i recently downloaded a couple videos from a torrent, and a couple of them don't work right. when i play it at first there's no audio but the video plays. when i fast forward or backtrack the video the audio start working until the end, all the audio was in sync with with the video. then when i restart the video from the beginning the audio isnt working anymore. i tried gspot because i thought maybe the audio was out of sync. i tried using several different players, (windows media player, winamp, bsplayer, realtime player, and quicktime player), same problem. should i convert? i am currently using an avi file format.