lepton VS compressonator

JPEG XL can losslessy transcode JPEG into a smaller format. JPEG2000 (or WebP or anything but Lepton[0]) didn't offer that. Besides, we have gif and png for approximately the same space. gif still isn't gone. Displacement isn't necessary for a new format to become useful.

[0] https://github.com/dropbox/lepton

We also use https://github.com/dropbox/lepton to save disk storage. It give 20% saving in our experience.

It may not be directly related to your question, but Dropbox has developed a great open source software called Lepton. It is able to compress JPEGs losslessly and saves on average about 22% of storage space. The files are not readable after compression without decompression, but since your focus seems to be on archiving anyway, it might be handy. And for larger collections of high-resolution images, it can actually save a decent amount of storage space.

Just wondering, is there a "lossless" conversion from PNG/JPEG/etc to AVIF? Kinda like Lepton[1] but just re-compressing without further loss of details.

[1] https://github.com/dropbox/lepton

AMD’s Compressonator utility (https://github.com/GPUOpen-Tools/compressonator) is free and can provide much better image compression. It provides settings for adjusting the desired compression quality (better compression = slower). It can run either on CPU or GPU, though GPU will be faster, especially for BC7 compression. It works with my Nvidia card, so you don’t necessarily need an AMD card to use the utility, but YMMV depending on the GPU you’re trying to use.

If the answer involves texture formats for some odd reason compressonator is a tool worth looking into, its kind of incomprehensible, but check the releases page anyways, I think you want the GUI one

Hey, thanks for the answer, I went to try loading up some textures that I compressed with BC4 and BC5, using Compressonator from here: https://github.com/GPUOpen-Tools/compressonator

DynDOLOD will run but will not be able to compress any of its textures. You will need an external tool for that. ROCm's compressonator seems to work just fine for BC7, just need a bit of fiddling

In the first topic it also mentions saving your edited dds files with conpressenator to achieve better quality, I don’t remember where I got that program but here is one link to it, I think I got the earliest release on that page.