Convert Media Sources to lossless VP9 WEBM with transparency

media_to_vp9.bat

@echo off

setlocal EnableDelayedExpansion
for %%a in (*.webm *.mkv) do (
	FOR /F "usebackq" %%F IN (`ffprobe -v error -select_streams v:0 -show_entries stream^=codec_name -of default^=noprint_wrappers^=1:nokey^=1 "%%a"`) DO (
		if "%%F"=="vp8" (
			ffmpeg -hide_banner -c:v libvpx -i "%%a" -pix_fmt yuva420p -c:v libvpx-vp9 -crf 0 -b:v 0 -lossless 1 -row-mt 1 -tile-columns 6 -tile-rows 2 -frame-parallel 1 -c:a libopus -b:a 96k "%%~dpna_VP9.webm"
		) else (
			if "%%F"=="vp9" (
				ffmpeg -hide_banner -c:v libvpx-vp9 -i "%%a" -pix_fmt yuva420p -c:v libvpx-vp9 -crf 0 -b:v 0 -lossless 1 -row-mt 1 -tile-columns 6 -tile-rows 2 -frame-parallel 1 -c:a libopus -b:a 96k "%%~dpna_VP9.webm"
			) else (
				ffmpeg -hide_banner -i "%%a" -pix_fmt yuva420p -c:v libvpx-vp9 -crf 0 -b:v 0 -lossless 1 -row-mt 1 -tile-columns 6 -tile-rows 2 -frame-parallel 1 -c:a libopus -b:a 96k "%%~dpna_VP9.webm"
			)
		)
	)
)

for %%a in (*.mp4 *.mov *.avi) do (
	ffmpeg -hide_banner -i "%%a" -pix_fmt yuva420p -c:v libvpx-vp9 -crf 0 -b:v 0 -lossless 1 -row-mt 1 -tile-columns 6 -tile-rows 2 -frame-parallel 1 -c:a libopus -b:a 96k "%%~dpna_VP9.webm"
)

media_to_vp9.ps1

$loc = $args[0]
If ($args.length -eq 0) {
	"Defaulting to current directory of `"$(Get-Location)`"" | Tee-Object -Append -filepath "$(Get-Location)\media_to_vp9.log"
} ElseIf ( $(Try { Test-Path $args[0].trim() } Catch { $false }) ) {
	"Path `"$loc`" was found." | Tee-Object -Append -filepath "$(Get-Location)\media_to_vp9.log"
} Else {
	"Path `"$loc`" was not found." | Tee-Object -Append -filepath "$(Get-Location)\media_to_vp9.log"
	exit
}

@(Get-ChildItem -Path $loc -File -Filter *.webm).foreach({
	If ($_ -notmatch "_VP9.webm") {
		"Working on file `"$_`"" | Tee-Object -Append -filepath "$(Get-Location)\media_to_vp9.log"
		$pat = Split-Path ($_).FullName
		$codec = ffprobe -v error -select_streams v:0 -show_entries stream=codec_name -of default=noprint_wrappers=1:nokey=1 "$_"
		$new = "$pat\$(($_).BaseName)_VP9.webm"
		If ($codec -eq "vp8") {
			ffmpeg -hide_banner -hwaccel auto -c:v libvpx -i "$(($_).FullName)" -pix_fmt yuva420p -c:v libvpx-vp9 -crf 0 -b:v 0 -lossless 1 -row-mt 1 -tile-columns 6 -tile-rows 2 -frame-parallel 1 -c:a libopus -b:a 96k -y "$new"
			"Finished file `"$_`"" | Tee-Object -Append -filepath "$(Get-Location)\media_to_vp9.log"
		} ElseIF ($codec -eq "vp9") {
			# ffmpeg -hide_banner -hwaccel auto -c:v libvpx-vp9 -i "$(($_).FullName)" -pix_fmt yuva420p -c:v libvpx-vp9 -crf 0 -b:v 0 -lossless 1 -row-mt 1 -tile-columns 6 -tile-rows 2 -frame-parallel 1 -c:a libopus -b:a 96k -y "$new"
			"File `"$_`" is already in VP( WEBM) format - skipping..." | Out-File -append -noClobber -encoding UTF8 -filepath "$(Get-Location)\media_to_vp9.log"
		} Else {
			ffmpeg -hide_banner -hwaccel auto -i "$(($_).FullName)" -pix_fmt yuva420p -c:v libvpx-vp9 -crf 0 -b:v 0 -lossless 1 -row-mt 1 -tile-columns 6 -tile-rows 2 -frame-parallel 1 -c:a libopus -b:a 96k -y "$new"
			"Finished file `"$_`"" | Tee-Object -Append -filepath "$(Get-Location)\media_to_vp9.log"
		}
	}
})

