ok, just to make it clear although using MSIE (which uses Windows Media Player internally) i can jump forward, backward and so, and also if i stream with Windows media player.
if i download the file first, and then use the same player (Windows Media Player) on the local file, i can not jump forward or backward. my problem with mplayer is not jumping forward and backward but the audio. My distribution is ubuntu gutsy 64bit. 'apt-cache search codec|grep -i win' didn't yield any result also, if anyone has experiance with how to make mplayer (or vlc, xine or any other linux player) to play faster with voice without changing the pitch, please let me know. the url in question is: mms://msvideo.tau.ac.il/Courses/Exact_Sciences/Physics/Quantum_Theory_1/1.wmv thanks, erez.