converttoav1.ps1

param(
    [Parameter(Mandatory = $true)]
    [string]$Source,

    [Parameter(Mandatory = $true)]
    [string]$Destination,

    [int]$Bitrate = 40,

    [ValidateSet("speed", "balanced", "quality", "high_quality")]
    [string]$Quality = "quality"
)

$Source = $Source.TrimEnd('\')
$Destination = $Destination.TrimEnd('\')
$BufSize = "$($Bitrate * 3)M"

if (-not (Test-Path $Destination)) {
    New-Item -ItemType Directory -Path $Destination | Out-Null
}

$validExtensions = ".mp4", ".mov", ".mkv", ".avi", ".mpq"

$videos = Get-ChildItem -Path $Source -File | Where-Object {
    $validExtensions -contains ($_.Extension -as [string]).Trim().ToLower()
}

if ($videos.Count -eq 0) {
    Write-Host "Aucun fichier vidéo trouvé dans '$Source'"
    exit
}

# ? -c:a aac -b:a 128k `

foreach ($file in $videos) {
    $inputFile = $file.FullName
    $baseName = $file.BaseName
    $outputFile = Join-Path $Destination "$baseName.av1.mkv"

    if (Test-Path $outputFile) {
        Write-Host "Déjà converti : $outputFile"
        continue
    }

    Write-Host "Encodage : $file.Name → $outputFile (vbr=$Bitrate Mbps, quality=$Quality)"

    ffmpeg -hide_banner -y -i "$inputFile" `
	    -map 0 `
        -map_metadata 0 -movflags use_metadata_tags `
        -c:v av1_amf `
            -usage transcoding `
            -quality $Quality `
            -rc vbr_peak `
            -b:v ${Bitrate}M -maxrate ${Bitrate}M -bufsize $BufSize `
            -pix_fmt yuv420p `
        -c:a copy `
		-c:s copy `
        "$outputFile"
}