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• facing problem in downloading the audio data of a trimmed youtube video using youtube-dl and ffmpeg libraries

  15 mai 2022, par rkc

  I'm trying to download the audio content of a trimmed YouTube video using youtube-dl (v2021.12.17) and FFmpeg (v4.2.2) libraries in python, on Windows 10 PC. I am able to download the audio data when the command is executed on the Pycharm terminal, but not able to download the same content when using os.system() command.

  


  For example, I'm able to download the data when I execute

  


  "ffmpeg -ss 30 -t 10 -i $(youtube-dl -f best -g https://www.youtube.com/watch?v=3NGZcpAZcl0) -- output1.wav"


  


  command on the Pycharm terminal.

  


  But, i'm getting an error, when I try to execute the same in the Editor window as shown below,

  


  os.system('ffmpeg -ss 30 -t 10 -i $(youtube-dl -f best -g https://www.youtube.com/watch?v=3NGZcpAZcl0) -- output1.wav')

error: $(youtube-dl: No such file or directory


  


  I also tried enclosing the $() link in quotes and then executed it. But, after doing this, I am getting a different error as shown below

  


  os.system('ffmpeg -ss 30 -t 10 -i "$(youtube-dl -f best -g https://www.youtube.com/watch?v=3NGZcpAZcl0)" -- output1.wav')

error: $(youtube-dl -f best -g https://www.youtube.com/watch?v=3NGZcpAZcl0): Invalid argument


  


  So, can any of you help me in resolving this error ?

  


• How to downsample all the videos in a folder ?

  23 mai 2021, par amarykya_ishtmella

  I had asked this question before, I have a solution using the moviepy library. But, this is taking a lot of time.
  
I know that when I use ffmpeg via the terminal, the down sampling process is much faster.

  


  command = (
            f"ffmpeg -n -i {'inputvideo_path'} -filter:v "
            f"scale={width}:{height} {{}}-c:a copy {output_path}"
        )


  


  I am looking for the implementation in ffmeg library

  


• Shall_exec() is not working in Cent OS 6.5 with php 5.5

  5 décembre 2014, par hitesh

  It is the follow up from the question here. I was not sure if it was good idea to edit that question, So I am asking a new question here

  As explained in my previous question I am using ffmpeg for getting screenshot from video.it seems to working fine in my local but in my Cent OS 6.5 server it is not working, it throws error that
  ffmpeg extension is not enabled.

  "Error in Loading ffmpeg"

  To debug this, I commented the line

    extension_loaded('ffmpeg') or die('Error in loading ffmpeg');

  and I found out that in Cent OS terminal, ffmpeg command were working but if I use it with full path as I am doing in windows it did not work.So i deleted full path and used ffmpeg alone, I am not sure what was the reason behind this.

  Here is my new command

    $cmd = "ffmpeg -i $vid -an -ss $getfromsecond -s $size -vframes 1 $imageFile";
  
      $cmd2 = "ffmpeg -i $remoteVideo -an -ss $getfromsecond -s $size -vframes 1 $imageFile2 ";
  
      echo $cmd ."<br />";
  
      echo $cmd2."<br />";
  
  exec($cmd, $output, $return);
  
  echo '$output :' ; print_r($output); echo "<br />";echo '$return' . $return . "<br />";
  
  
  
  if ($return != 0) {
  
      // an error occurred
  
      echo "Error in EXEC command ";
  
  }
  
  
  
  if(!shell_exec($cmd2)){
  
      echo "Remote video Thumbnail created". "<br />";
  
  }else{
  
      echo "Error Creating Remote video thumbnail". "<br />";
  
  }

  now again it was not working in server, but when I tried both command

   `     echo $cmd ."<br />";
  
  
  
          echo $cmd2."<br />";` 

  in dev terminal, it got executed successfully I could see the screenshot.

  So while searching for the problem, I found this question here based on this answer here. I understood that some server may not allow it so I checked it.

   if (isEnabled('shell_exec')) {
  
      echo "Shell_exec is enabled "."<br />";
  
      shell_exec('echo "hello world"');
  
      echo "<br />";
  
  }else{
  
  
  
      echo "shell exec command is not allowed";
  
  }

  I got the output "Shell_exec is enabled " but shell_exec('echo "hello world"'); does not seems to work, Also when I run the command directly in terminal it works.

  Help me find the issue here, is it issue with shall_exec() or something else ?

  Any help is appreciated. Thanks