Recommendation for compressing JPG files with ImageMagick

Question

I want to compress a JPG image file with ImageMagick but can\'t get much difference in size. By default the output size is bigger than the input. I don\'t know why, but afte

Answer 1

@JavisPerez -- Is there any way to compress that image to 150kb at least? Is that possible? What ImageMagick options can I use?

See the following links where there is an option in ImageMagick to specify the desired output file size for writing to JPG files.

http://www.imagemagick.org/Usage/formats/#jpg_write http://www.imagemagick.org/script/command-line-options.php#define

-define jpeg:extent={size} As of IM v6.5.8-2 you can specify a maximum output filesize for the JPEG image. The size is specified with a suffix. For example "400kb".

convert image.jpg -define jpeg:extent=150kb result.jpg

You will lose some quality by decompressing and recompressing in addition to any loss due to lowering -quality value from the input.