i cannot watch the mp4 file
 

i have install fedora 14...since i am beginner to linux environment ...
i cannot open a mp4 file through Movie player ......it show a error ...with a dialog box " Movie player require additional plugin to decode this file,
the following plugin require: MPEG-4 AAC decoder,H.264 decoder"......although after click on search button i won't get the soluton.....plz help me..........