Convert Elite Dangerous screenshots to PNG and set creation date as XMP metadata.

convert-ed-screenshots.ps1

Get-ChildItem "$([Environment]::GetFolderPath("MyPictures"))\Frontier Developments\Elite Dangerous" -Filter "*.bmp" |
Foreach-Object {
  $dir = $_.DirectoryName
  $base = $_.BaseName
  $originalDate = $_.CreationTimeUtc
  $destination = "$($dir)/PNG/$($base).png"
  $result = "" | select name, converted, setMetadata
  $result.name = $base
  $result.converted = $false

  if (!(Test-Path -Path $destination)) {
    # Write to PNG with an embedded sRGB profile.
    D:\bin\ImageMagick\convert.exe $_.FullName -profile D:\sRGB2014.icc "$($dir)/PNG/$($base).png"
    $result.converted = $true
  }

  # Write the original file creation date as XMP metadata. That is what Adobe Bridge seems to react to best,
  # and it is not impossible to read back later. Fractional seconds appear to get dropped, but wo really cares.
  $originalDateString = $originalDate | Get-Date -Format "yyyy:MM:dd HH:mm:ss.ff\Z"
  D:\bin\exiftool.exe -q -if 'not defined $xmp:dateTimeOriginal' -xmp:dateTimeOriginal="$($originalDateString)Z" $destination
  $result.setMetadata = $?

  $result
}

Assumes ImageMagick executables in D:\bin\ImageMagick\ and D:\bin\exiftool.exe