[Gnash-dev] could anyone help me with this error?

[zhonghua zhu]

i got this error when i was compiling gnash-0.8.9

        ERROR: You have version  of FFmpeg installed,
               with swscale enabled.
               This setup isn't supported!
               Version 51.11.0 or newer is required, enabling swscale if >= 52.0
.0.
               You can install libswscale from http://ffmpeg.org
               or .deb users: apt-get install libswscale-dev

so i googled it for a long time and and scratched some patch onto ffmepg.m4 file

still.......

i am using mingw