In order for the program to be prevented from converting ALL files again, the parameter --ignorenotmodified can be used.

--ignorenotmodified

Files which have not been modified are ignored at a new conversion.

Files which have been modified are converted again and preview images are generated.

Caution In this mode --overwrite should be active, in order for preview images to be enabled to be overwritten.

If only --overwrite is active, existing files are always overwritten.

If neither --overwrite nor --ignorenotmodified is active, existing files are not overwritten.

--deleteinput

Deletes the original files.

--defaultpreview3d

Default file, if the conversion fails. The file must already have the target format.

--defaultpreview

Default preview image, if the preview image cannot be created. If already the conversion of the 3D file fails, this preview image is used - if set. Otherwise the preview image is created from the default 3D file. Also here the image must have the same format as the created preview images.