Recently, I have downloaded a very high quality video (1920 x 1080 pixel, codec-H.264/AVC,24FPS, audio codec-MPEG-4 AAC audio). My desktop computer is equipped with AMD Athlon 3000+ processor, Nvidia GEForce 400 series graphic card with 256MB. Currently, I’m using Ubuntu Karmic Koala version. I couldn’t play the video using vlc player. Please help!