How can i execute a command from a ruby class file.

Hi,

I am using ffmpeg plugin to convert one mime type into another mime
type. It works fine when i execute it directly in the command prompt by
typing the command. But thats not my requirement. I want to run that
command from a ruby class file. first i should call that ruby file. then
from there i should automatically execute that command. Can anyone get
me a solution for this.

thanks,

with regards,
barak
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