parameters & quotes when running external programs

[daedo 0]

I am new to Autoit having used autohotkey before. I am stuck on how to  select a video file and play it with mplayer,

I searched the forums but couldnt find the answer. here is my simplified script 

#include <GUIConstants.au3>
#include <String.au3>
#include <Array.au3>
#include <Constants.au3>
#include <File.au3>

;global $playingfile = '"C:\some file.mp4"'

global $selectedfile = FileOpenDialog ( "open","","All (*.*)") 


;$mplayerpid = Run ( "mplayer.exe -slave -quiet " & '"C:\some file.mp4"' );this works
;$mplayerpid = Run ( 'mplayer.exe -slave -quiet ' & $playingfile ); this works
$mplayerpid = Run ( 'mplayer.exe -slave -quiet ' & '"'& $selectedfile &'"' ); this and many variations doesnt

The problem is selecting the file, taking account of the fact it and  / or the path may have a space in it so it must have quotes around it to work

I have remarked out 'fixed' options that do actually work

Thanks in advance for any help

[gruntydatsun 12]

$mplayerpid = Run ('mplayer.exe -slave -quiet "' & $selectedfile & '"')

should work fine.

can you go Start>Run>mplayer.exe and it launches mplayer?  perhaps mplayer is not on your PATH environment variable.

Try pointing directly to the mplayer executable:

$mplayerpid = Run ('C:\path\goes\here\mplayer.exe -slave -quiet "' & $selectedfile & '"')

or if there's spaces in the path to your mplayer.exe

$mplayerpid = Run ('"C:\path with spaces\goes\here\mplayer.exe" -slave -quiet "' & $selectedfile & '"')

Edited October 10, 2013 by gruntydatsun

[daedo 0]

Many thanks gruntydatsun,, the problem was pointing to mplayer, it was in the working directory, but the full path sorted it