Black screen for ps3 with audio

hi
i got my ps3 a few months ago ever since i have ben trying to put full movies on it.ive been using mp4(h264 + aac) default ps3 profile for it and after putting it on my ps3 all that comes up is a black screen but i can hear the audio.im sorry if this has been asked before but i cant search ps3 since it is too short a word.any help will be greatly appreciated.

James

If you view the files on your PC do they play correctly? How are you getting the files to the PS3, as an actual file or are you streaming from Windows Media Player or another DLNA server?

getting the file through a flash drive and they play fine on windows media player.