Concatenating backticks will attempt to run each of those independently and simply concatenate the results. Join them together inside the ``. 
$directoryListing = `vlc home/muze/sound.avi`;

[download]
Also, as your script stands right now, your executing vlc independently of the fact that you're forking later.

In reply to Re: Passing Process the Argument using fork() by wind
in thread Passing Process the Argument using fork() by muze

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