Hi,

is there a way to convert a png to svg from the command line ?

selection-trace is only embedding the original png inside an svg file

thanks

Yes, there is a way to do so in the Inkscape. Surprisingly, I was also looking for the same thing a few weeks back and I found the solution after many hours of researching. You can follow the below steps:

Inkscape has got an awesome auto-tracing tool.

Install Inkscape using sudo apt-get install inkscape
Import your image
Select your image
From the menu bar, select Path > Trace Bitmap Item
Adjust the tracing parameters as needed

@alexgrey, the question was use of command-line. Please read carefully before posting.

alexgrey

Yes, there is a way to do so in the Inkscape. Surprisingly, I was also looking for the same thing a few weeks back and I found the solution after many hours of researching. You can follow the below steps: Inkscape has got an awesome auto-tracing tool. Install Inkscape using sudo apt-get install inkscape Import your image Select your image From the menu bar, select Path > Trace Bitmap Item Adjust the tracing parameters as needed

thanks for ruining any chance for this post to get one day a proper answer

as for me - so far - I use potrace to automate this process from the command line

I've tried it myself with 

inkscape --batch-process --actions="select-by-id:image1380;SelectionTrace;export-filename:traced.svg;export-do;" drawing.svg

and you are correct, it simply reformats the base64 string of the <image> but does not produce a trace.

A developer very kindly checked my findings - confirmed this is the case.

If you want to use an external tracing utility, there are a couple of ways you can do it.

1. just run potrace in the command script ( such as bash or powershell )

2. You could call either the potrace executable from a custom extension.

3. Install https://pypi.org/project/pypotrace/ and use that in a custom extensions.

It's not actually possible to pass parameters to any extensions from the command line, however if you are working your way through a list of svgs with embedded images it probably does not matter since you are probably using the same parameters each time.

I am sorry! I didn't understand what you were really looking for. Sorry, I hope to come up with a better solution next time.