Advanced users • scaling factor (-s) in grim, or another way to get a thumbnail?

I'm trying to get thumbnails out of grim. Essentially, the equivalent of scrot's -t, though I figure I will have to do TWO calls to grim to get both a full-sized image and a thumbnail, which I could happily get out of scrot in one...

ATM, I'm trying to see if scale factor could be used to get what I want. Through some brief glancing at the source, and some experimentation, I think that this value is a real number, with values GT 1 meaning bigger, i.e., it's not an integer or a percentage.

The manual says:

-s <factor>
Set the output image's scale factor to factor. By default, the scale factor is set to the highest of all outputs.

Choosing "1.50" gives a bigger image that's very clear; "0.90" an image that's still readable, but "0.40" or "0.50" give images that are smudgy and unreadable even though they're the desired small size. So, probably not the equivalent of a thumbnail. But, if that's not it, there seems to be no way to make a smaller image from within the product itself. Perhaps I need an external product like imagemagick?

<rant>I wish people would put more actual explanation in their man pages, instead of giving just as little as running the app with -h</rant>

Statistics: Posted by tinker2much — Mon Jan 20, 2025 12:30 am — Replies 0 — Views 12

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