I am wrong, Gimp does indeed save a .heif file, any old problems are fixed. (although not in my linux flatpak)
So what you need is one of the clever guys to advise on the syntax.
run-mode INT32 The run mode { RUN-NONINTERACTIVE (1)}
image IMAGE Input image
drawable DRAWABLE Drawable to export
filename STRING The name ofthefile to export the image in
raw-filename STRING The name of the file to export the image in
quality INT32 Quality factor (range: 0-100. 0 = worst. 100 = best)
lossless INT32 Use lossless compression (0 = lossy 1 = lossless)
I thought I might get this working in BIMP but it comes unstuck with the filename parameters.
So what you need is one of the clever guys to advise on the syntax.
run-mode INT32 The run mode { RUN-NONINTERACTIVE (1)}
image IMAGE Input image
drawable DRAWABLE Drawable to export
filename STRING The name ofthefile to export the image in
raw-filename STRING The name of the file to export the image in
quality INT32 Quality factor (range: 0-100. 0 = worst. 100 = best)
lossless INT32 Use lossless compression (0 = lossy 1 = lossless)
I thought I might get this working in BIMP but it comes unstuck with the filename parameters.