How to convert videos with ffmpeg

Question

I want to convert a video from one format to another using ffmpeg. I try lots of code but it does not convert the video.

For example:

exec(\"

Answer 1

Display FFMPEG Error Output:

Command Line:

$command = "ffmpeg -i mickey.flv -ar 22050 -ab 32 -f avi -s 320x240 mickey.avi ";

exec($command . ' 2>&1', $output);

print_r($output);