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Hello, tastytea. |
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On Fri, Sep 18, 2020 at 15:58:59 +0200, tastytea wrote: |
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> On 2020-09-18 13:32+0000 Alan Mackenzie <acm@×××.de> wrote: |
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> > I've a number of jpeg files, 17 to be precise, which are high |
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> > resolution and are around 3½ megabytes each. I would like to |
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> > compress them down to around 100 kb each. |
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> > I'm sure this is possible, if tedious, in gimp, somehow, but I can't |
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> > for the life of me work out how (since it's years since I last did |
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> > this). |
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> > What is the best way (minimal learning, scriptable if possible), to do |
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> > this? |
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> I'm not aware of a way that allows you to specify a file size, but you |
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> can use convert from media-gfx/imagemagick to re-compress and/or resize |
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> the files. For example: |
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> convert -quality 50 in.jpg out.jpg |
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> convert -resize 1000 in.jpg out.jpg |
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> The last command makes the image 1000px wide and sets the height |
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> automatically to the right value. |
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> Hope this helps, |
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Thanks, it helped enormously! Having emerged imagemagick, with |
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convert -quality 20 in.jpg out.jpg |
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in a for loop, I got the size down to around 200 kb each, without much |
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degradation in the picture quality. |
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> tastytea |
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-- |
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Alan Mackenzie (Nuremberg, Germany). |
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