Hello, tastytea.
On Fri, Sep 18, 2020 at 15:58:59 +0200, tastytea wrote:
> On 2020-09-18 13:32+ Alan Mackenzie wrote:
> > I've a number of jpeg files, 17 to be precise, which are high
> > resolution and are around 3½ megabytes each. I would like to
> > compress them down to around 100 kb each.
> > I'm sure this is possible, if tedious, in gimp, somehow, but I can't
> > for the life of me work out how (since it's years since I last did
> > this).
> > What is the best way (minimal learning, scriptable if possible), to do
> > this?
> I'm not aware of a way that allows you to specify a file size, but you
> can use convert from media-gfx/imagemagick to re-compress and/or resize
> the files. For example:
> convert -quality 50 in.jpg out.jpg
> convert -resize 1000 in.jpg out.jpg
> The last command makes the image 1000px wide and sets the height
> automatically to the right value.
> Hope this helps,
Thanks, it helped enormously! Having emerged imagemagick, with
convert -quality 20 in.jpg out.jpg
in a for loop, I got the size down to around 200 kb each, without much
degradation in the picture quality.
> tastytea
--
Alan Mackenzie (Nuremberg, Germany).
