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• writeImages and renaming the images using PHP

  3 mai 2015, par Kiran Kumar Dash

  I am working on a multimedia project. So, I am having a case where I am producing a sequence of images from a string input using he code below :

  <?php
  
  
  
      /*** a new Imagick object ***/ 
  
      $aniGif = new Imagick();
  
  
  
      /*** set the image format to gif ***/
  
      $aniGif->setFormat( "gif" );
  
  
  
      /*** a new ImagickPixel object for the colors ***/
  
      $color = new ImagickPixel( "white" );
  
  
  
      /*** set color to white ***/
  
      $color->setColor( "white" );
  
  
  
      $colorarray =array("white", "red", "blue" , "aqua", "fuchsia", "gray", "lime", "maroon", "navy", "orange", "purple", "silver", "teal", "yellow",  "green", "maroon", "green", "olive");
  
  
  
      /*** the text for the image ***/
  
      $string = "Hello Kiran Kumar";
  
  
  
  
  
      /*** a new draw object ***/
  
      $draw = new ImagickDraw();
  
  
  
      /*** set the draw font to helvetica ***/
  
      $draw->setFont( "./SociaLAnimaL.ttf" );
  
  
  
      /*** set the draw font to helvetica ***/
  
      $draw->setFontSize( "100" );
  
  
  
      /*** loop over the text ***/
  
      for ( $i = 0; $i <= strlen( $string ); $i++ )
  
      {
  
          /*** grab a character ***/
  
          $part = substr( $string, 0, $i );
  
  
  
          /*** a new ImagickPixel object for the colors ***/
  
          $color = new ImagickPixel( "white" );
  
  
  
          /*Generate random number for random color*/
  
          $randomNumber = rand(0,16);
  
  
  
          /*** create a new gif frame ***/
  
          $aniGif->newImage( 1920, 1200, $colorarray[$randomNumber] );
  
  
  
          /*** add the character to the image ***/
  
          $aniGif->annotateImage( $draw, 960, 600, 0, $part );
  
  
  
          /*** set the frame delay to 30 ***/
  
          $aniGif->setImageDelay( 30 );
  
  
  
      }
  
       /*** write the file ***/
  
          $aniGif->writeImages($directory.'kiran.jpg', $out);
  
  
  
  
  
  
  
  
  
      echo 'all done';
  
  
  
  ?>

  Now the problem is the writeimages object is generating images as kiran-0.jpg, kiran-1.jpg, kiran-2.jpg and so on. but what I am expecting is kiran001.jpg, kiran002.jpg, kiran003.jpg...and so on so that I can create a video out of it in while maintaining the sequence.Here is the code for video creation :

  <?php
  
  $ffmpeg= "/home/kiran/bin/ffmpeg";
  
      echo exec("$ffmpeg -f image2 -framerate 2/1 -pattern_type glob -i \"/var/www/html/fftest/getthumbnail/tmp/animate/est/*.jpg\" -i \"/var/www/html/fftest/getthumbnail/audios/audio1.mp3\" -c:v libx264 -c:a copy -shortest  -s 1920x1080 -r 60 -vf \"format=yuv420p\" \"/var/www/html/fftest/getthumbnail/output/animatedaudiocolor21.avi\" 2>&1" , $output, $return);
  
  ?>

  As you can see I am using -pattern type glob to select all the images, but this is getting confused with he naming sequence of kiran-0, kiran-1.

  So, what I am expecting here is how can I use writeimage object o name my images as the way mentioned above. so that I can use kiran%03d.jpg in my ffmpeg command instead of *.jpg.

  Or if any one can help me providing a code so that I can rename all the images in the expected manner.I tried the below code to rename all images :

  <?php
  
  $fileFolder="/fftest/getthumbnail/tmp/animate/test";
  
  $directory = $_SERVER['DOCUMENT_ROOT'].$fileFolder.'/';
  
  
  
  $i = 001; 
  
  $handler = opendir($directory);
  
  while ($file = readdir($handler)) {
  
      if ($file != "." && $file != "..") {
  
          $newName = 'kiran'.$i ;
  
          rename($directory.$file, $directory.$newName); // here; prepended a $directory
  
          $i++;
  
      }
  
  }
  
  closedir($handler);
  
  
  
  ?>

  But the code is unable to rename the images in sequence.

  Help please...

• avfilter/lut3d : fix channel order in Iridas format parsing.

  4 janvier 2014, par Clément Bœsch

  avfilter/lut3d : fix channel order in Iridas format parsing.
  According to http://doc.iridas.com/index.php?title=LUT_Formats
      for 3D textures, the data is also RGB, and ordered in such a way
  
      that the red coordinate changes fastest, then the green coordinate,
  
      and finally, the blue coordinate changes slowest :
  Fixes Ticket #3236.
  

  • [DH] libavfilter/vf_lut3d.c

• Decode H.264 stream from live555 using ffmpeg

  3 septembre 2013, par Straticiuc Vicu

  I try to decode H.264 frames for an IP Camera that uses onvif. For this i am using example testRTSPClient from live555. In FAQ is said that function afterGettingFrame() is called every time a new packet came in buffer and that packet is an NAL unit. On live555 part everything looks good. Now for decoding i am using ffmpeg and the frame i pass to the decoder are formed like discribed Here. Now my problem is that the ffmpeg is unable to decode my frames and i am getting errors like :

  top block unavailable for requested intra4x4 mode -1 at 18 0
  
  error while decoding MB 18 0
  
  no picture 
  
  P sub_mb_type 13 out of range at 2 3

  What am i doing wrong with ffmpeg ?

  PS. example of I-Frame passed to ffmpeg Here

   with:
  
   red   is startcode
  
   green is SPS info
  
   black is PPS info 
  
   blue  is I-Frame delivered by live555