conversion from mp3 to ogg using php

Question

I want to convert mp3 file to ogg. I tried the following code

exec("/usr/local/bin/ffmpeg -i 1.mp4 -vcodec libtheora -acodec libvorbis testjohn4545454.ogg",$output);
var_dump($output);

But it does not convert the file and it only returns array(0) { } and it only takes a little execution time.

But the conversion is success when using ssh command.

Please give me solution.

Answer 1

Thank you for the replies. I used passthru() instead of exec() and it works fine.