Source with subjectionably neglectable quality loss. output: zip (cbz) with no compression (copy mode).ĭepending on resampling used output files are at least 2.5 times smaller than.optional image resampling (percentage),.dozens of formats available since version 0.9 thanks to ImageMagick (including AVIF, JPEG XL, FLIF - your reader would be actual limitation and WebP might be still leading due to compatibility),.initially: conversion to WebP format with libwebp (typically 2-3 times smaller image sizes),.source: any format recognized by 7-zip (zip, rar, tar, 7z = cbz, cbr, cbt, cb7 respectively),.Script written with version 7.Helper utility for cbz/cbr files (comic books mostly) content scaling and converting to WebP (as default) format:

For this reason a recent version of PowerShell is needed. (WebP conversion only) To speed up conversion from jpg to webp the script is using the 'ForEach-Object -Parallel' method.I found libwebp.dll included in XnConvert, just a matter of copy-paste (WebP conversion only) nConvert needs libwebp.dll in it's Plugins folder (folder needs to be created).(WebP conversion only) nConvert - install folder needs to be in Windows PATH variable.

7-zip - install folder needs to be in Windows PATH variable.

Someone more PowerShell-savvy than me could probably improve this, feel free.

If you want to test this, make sure to have copies the first time if something goes bad.

In my testing I found that this script is faster than Comicrack at the conversion, it takes about two thirds of the time.

cbz file is unpacked -> any jpg converted to webp -> repacked.

Only if the user answers 'y' to convert to webp is.

At the start the user get's a question about converting to webp, and if 'y' is given as answer the script converts all.

cbr files in the current folder and converts them to. Don't use it on comics already in your library unless you understand the consequenses (possible loss of metadata).

I use this on my comics BEFORE adding them to Comicrack.

I'm not really sure that anyone will find it useful, but I've found information in this sub useful a lot and thought that i should share what little I can back. I personally convert a lot of my comics from jpg to WebP so I added that as an option as well. Recently I started learning a bit of (very basic) PowerShell and I thought it could be useful to write a simple script that converts CBR to CBZ. So I've been using Comicrack for a long time and I've been lurking on this sub for a while as well.

File converter cbr to cbz