[aur-general] Reffering to a Package Version in PKGBUILD

I've got a problem with xine-lib crying for ffmpeg>=20080715. I have ffmpeg-svn installed and this fullfilled the requirement. But even if I write something like presents=('ffmpeg' 'ffmpeg>=20081031') into my PKGBUILD the error occure again and again. A dynamic Date as mentioned in the comments of ffmpeg-svn (something like date +%Y%m%d would be nice). Thank you Raubkopierer