bmwkraftur.is

$tool = 'C:\Program Files\gs\gs9.02\bin\gswin32c.exe'
$pdfs = get-childitem . -recurse | where {$_.Extension -match "pdf"}

foreach($pdf in $pdfs)
{

    $jpg = $pdf.FullName.split('.')[0] + '.jpg'
    if(test-path $jpg)
    {
        "jpg file already exists " + $jpg
    }
    else       
    {   
        'Processing ' + $pdf.Name       
        $param = "-sOutputFile=$jpg"
        & $tool -q -dNOPAUSE -sDEVICE=jpeg $param -r300 $pdf.FullName -c quit
    }
}