Tif-Dateien mit mehreren Frames drehen

param(
    [parameter(mandatory=$true)][ValidateScript({Test-Path $_})][string]$imagepath
)
Add-Type -AssemblyName System.Drawing
$newpath = "$([System.IO.Path]::GetDirectoryName($imagepath))\$([System.IO.Path]::GetFileNameWithoutExtension($imagepath))_180.tif"  

try{
    $encFlag = [System.Drawing.Imaging.Encoder]::SaveFlag
    $codec = [System.Drawing.Imaging.ImageCodecInfo]::GetImageEncoders() | ?{$_.MimeType -eq 'image/tiff'}  
    $encParam = new-object System.Drawing.Imaging.EncoderParameters (1)

    $img = [System.Drawing.Image]::FromFile($imagepath)
    $dim = New-Object System.Drawing.Imaging.FrameDimension($img.FrameDimensionsList.Guid)
    $max = $img.GetFrameCount([System.Drawing.Imaging.FrameDimension]::Page) -1

    0..$max | %{
        $tmp = $img.Clone()
        $tmp.SelectActiveFrame($dim,$_) | out-null
        $tmp.RotateFlip([System.Drawing.RotateFlipType]::Rotate180FlipNone) | out-null
    
        if ($_ -eq 0){
            $encParam.Param = New-Object System.Drawing.Imaging.EncoderParameter ($encFlag,[System.Drawing.Imaging.EncoderValue]::MultiFrame.value__)
            $tmp.Save($newpath,$codec,$encParam) | out-null
            $newimg = $tmp
        }else{
            $encParam.Param = New-Object System.Drawing.Imaging.EncoderParameter ($encFlag,[System.Drawing.Imaging.EncoderValue]::FrameDimensionPage.value__)
            $newimg.SaveAdd($tmp,$encParam) | out-null
        }
        if ($_ -eq $max){
            $encParam.Param = New-Object System.Drawing.Imaging.EncoderParameter ($encFlag,[System.Drawing.Imaging.EncoderValue]::Flush.value__)
            $newimg.SaveAdd($encParam) | out-null
            $newimg.Dispose()
        }
    }
    write-host "Tiff wurde um 180° gedreht und wurde hier gespeichert: '$newpath'" -F Green  
}catch{
    throw $_.Exception.Message
}finally{
    $tmp.Dispose()
    $img.Dispose()
    [System.GC]::Collect()
}

powershell -Executionpolicy ByPass -File "C:\Pfad\tiff-rotate.ps1" "C:\PfadZumFax\bildXYZ.tif"