ImageMagick GIF to WebP

[Erik_S]

Hi, I’m trying to convert a GIF to an animated WebP.

• (tested in both Kirby 4.5 with PHP 8.3 and Kirby 5 beta with PHP 8.4)
• ImageMagick Version 7.1.1.46 is installed and working
• thumbs driver in kirby config is set to ‘im’ (since GD doesn’t support GIF to animated WebP)
• custom bin location in kirby config is set correctly
• converting images works generally
• converting a GIF to an animated WebP technically works using $file->thumb(['format' => 'webp'])

but…

there are two issues:

1. When using $file->thumb(['format' => 'webp']), the light-gray background in one of my test GIFs gets removed. This doesn’t happen with another GIF which has a dark background.
2. In addition, the frames are cropped in a way that the remaining content fits exactly the image frame. This behavior only starts to appear in the second GIF with the dark background, when I add quality, width or height to the thumb method.

I know my descriptions sounds a bit weird. If there is something I need to clarify, I’ll do my best.

Many thanks in advance!

[distantnative]

Have you tried to convert the GIF via the command line with imagick? To find out if it’s something about the way Kirby is using im or whether it’s a bug of imagick.