No sound in videos on pc

[generic.imitation]

I have all the players, codec packs and software on my computer, and have used all 3 video encoding settings on my touch pro, but I get no sound when i put the video on my pc. Any suggestions?

VLC Player, GOM Player, Media Player Classic, SUPER.

It plays the video in each of these programs, but never any sound. I also try to open it up in media player and media player classic and it crashes.

edit: well while typing this i just changed the extensions to 3gp and they work. for future reference if anyone has this problem just do that