Join Video Files with FFMPEG and PowerShell

Join-VideoDirectory.ps1

Function Join-VideoDirectory {
    $fileArray = New-Object System.Collections.ArrayList
    $items = Get-childitem *.mkv,*.vob,*.mp4,*.ts
    $itemCount = $items.Count
    $i = 0
    $cmdScript = ""

    ForEach ($item in $items){
        $i++
        $cmdScript += "ffmpeg -i `"$($item.Name)`" -f mpegts -c copy file-0$i.mpeg.ts`n"
        $fileArray.Add("file-0$i.mpeg.ts")
    }
    
   
    $cmdScript+="ffmpeg -isync -i `"concat:$($fileArray -join '|')`" -f matroska -c copy output.mkv"
    
    Invoke-Expression $cmdScript     

}