mp4 the audio or video format? Some audio files have the mp4 file extension. Apple uses .m4a for mp4 audio format so it's easy to know the difference.

This codec pack looks very good K-Lite Codec Pack 4.7.0 FULL / STANDARD/ BASIC : K-Lite Codec Pack is a collection of codecs and related tools (includes video & audio codecs.)

Or this one FFDShow MPEG-4 Video Decoder 2009-03-01

However, not good to mix brands of codecs. Best to keep to one brand. ;) Otherwise clashes can occur. That happened to me, one codec pack refused to run at all, Windows XP system said it was not even on my system. lol :D

MP4 video, I've tried k-lite codec and they don't seem to load or else they just don't do anything. I've got Vista.

You will probably need to remove all other codecs. ;) Add/Remove Programs control panel I believe to do that. :)

hi,every movie that i download has audio,but no video,just those special effects that play when you listen to music. also,every time i turn off my computer,it doesn't resume my downloads please help.e-mail- I broke the rules thankls

I'm sorry, but I cant resist it...here you make that post in a thread with all of your answers and then post your email addy...

trying to harvest other people's info?

Harvest?
 

what are u talking about?harvest? if you can't help, then shut the f#$%k up you dumb ****

now you're permanently banned dumb a$$