Convert PDF to GIF

Convert-PdfToGif.ps1

function Convert-PdfToGif($pdfpath) {
    $pdf = Get-Item $pdfpath

    $name = $pdf.BaseName

    pdftoppm -png "$($pdf.FullName)" $name

    $pngs = Get-ChildItem "$name-*.png"

    $num = [math]::Ceiling([math]::Log10($pngs.Length + 1))

    $format = "%0" + $num + "d"
    
    # converting to gif directly makes a large file, so convert to mp4 first to optimize
    ffmpeg -y -framerate 1/1.5 -start_number 1 -i "$name-$format.png" "$name.mp4"

    ffmpeg -y -i "$name.mp4" -filter_complex "[0:v] fps=2,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" -loop 0 "$name.gif"

    Remove-Item "$name-*.png"
    Remove-Item "$name.mp4"
}