oh, it't my fault.
i upload here
release the pdftojpg program
install:
cp pdftojpg.rar to "C:\Program Files\" and unrar it
execute:
double click C:\Program Files\pdftojpg\bin\test.bat
argument description：
Usage: pdftojpg [options] <PDF-file>
-h : help
-r <int> : rotate 90 or no rotate, default 1
-em <int> : use embedded in font or not,default 0
-fp <int> : PDF first page，default １
-lp <int> : PDF last page, default max page
-sw <int> : screen width ,default 800 ,
-sh <int> : screen heigth ,default 600
be careful:
you should use -em 1 default. there are bugs in don't use embedded fonts.