Bulk Convert PNG to WEBP

bulk-convert-png-to-webp.ps1

# https://developers.google.com/speed/webp/download
Get-ChildItem -Path . -File -Depth 0 | ForEach-Object -Parallel { &'C:\Program Files\libwebp\bin\cwebp.exe' -q 75 "$_" -o "$([io.path]::GetFileNameWithoutExtension($_)).webp" } -ThrottleLimit 16

Tried to do something similar but this is much simpler. Not big in PS. Didn't realize at the time there was a ForEach-Object.

Couple notes, -q defaults to 75, no need to define it otherwise. Also, I think you could use $_.BaseName instead of $([io.path]::GetFileNameWithoutExtension($_)). But to each their own.

What I'm using based off of this.

Get-ChildItem . -Depth 0 -Include "*.jpg","*.jpeg", "*.png", "*.tif" | ForEach-Object { cwebp "$_" -o "$($_.BaseName).webp" }

Also to do all sub-folders.

Get-ChildItem . -Recurse -Include "*.jpg","*.jpeg", "*.png", "*.tif" | ForEach-Object { cwebp "$_" -o "$($_.BaseName).webp" }

Useful flags for bulk converting

-mt

• For multi-threading, if possible.

-m 0-6

• Specify the compression method to use. This parameter controls the trade off between encoding speed and the compressed file size and quality. Possible values range from 0 to 6. Default value is 4. When higher values are used, the encoder will spend more time inspecting additional encoding possibilities and decide on the quality gain. Lower value can result in faster processing time at the expense of larger file size and lower compression quality.