I’m using FFmpegFrameGrapper, for grapping frames and I’m trying to set my image on every frame of the video, and record it again using FFmpeg Recorder, but no result.

  I’m doing something like this

  // img is the IplImage of a frame

  private IplImage setOverlay(IplImage img){
  
      cvCopy(overlayImage, img); //overlayImage I'm getting from 
  
                                 //internal storage
  
      cvResetImageROI(img);
  
  
  
      return img;
  
  }

• Streaming full HD using lighttpd streaming

  2 juin 2015, par HD Quality

  We have 1000 of HD full length movies and streaming using lighttpd all the files are converted using FFMPEG .FLV format, and we got VPS(Cent OS) 2TB storage & CPU : 6 cores & 30 GB RAM & 1 Gbit/s port.

  when we get traffic player buffering very long time means 10min to start play,i spend searching google and tried all the possible way to improve but no luck.

  can any one suggest how other sites are running without buffer issue,

  1.http://cloudy.ec

  3.http://putloader.com

• Seam carving

  13 février 2008, par Mikko Koppanen — Imagick, PHP stuff

  Today I was reading trough the ImageMagick ChangeLog and noticed an interesting entry. “Add support for liquid rescaling”. I rushed to check the MagickWand API docs and there it was : MagickLiquidRescaleImage ! After about ten minutes of hacking the Imagick support was done. Needless to say ; I was excited

  For those who don’t know what seam carving is check the demo here. More detailed information about the algorithm can be found here : “Seam Carving for Content-Aware Image Resizing” by Shai Avidan and Ariel Shamir

  To use this functionality you need to install at least ImageMagick 6.3.8-2 and liblqr. Remember to pass –with-lqr to ImageMagick configuration line. You can get liblqr here : http://liblqr.wikidot.com/. The Imagick side of the functionality should appear in the CVS today if everything goes as planned.

  Here is a really simple example just to illustrate the results of the operation. The parameters might be far from optimal (didn’t do much testing yet). The original dimensions of image are 500×375 and the resulting size is 500×200.

  Update : the functionality is pending until license issues are solved.

  php

  < view plain text >

  1. < ?php
  2.  
  3. /* Create new object */
  4. $im = new Imagick( ’test.jpg’ ) ;
  5.  
  6. /* Scale down */
  7. $im->liquidRescaleImage( 500, 200, 3, 25 ) ;
  8.  
  9. /* Display */
  10. header( ’Content-Type : image/jpg’ ) ;
  11. echo $im ;
  12.  
  13.  ?>

  The original image by flickr/jennconspiracy

  

  And the result :

  

  Update. On kenrick’s request here is an image which is scaled down to 300×300