The testing was performed with the help of the cmdtools, using the following command line:

agen -v "a=[2,5,10]" -v "b=[1,2,3,4]" "$(a)" "$(b)" | axargs -i 2 -a MTImageResize.exe retro_segfault.jpg -m $(FILE1) -j $(FILE2) retro_big.jpg

Resulting the data: