How to Convert Images to WebP Format in Linux & HEIF format

[labbe5]

https://www.tecmint.com/convert-images- ... -in-linux/

One of the numerous best practices you will hear of, for optimizing your web-site performance is using compressed images. In this article, we will share with you a new image format called webp for creating compressed and quality images for the web.

WebP is a relatively new, open source image format that offers exceptional lossless and lossy compression for images on the web, designed by Google. To use it, you need to download pre-compiled utilities for Linux, Windows and Mac OS X.

First, look for webp in standard repositories (apt install webp...) or in PPM.

Use this command if webp is not in standard repositories : $ wget -c https://storage.googleapis.com/download ... -32.tar.gz

And follow instructions, clicking the link above.

Further reading about HEIF format (High Efficiency Image Format) :
https://www.gimp.org/news/2018/05/20/gi ... -released/
https://news.ycombinator.com/item?id=17125728

[musher0]

Hello labbe5.

Thanks for the reminder.

A few weeks ago, I compiled Google's webp lib and utilities for 32-bit xenialPup-7 /
StretchPup-7, here.

MochiMoppei also did some work on this picture format. Please see here.

IHTH

[MochiMoppel]

I use the (somewhat older) precompiled libwebp-0.4.1-linux-x86-32 from Google's https://storage.googleapis.com/download ... index.html

WebP is a good choice for document archiving as is produces very small files. Much better than JPG.
Tools used for screenshot:
PNG => JPG: mtpaint "Save As JPEG" quallity 0
PNG => WebP: cwebp -q 0 file.png -o file.webp

[musher0]

With all due respect, MochiMoppei,

why would a user wish to save a picture with a quality ratio of zero (0)?

Or perhaps you are using this 0 quality picture only as a comparative argument?

In other words, you are saying that for the same picture, from a png format in "100"
quality to a webp format at "0" quality, there is a space savings of 90 %.

If I may, the reduction in quality is ok for some drawings and some text-as-picture,
but not if one values the artistic value of a photograph. (Please see attached.)

TIA.

[greengeek]

In this instance - isn't file size the important determinant rather than image % quality?

I am keen to compare this new webp format. Is it proprietary or freely useable??

[MochiMoppel]

In this instance - isn't file size the important determinant rather than image % quality?

Yes

Is it proprietary

No

or freely useable??

Yes