• AnAustralianPhotographer@lemmy.world
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    9 months ago

    Ive downloaded imagemagick and used the convert program to make them smaller.

    convert -quality 85 input.jpg output.jpg

    should make it smaller, the 85 is a % factor which determines how much compression the algorithm uses. 100% is big files with high quality, the default is something like 92% .

    convert -resize 1920x1080 -quality 85 input.jpg output.jpg

    also adjusts the resulting image size.

    For the image i used, it was 3840*2160 and 3.0 meg. When compressing with 50% quality, the file size was 850kb, when resizing down, it was 250kb,

    How much each file size shrinks with % compression will likely depend on what the image is.