How to convert a SVG to a PNG with Image Magick?
I have a SVG file which has a defined size of 16x16. When I use Image Magick's convert program to convert it into a PNG then I get a 16x16 pixel PNG which is way too small:
convert test.svg test.png
I need to specify the pixel size of the output PNG. -size parameter seems to be ignored, -scale parameter scales the PNG after it has been converted to PNG. The best result up to now I got by using the -density parameter:
convert -density 1200 test.svg test.png
But I'm not satisfied because I want to specify the output size in pixels without doing math to calculate the density value. So I want to do something like this:
convert -setTheOutputSizeOfThePng 1024x1024 test.svg test.png
So what is the magic parameter I have to use here?
I haven't been able to get good results from ImageMagick in this instance, but Inkscape does a nice job of it on Linux and Windows:
inkscape -z -e test.png -w 1024 -h 1024 test.svg
Here's the result of scaling a 16x16 SVG to a 200x200 PNG using this command:
Just for reference, my Inkscape version (on Ubuntu 12.04) is:
Inkscape 0.48.3.1 r9886 (Mar 29 2012)
and on Windows 7, it is:
Inkscape 0.48.4 r9939 (Dec 17 2012)
Try svgexport :
svgexport input.svg output.png 64x
svgexport input.svg output.png 1024:1024
svgexport is a simple cross-platform command line tool that I have made for exporting svg files to jpg and png, see here for more options. To install svgexport install npm, then run:
npm install svgexport -g
Edit: If you find an issue with the library, please submit it on GitHub, thanks!
This is not perfect but it does the job.
convert -density 1200 -resize 200x200 source.svg target.png
Basically it increases the DPI high enough (just use an educated/safe guess) that resizing is done with adequate quality. I was trying to find a proper solution to this but after a while decided this was good enough for my current need.
Note: Use 200x200! to force the given resolution
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