Convert emf to png with saving transparency

Yuuya · December 8, 2025, 5:01am

title

I am using command line to convert emf to png files, but since emf file does not have a background by default, when converting, libreoffice generates a huge white space behind the actual image. Libreoffice does have a save transparency option in the settings

but i dont see any CLI reference for this option at Graphics Export Parameters
The closest one is translucent and ExportOnlyBackground, but toggling these two parameters to true or false didn’t make any difference.

My cmd:

soffice --headless --convert-to ‘png:writer_png_Export:{“ExportOnlyBackground”: {“type”: “boolean”, “value”: “true”}, “Translucent”: {“type”: “boolean”, “value”: “true”}}’ i1.emf

any idea where went wrong?

Wanderer · December 8, 2025, 6:51am

No, but I will change your tags. It seems neither Base for Database-Module nor basic for the Macro-Language BASIC fits…
.
As you seem to use LibreOffice as a graphics converter here I’m out. I would probably tried ImageMagick or Ghostscript, not an office-suite.