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• How to set Avconv constant bitrate to output flv file ?

  5 novembre 2012, par ispasov

  I am trying to encode a flv file which has bitrate 512k. I have created the folowing command :

  avconv -i input_file.mpg -f flv -c:v flv -b:v 512k -c:a libmp3lame -b:a 64k -ar 44100 -s 400x300 ouput_file.flv

  During the encodding the terminal shows higher bitrate - from 650k falling to 580k.
  After the file has finnished encodding I can't see in it's properties the bitrate - it is N/A.

  I have tried -minrate and -maxrate options but no result also.

  Can someone help me with that ?

• FFmpeg add proxy to request

  28 septembre 2024, par P1NG2WIN

  Does FFmpeg support the ability to add a proxy to a request ? On the Internet, I found that there is the -http_proxy option, but when I tried to use it by typing ffmpeg -http_proxy=http://ip:port/ in terminal, I received an Option not found error

  


• ffmpeg in AWS EBS Php Environment

  3 janvier 2018, par Shihas

  I did a project in Codeigniter framework and uploaded to AWS EBS Php environment.

  In the below function I’m trying to create a thumbnail for the uploading video using ffmpeg.

  function test()
  
  {
  
      if($_FILES['video']['name'])
  
      {
  
          $extension = pathinfo($_FILES['video']['name'], PATHINFO_EXTENSION);
  
  
  
          $video_file = 'vid_'.time().rand(0,10000000);
  
          $video_file_name = $video_file.'.'.$extension;
  
          $video_thumb = $video_file.'.png';
  
  
  
          $path = base_url('/assets/portfolio_video/').$video_file_name;
  
          move_uploaded_file($_FILES["video"]["tmp_name"],$path);
  
          echo shell_exec("/usr/bin/ffmpeg -i /home/ubuntu/project/assets/portfolio_video/$video_file_name -ss 00:00:02.000 -vframes 1 /home/ubuntu/project/assets/thumbnail/$video_thumb");
  
  
  
          echo "File Name: ".$video_file_name."";
  
          echo "<img src="http://stackoverflow.com/feeds/tag/&#034;.base_url(&#034;assets/thumbnail/&#034;).$video_thumb.&#034;" style='max-width: 300px; max-height: 300px' />";
  
      }else{
  
          $this->load->view('test');
  
      }
  
  }   

  Here the problem was the video file itself not uploading. I just want to know why its not uploading files in AWS. But it works fine in my local server.

  Now I try to create a thumbnail for the already existing video in the server.

  Path of video file : /home/ubuntu/123.mp4

  Code executed :

  function test()
  
  {
  
      echo shell_exec("/usr/bin/ffmpeg -i /home/ubuntu/123.mp4 -ss 00:00:02.000 -vframes 1 /home/ubuntu/thumbnail.png");
  
  }

  But still the thumbnail is not creating.

  NOTE : When I execute the terminal command ffmpeg -i /home/ubuntu/123.mp4 -ss 00:00:02.000 -vframes 1 /home/ubuntu/thumbnail.png directly in the AWS server terminal its create the thumbnail successfully.