A new version of Sozi-export has been published on NPM as a fix to issue #22.
Sozi-export 19.09.14 adds a new option
--png-compression to set the desired compression level when generating PNG images.
Some tests show that setting the highest compression level can divide the generated file size by 100.
While this option is mainly useful when exporting to a sequence of images, it will also affect the intermediate PNG files created when exporting to other formats.
As observed by some users, in previous versions of Sozi-export, the height of the created image files and videos was different from the height specified on the command line. This new version fixes this issue.
Please note that Sozi-export is based on obsolete software that may not work on your platform. Read this conversation for more information.