When executed from command line, invoking directly GraphicsMagick, the following instructions split correctly a big tiff multipage image in several single image files. Now I need to find the right translation to make it work with the Node.js gm module ( http://aheckmann.github.com/gm/):
gm convert +adjoin -trim input.pdf PNG8:output%03d.png
Any help would be really appreciated.
You can use custom arguments directly from nodejs.
Example:
var gm = require('gm');
gm().command('convert').in('+adjoin').in(filePath).write('image%02d.jpeg', function(err) {
// something
});