param (
    [Parameter(Mandatory=$true)]
    [string]$dir
)

# Check if the directory exists
if (!(Test-Path -Path $dir -PathType Container)) {
    Write-Host "Directory $dir does not exist."
    exit 1
}

# Get all .webp files
$files = Get-ChildItem -Path $dir -Filter "*.webp"

# Process each file
foreach ($file in $files) {
    $inputFile = $file.FullName
    $outputFile = Join-Path $file.DirectoryName ($file.BaseName + ".png")

    # Run ffmpeg command
    & ffmpeg -i $inputFile $outputFile

    # Check if the conversion was successful
    if ($?) {
        # Delete the input .webp file
        Remove-Item -Path $inputFile
    } else {
        Write-Host "ffmpeg failed for $inputFile. Continuing with next file."
    }
}