How can I export a krita (kra) document with many layers to a png using command line?
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I have no experience with krita, and don't know what a kra document is, but if you intend to convert to a png format and have many layers, you'll have to flatten the image first as png doesn't support layers. This is how I would handle a multi-layer image in Gimp. I don't believe you can do this from the command line with the document in its current state.– Elder GeekApr 22, 2015 at 13:49
2 Answers
There is Calligra Converter:
sudo apt-get install calligra-libs
run with
calligraconverter input_file output_file
or you could try this solution:
Artscript in Files/Nautilus
Artscript is a software to convert/watermark/glue-together on the fly a big range of images format. Even SVG, *.kra and *.ora.
Download and unzip Artscriptk source code in a folder. Get the last here
- Then with Files go to
/home/<yourusername>/.local/share/nautilus/scripts
- Create a file Artscriptk
touch Artscriptk
give it execution permissions
sudo chmod +x Artscriptk
and edit it:
gedit Artscriptk
paste this inside, and customise the path depending where you unzipped Artscriptk sources:
#!/bin/sh /home/<yourusernamehere>/path/to/artscriptk/artscript2.tcl $NAUTILUS_SCRIPT_SELECTED_FILE_PATHS
Now you can select files in Files/Nautilus, and do right click→script→Artscript and send the files to Artscript for using it.
I tried this on Linux subsystem for Windows (WSL), but for some reason it doesn't work. I figured out a quick little workaround though.
.kra files are really just archives, and they actually have 2 png versions of your image inside: mergedimage.png
and preview.png
. So you can just use 7z or another archiving tool to extract the mergedimage.png
.
so in one command that would be:
7z x my_image.kra -o. *.png
or
7z x my_image.kra -o. mergedimage.png
if you only want the latter.
the -o.
flag sets the output directory to the current directory, you might want to play around with that.