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• PHP Run FFMPEG in background, and find out when it's done [closed]

  27 septembre 2012, par toms900

  Possible Duplicate :
  Run a ffmpeg process in the background

  I was wondering if there's any easy way to runn and ffmpeg process in the background so people can leave the page. And if you do that, then tell if the ffmpeg process is running, and when it's done, update the database to "finished". I'll post my code if I need to. Thanks !
  Here's the code on the processing page :

  <?php
  
  $name = $_FILES['upload_file']['name'];
  
  $type = $_FILES['upload_file']['type'];
  
  $size = $_FILES['upload_file']['size'];
  
  $tmpname = $_FILES['upload_file']['tmp_name'];
  
  
  
  if (!$title) {
  
      $title = $name;
  
  }
  
  
  
  if (!$description) {
  
      $description = "No description available.";
  
  }
  
  
  
  $string = substr(str_shuffle(str_repeat('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789',10)),0,10);
  
  $videoname = "$string.mp4";
  
  $date = date("F d, Y"); // October 09, 2010
  
  $srcFile = $tmpname;
  
  mkdir("users/$usercode/uploads/$string");
  
  mkdir("users/$usercode/uploads/$string/HD");
  
  mkdir("users/$usercode/uploads/$string/regular");
  
  mkdir("users/$usercode/uploads/$string/mobile_upload");
  
  mkdir("users/$usercode/uploads/$string/thumbnails");
  
  $destFile1 = "/users/$usercode/uploads/$string/HD/$string.mp4";
  
  $destFile2 = "/users/$usercode/uploads/$string/regular/$string.mp4";
  
  $destFile3 = "/users/$usercode/uploads/$string/mobile_upload/$string.mp4";
  
  $ffmpegPath = "/usr/local/bin/ffmpeg"; 
  
  $flvtool2Path = "/usr/bin/flvtool2";
  
  $yamdiPath = "/usr/bin/yamdi";
  
  $mp4boxPath = "/usr/local/bin/MP4Box";
  
  // Create our FFMPEG-PHP class 
  
  $ffmpegObj = new ffmpeg_movie($srcFile); 
  
  // Save our needed variables 
  
  $srcWidth = $ffmpegObj->getFrameWidth(); 
  
  $srcHeight = $ffmpegObj->getFrameHeight(); 
  
  $srcFPS = $ffmpegObj->getFrameRate(); 
  
  $srcAB = $ffmpegObj->getAudioBitRate();  
  
  $srcAR = $ffmpegObj->getAudioSampleRate(); 
  
  $res = $srcWidth . "x" . $srcHeight; 
  
  // Call our convert using exec() 
  
  $iphone1 = getcwd().$destFile1;
  
  $iphone2 = getcwd().$destFile2;
  
  $iphone3 = getcwd().$destFile3;
  
  $low = "854x480";
  
  $local_img = "/users/$usercode/uploads/$string/thumbnails/$string.jpg";
  
  $img = getcwd().$local_img;
  
  $img = preg_replace('/ /','\ ',$img); 
  
  $thumb = "$string.jpg"; 
  
  $cmd = "$ffmpegPath -i $tmpname 2>&1";  
  
  if (preg_match('/Duration: ((\d+):(\d+):(\d+))/s', `$cmd`, $time)) {  
  
      $total = ($time[2] * 3600) + ($time[3] * 60) + $time[4];  
  
      $interval = rand(0, $total);  
  
  }  
  
  
  
  $img = shell_exec("$ffmpegPath -ss $interval -i $tmpname 2>&1 -s 120x90 -f mjpeg -vframes 1 $img");
  
  
  
  
  
  if ($srcWidth >= 1280 && $srcHeight >= 720) {
  
      $out1 = shell_exec("$ffmpegPath -i $tmpname -f mp4 -vcodec libx264 -vpre normal -ab $srcAB -ar $srcAR -b 5000k -r $srcFPS -s $res -acodec libfaac $iphone1");
  
      $out2 = shell_exec("$mp4boxPath -inter 0.5 $iphone1");
  
      $out3 = shell_exec("$ffmpegPath -i $tmpname -f mp4 -vcodec libx264 -vpre normal -ab $srcAB -ar $srcAR -b 2000k -r $srcFPS -s $low -acodec libfaac $iphone2");
  
      $out4 = shell_exec("$mp4boxPath -inter 0.5 $iphone2");
  
      $out5 = shell_exec("$ffmpegPath -i $tmpname -f mp4 -vcodec libx264 -vpre slow -ab 64k -ar 44100 -b 500k -r 30 -s $low -acodec libfaac $iphone3");
  
      $out6 = shell_exec("$mp4boxPath -inter 0.5 $iphone3");
  
      echo 1;
  
  }
  
  else {
  
      $out3 = shell_exec("$ffmpegPath -i $tmpname -f mp4 -vcodec libx264 -vpre normal -ab 64k -ar 44100 -b 500k -r 30 -s $low -acodec libfaac $iphone2");
  
      $out4 = shell_exec("$mp4boxPath -inter 0.5 $iphone2");
  
      $out5 = shell_exec("$ffmpegPath -i $tmpname -f mp4 -vcodec libx264 -vpre slow -ab 64k -ar 44100 -b 500k -r 30 -s $low -acodec libfaac $iphone3");
  
      $out6 = shell_exec("$mp4boxPath -inter 0.5 $iphone3");          
  
      echo 1;
  
  }
  
  function generate_random($number_of_characters)
  
  {
  
          $characters = array();
  
          $randomchar = "";
  
          $x = 0;
  
          for($i = 48; $i < 123; $i++)
  
          {
  
                  if(ctype_alnum(chr($i)))
  
                  {
  
                          $characters[$x] = chr($i);
  
                          $x++;
  
                  }
  
          }
  
          for($i = 0; $i < $number_of_characters; $i++)
  
          {
  
                  $randomchar .= $characters[rand(0, count($characters) - 1)];
  
          }
  
          return $randomchar;
  
  }
  
  ?>

• ffmpeg : Could not find codec parameters for stream 0 (Video : h264) unspecified size [on hold]

  15 février 2014, par dempap

  I try to convert a video from .raw to .mp4. For this reason I did download, build and install both x264 and ffmpeg. However, command :

  ffmpeg -f h264 -i output.raw -vcodec copy output.mp4

  fails with error (shown in picture below). Is there any way to fix this ?

  

• Making a video with opencv and ffmpeg. How to find the right color format ?

  19 décembre 2014, par luc

  I have a webcam video recorder program built with python, opencv and ffmpeg

  It works ok except that the color of the video is more blue than the reality. The problem seems to come from color format of images.

  It seems that OpenCv is giving BGR images and ffmpeg+libx264 is expecting YUV420p. I’ve read that YUV420p correspond to YCbCr.

  opencv has no conversion from BGR to YCbCr. It only has a conversion to YCrCb.

  I have made some searchs and tried different alternatives to try converting opencv image to something that could be ok for ffmpeg+libx264. None is working. At this point, I am a bit lost and I would appreciate any pointer that could help me to fix this color issue.