I downloaded stable ver. 3.0 and extracted it to a usbflash by UNETBOOTIN
1) Now in the system running in live mode when I installed mPlayer and the depending packages but when I try to play a video file it gives a "-vo error"
2) Further I tried to make an iso so that I can preserve the current install with mPlayer, But once the during iso creation i gaot an error like that.... cannot mount kernel the next time i tried it said completed but I dont know there it has saved the new iso 3) Y dont u include a video player in the default stable release .In which world you live??!
If so, I think you can specify a default in a configuration file. Google is telling me to add it in ~/.mplayer/config: vo=x11 or vo=xv or whichever works from above.