Convert all files to h.264 for Plex direct play, eliminate transcoding.

convert_for_plex.ps1

Get-ChildItem -Recurse -File | ForEach-Object {

	$tempName = "$($PSItem.Directory)\temp_$($PSItem.Name)"
	$realName = $PSItem.FullName

	$codec = & ffprobe.exe -v error -select_streams v:0 -show_entries stream=codec_name -of default=noprint_wrappers=1:nokey=1 $PSItem
	if ($codec -eq "hevc") {
		Write-Output "$codec : $PSItem"
		& ffmpeg.exe -hwaccel cuda -i $realName -pix_fmt yuv420p -map 0:v:0 -map 0:a? -map 0:s? -c:v h264_nvenc -c:a copy -c:s copy $tempName 2>&1
		Remove-Item -LiteralPath $realName
		Rename-Item $tempName $realName
	}
}