Imagemagick: remove alpha component (replace all intermediate alpha pixel with solid pixel)

Question

To solve Android build issue I need to replace all intermediate alpha pixel with solid pixel (leaving transparent background as is).

How to that with ImageMagick or o

Answer 1

To remove alpha channel from all pictures in the folder (f.ex. all .png files) I use following command (in terminal on macOS):

for file in *.png; do convert $file -alpha deactivate; done

Unfortunately, none of any other solution given in this thread worked for me.