script to convert avisynth scripts into avi dummies

$MakeAVIS_Path = "C:\Program Files (x86)\ffdshow\makeAVIS.exe";
$MakeAVIS_Timeout = 3 # seconds

#----------------------------------------------------------------------
function Select-Folder($Message = 0, $Path = 0)
{
    $FolderSelectionDlg = New-Object -comObject Shell.Application
    $Folder = $FolderSelectionDlg.BrowseForFolder(0, $Message, 0, $Path)
    if($Folder -ne $null)
    {
        $Folder.self.Path
    }
}

#----------------------------------------------------------------------
# Main script body

# check provided makeAVIS path
$FileExists = Test-Path $MakeAVIS_Path
if($FileExists -eq $False)
{
    [Console]::WriteLine("Путь к makeAVIS указан неверно (""" + $MakeAVIS_Path + """).");
    exit;
}

# rise folder selection dialogs for source and output folders
$ScriptsFolderPath = Select-Folder("Выберите папку с avisynth скриптами");
if($ScriptsFolderPath -eq $null)
{
    exit;
}
$OutputFolderPath = Select-Folder("Выберите папку для avi-пустышек");
if($OutputFolderPath -eq $null)
{
    exit;
}

[Console]::WriteLine("Обрабатываем avisynth скрипты в """ + $ScriptsFolderPath + """");
$FileEntries = [IO.Directory]::GetFiles($ScriptsFolderPath);
$FilesCount = 0;
foreach($FilePath in $FileEntries)
{
   if($FilePath.ToLower().EndsWith(".avs"))
   {
        $iFileNameStart = $FilePath.LastIndexOf("\");
        $OutputFilePath = $OutputFolderPath + $FilePath.Substring($iFileNameStart, $FilePath.Length - 4 - $iFileNameStart) + ".avi";

        # command line arguments for makeAVIS
        # input script                  output video                    store input script in .avi dummy
        # -i "C:\\Temp\TestVideo.avs"   -v "C:\\Output\TestVideo.avi"   -s 1
        $makeAVIS_Args = " -i """ + $FilePath + """ -v """ + $OutputFilePath + """ -s 1";

        [Console]::WriteLine($FilePath.Substring($iFileNameStart + 1, $FilePath.Length - 1 - $iFileNameStart));
        $MakeAVIS_Process = Start-Process -FilePath $MakeAVIS_Path -ArgumentList $makeAVIS_Args -WindowStyle Hidden -PassThru
        Wait-Process -InputObject $MakeAVIS_Process -Timeout $MakeAVIS_Timeout -ErrorAction SilentlyContinue
        Stop-Process -InputObject $MakeAVIS_Process -Force
        $FilesCount = $FilesCount + 1;
   }
}
[Console]::WriteLine("Обработано " + $FilesCount + " файлов.");
[Console]::WriteLine("^_^");