@(Get-ChildItem -Path $loc -File -Filter *.mov).foreach({
	"Working on file `"$_`"" | Tee-Object -Append -filepath "$(Get-Location)\media_to_vp9.log"
	$pat = Split-Path ($_).FullName
	$new = "$pat\$(($_).BaseName)_VP9.webm"
	ffmpeg -hide_banner -hwaccel auto -i "$(($_).FullName)" -pix_fmt yuva420p -c:v libvpx-vp9 -crf 0 -b:v 0 -lossless 1 -row-mt 1 -tile-columns 6 -tile-rows 2 -frame-parallel 1 -c:a libopus -b:a 96k -y "$new"
	"Finished file `"$_`"" | Tee-Object -Append -filepath "$(Get-Location)\media_to_vp9.log"
})

@(Get-ChildItem -Path $loc -File -Filter *.mp4).foreach({
	"Working on file `"$_`"" | Tee-Object -Append -filepath "$(Get-Location)\media_to_vp9.log"
	$pat = Split-Path ($_).FullName
	$new = "$pat\$(($_).BaseName)_VP9.webm"
	ffmpeg -hide_banner -hwaccel auto -i "$(($_).FullName)" -pix_fmt yuva420p -c:v libvpx-vp9 -crf 0 -b:v 0 -lossless 1 -row-mt 1 -tile-columns 6 -tile-rows 2 -frame-parallel 1 -c:a libopus -b:a 96k -y "$new"
	"Finished file `"$_`"" | Tee-Object -Append -filepath "$(Get-Location)\media_to_vp9.log"
})

@(Get-ChildItem -Path $loc -File -Filter *.mkv).foreach({
	"Working on file `"$_`"" | Tee-Object -Append -filepath "$(Get-Location)\media_to_vp9.log"
	$pat = Split-Path ($_).FullName
    $codec = ffprobe -v error -select_streams v:0 -show_entries stream=codec_name -of default=noprint_wrappers=1:nokey=1 "$_"
	$new = "$pat\$(($_).BaseName)_VP9.webm"
	If ($codec -eq "vp8") {
		ffmpeg -hide_banner -hwaccel auto -c:v libvpx -i "$(($_).FullName)" -pix_fmt yuva420p -c:v libvpx-vp9 -crf 0 -b:v 0 -lossless 1 -row-mt 1 -tile-columns 6 -tile-rows 2 -frame-parallel 1 -c:a libopus -b:a 96k -y "$new"
	} ElseIF ($codec -eq "vp9") {
		ffmpeg -hide_banner -hwaccel auto -c:v libvpx-vp9 -i "$(($_).FullName)" -pix_fmt yuva420p -c:v libvpx-vp9 -crf 0 -b:v 0 -lossless 1 -row-mt 1 -tile-columns 6 -tile-rows 2 -frame-parallel 1 -c:a libopus -b:a 96k -y "$new"
	} Else {
		ffmpeg -hide_banner -hwaccel auto -i "$(($_).FullName)" -pix_fmt yuva420p -c:v libvpx-vp9 -crf 0 -b:v 0 -lossless 1 -row-mt 1 -tile-columns 6 -tile-rows 2 -frame-parallel 1 -c:a libopus -b:a 96k -y "$new"
	}
	"Finished file `"$_`"" | Tee-Object -Append -filepath "$(Get-Location)\media_to_vp9.log"
})

@(Get-ChildItem -Path $loc -File -Filter *.avi).foreach({
	"Working on file `"$_`"" | Tee-Object -Append -filepath "$(Get-Location)\media_to_vp9.log"
	$pat = Split-Path ($_).FullName
	$new = "$pat\$(($_).BaseName)_VP9.webm"
	ffmpeg -hide_banner -hwaccel auto -i "$(($_).FullName)" -pix_fmt yuva420p -c:v libvpx-vp9 -crf 0 -b:v 0 -lossless 1 -row-mt 1 -tile-columns 6 -tile-rows 2 -frame-parallel 1 -c:a libopus -b:a 96k -y "$new"
	"Finished file `"$_`"" | Tee-Object -Append -filepath "$(Get-Location)\media_to_vp9.log"
})