title: Why the converted videos file size is greater than original file size?
body: <p>I am using ffmpeg to convert the videos into mp4.Its working fine  and its playing with high quality.No problem.But the worst case is I uploaded 14Mb file and after converting it goes to 30 Mb file.I am using the following the script to convert</p>
  
  <pre><code>exec("ffmpeg -i videowithaudio.flv -vcodec libx264 -vpre hq -vpre ipod640 -b 250k -bt 50k -acodec libfaac -ab 56k -ac 2 -s 480x320 video_out_file.mp4 &gt; output1.txt 2&gt; apperror1.txt");   //webkit compatible
  </code></pre>
  
  <p>I am using PHP for executing this command.Could you please help me how to reduce the file size from this 30Mb (nearly to uploaded file size is ok) with same quality.</p>