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• FFmpeg code not working on http url for thumbnail extraction

  1 August 2014, by user2240379

  I am trying to extract thumbnail from sharepoint 2013 video library. I found a link which can extract using ffmpeg. this is the link:
  [How can I save first frame of a video as image?

  filename = "http://siteurl/" + items["FileRef"].ToString();

  When i replaced the input file with sharepoint site url and video name then it does not produce any thumbnail. I also gives error on

  ffmpeg.Start();
  
          ffmpeg.WaitForExit();
  
          ffmpeg.Close()

  I would like to understand how make it work for http url.
  If it is not possible to use url in ffmpeg can anyone suggest another method to achieve thumbnail.(as i want the thumbnail to be set automatically using 1st frame from of video if it not set manually)

• How to convert this php code to javascript

  5 October 2019, by Salman

  I have this php code to check the progress percentage of a ffmpeg video conversion. Basically ffmpeg command generates a log file named "output.txt" from where i can estimate the percentage with the help of this code. I want to create a javascript code where i can directly estimate the percentage from the log file.

  $content = @file_get_contents('output.txt');
  
  
  
  if ($content) {
  
      //get duration of source
  
      preg_match("/Duration: (.*?), start:/", $content, $matches);
  
  
  
      $raw_duration = $matches[1];
  
  
  
      //raw_duration is in 00:00:00.00 format. This converts it to seconds.
  
      $array_reverse = array_reverse(explode(":", $raw_duration));
  
      $duration      = floatval($array_reverse[0]);
  
      if (!empty($array_reverse[1]))
  
          $duration += intval($array_reverse[1]) * 60;
  
      if (!empty($array_reverse[2]))
  
          $duration += intval($array_reverse[2]) * 60 * 60;
  
  
  
      //get the time in the file that is already encoded
  
      preg_match_all("/time=(.*?) bitrate/", $content, $matches);
  
  
  
      $raw_time = array_pop($matches);
  
  
  
      //this is needed if there is more than one match
  
      if (is_array($raw_time)) {
  
          $raw_time = array_pop($raw_time);
  
      }
  
  
  
      //raw_time is in 00:00:00.00 format. This converts it to seconds.
  
      $array_reverse = array_reverse(explode(":", $raw_time));
  
      $time          = floatval($array_reverse[0]);
  
      if (!empty($array_reverse[1]))
  
          $time += intval($array_reverse[1]) * 60;
  
      if (!empty($array_reverse[2]))
  
          $time += intval($array_reverse[2]) * 60 * 60;
  
  
  
      //calculate the progress
  
      $progress = round(($time / $duration) * 100);
  
  
  
      echo $duration;
  
      echo $time;
  
      echo $progress;
  
  }

• Revision fbf052df42: Clean up 4x4 coefficient decoding code. Don't use vp9_decode_coefs_4x4() for 2n

  8 December 2012, by Ronald S. Bultje

  Changed Paths: Modify /vp9/decoder/vp9_detokenize.c Clean up 4x4 coefficient decoding code. Don't use vp9_decode_coefs_4x4() for 2nd order DC or luma blocks. The code introduces some overhead which is unnecessary for these cases. Also, remove variable declarations that are only used once, (...)