Why doesn't my Imagemagick convert consider the loop parameter? -

i'm using command:

convert -delay 10 -loop 1 -density 300 myfile.pdf myfile.gif 

on windows 10 , works except loop parameter: if set 1, infinite loop.

what doing wrong?

i did experiments varying -loop parameter 0 through 3 , using simple red frame followed blue frame follows:

for in 0 1 2 3;     echo i=$i    ((d=80+i))    convert -delay $d -loop $i -size 256x256 xc:red xc:blue a.gif    identify -verbose a.gif | grep -e "iter|delay" done 

results

i=0   delay: 80x100   iterations: 0   delay: 80x100   iterations: 0 i=1   delay: 81x100   delay: 81x100 i=2   delay: 82x100   iterations: 2   delay: 82x100   iterations: 2 i=3   delay: 83x100   iterations: 3   delay: 83x100   iterations: 3 

so, seems -delay parameter , -loop parameter are correctly set in gif file, although -loop omitted if 1 default anyway.

i looked @ animated gif in osx using quicklook feature tap ␣ (spacebar) in finder , not respect -loop setting, however, if open gif in safari or firefox respect setting, guessing not standardised , whatever using view gif files not compliant poorly-followed standard.

i may wrong try using different viewer such firefox or chrome.