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• How to concatenate two or more videos with different width in FFMpeg and to maintain the same aspect ratio ?

  23 octobre 2019, par Aarwil

  I have five video parts to concat all. Each five videos are in the same width and height. The second part is the hstack of another 2 videos and the third part is the hstack and vstack of another 3 videos. While concat all the five video parts the aspect ratio is not maintaining in the final video. Since I am new to ffmpeg help me to sort out the problem

  I have tried with the command with filter complex and to reduce the size I used frame per second.

  "ffmpeg -i
  RM356ce8c15f47cb07b7af885fd718a39f/final/RM356ce8c15f47cb07b7af885fd718a39f.mp4 -vf scale=1280:480 -filter:v fps=fps=30 E :\test\routes\public\assets\downloads\RM356ce8c15f47cb07b7af885fd718a39f/final/RM356ce8c15f47cb07b7af885fd718a39f.mp4"

  Only ’-vf fps=fps=30’ read, ignoring remaining -vf options : Use ’,’ to separate filters

• How to know system command is in use in php ?

  13 juin 2019, par flash

  I have a HTML/PHP code as shown below in which on click of a button conversion of mp4 into mp3 starts happening.

  HTML/PHP Code :

     <?php  foreach ($programs as $key => $program) {  ?> 
  
         <tr data-index="&lt;?php echo $key; ?>">
  
            <td><input type="submit" value="Go" data-id="&lt;?php echo $key; ?>" /></td>
  
         </tr>
  
      &lt;?php }?>

  Php code (where mp4=>mp3 conversion happens) :

  $f = $mp4_files[$_POST['id']];
  
  $parts = pathinfo($f);  
  
  switch ($parts['extension'])
  
  {  
  
  case 'mp4' :
  
  $filePath = $src_dir . DS . $f;
  
  system('C:\ffmpeg\bin\ffmpeg.exe -i ' . $filePath . ' -map 0:2 -ac 1 ' . $destination_dir . DS . $parts['filename'] . '.mp3', $result); 
  
  break;  
  
  }

  As soon as the button is clicked from the HTML/PHP Code above, the text gets changed from Go to Converting in the UI because I have added JS/jQuery code in my codebase but this JS/jQuery code which I have added just change the text only.

  It doesn’t actually know that the Conversion is happening in the background.

  JS/jQuery code :

  $("input[name='go-button']").click( function() {
  
  
  
    // Change the text of the button, and disable
  
    $(this).val("Converting").attr("disabled", "true");
  
  
  
  });

  Problem Statement :

  I am wondering what modification I need to do in the JS/jQuery code above so that UI actually knows that conversion is happening in the background.

  Probably, we need to add make establish some connection between JS/jQuery and php code above but I am not sure how we can do that.

• ffmpeg alternative to -ss to something with % ? [duplicate]

  9 juin 2020, par Akhilleus Uggo

  Is there anyway to start cutting a video, or indicate the start point by a percent of the video ?

  



  Let's suppose a video has a duration of 40 minutes. Starting at 25% of the video would be -ss 600, but not all videos are 40 minutes.

  



  Any replacement for -ss to something working by % ?