Legacy ImageMagick Discussions Archive

Is this what you want to do ?
http://redux.imagemagick.org/discourse- ... =1&t=10360

Try the following, they seem to work for me.

convert \( lena.jpg -resize 100x100! -write lena100.jpg \) \
-clone 0 -delete 0--2 -resize 50x50! lena50.jpg

convert \( lena.jpg -write mpr:lena -delete 0 \) \
\( mpr:lena -resize 100x100! -write lena100.jpg +delete \) \
mpr:lena -resize 50x50! lena50.jpg


see

http://www.imagemagick.org/Usage/files/#write
http://www.imagemagick.org/Usage/files/#mpr
http://www.imagemagick.org/Usage/basics/#clone
http://www.imagemagick.org/Usage/basics/#delete

Or more specifically
Write an image multiple times....
http://imagemagick.org/Usage/files/#write