Convert these image types to WebP (lossless) using Img2WebP:

• PNG (*.png)
• APNG (*.apng, *.png)
• JPEG 1 (*.jpeg, *.jpg, *.jpe, *.jfif, *.jif, *.jfi)
• JPEG 2000 (*.jp2, *.j2c, *.jpg2, *.jpf, *.jpx, *.j2k)
• JPEG XR (*.jxr, *.hdp, *.wdp, *.wmp)
• JPEG XL (*.jxl)
• BMP (*.bmp, *.dib, *.rle)
• TIFF (*.tiff, *.tif)
• TGA (*.tga)
• GIF (*.gif)
• AVIF (*.avif)
• HEIF (*.heic, *.heif)
• TGA (*.tga)
• DDS (*.dds)

Notes:

JPEG 1 is first losslessly converted to JPEG XL - which has the ability to do lossless JPEG 1 recompression - as an intermediate format to then losslessly convert to WebP.
Without this intermediate format, JPEG 1 would lose quality upon being converted, even if it was supposed to be lossless. JPEG 1 is a volatile format.

To use the program, you may have to right click the file and unblock it.

How to use:

1. Download the *.ps1 program here: https://github.com/Knewest/Img2WebP/releases

2. You will have to download and install all the libraries for the program to function, I list of them will be found in the code or below. You can view the code here or by using notepad.

3. You may have to right click the *.ps1 program and click the "unblock" button.
   - Otherwise, there should the a notification giving you a security warning. Read it and act accordingly. If you have UAC disabled, you may have to run the program in administrator if it gets blocked.

4. Place the *.ps1 file in the folder with the images you need converting to WebP lossless, consider the subdirectories too.

5. Right click the *.ps1 file and run it in Powershell, you will be asked if you want the outputted files to be put in a seperate folder (mimicing the folder structure too), once answered, this will begin the process.

6. Wait for the conversion to complete and enjoy.
   
   The instructions are a W.I.P.

How to setup:

1. Download and install all the libraries and binaries needed for the *.ps1 program to work:

<sub>- libwebp - https://developers.google.com/speed/webp/docs/precompiled

- FFMPEG - https://www.gyan.dev/ffmpeg/builds/

- libjxr - https://github.com/Knewest/precompiled-jxrlib-binaries/releases/tag/Release-v2019.10.9

- libjxl - https://github.com/libjxl/libjxl/releases/tag/v0.8.1

- ImageMagick - https://imagemagick.org/script/download.php
-- Note - It should be the one along the lines of ImageMagick-7.1.1-7-Q16-HDRI-x64-dll.exe.</sub>

2. Once you have downloaded and installed them all, open the code and set the directories for each library/binary respectively. The directories will be at the top of the code.

3. You may now successfully use the *.ps1 program.
   - Note - Windows may not allow you to run PowerShell scripts, so you will need to right click to unblock it and trust it upon exectuing it.

What do I have planned?

I plan to turn this into a user friendly tool that will automatically install all requirely libraries and without the need to move the Powershell script into a folder, rather it would be a simple binary exacutable with an interface.