install ubuntu-restricted-extras

 $  sudo apt-get install ubuntu-restricted-extras[sudo] password for dhwan: Reading package lists... DoneBuilding dependency tree... DoneReading state information... DoneThe following additional packages will be installed:  cabextract chromium-codecs-ffmpeg-extra gstreamer1.0-libav  gstreamer1.0-plugins-ugly gstreamer1.0-vaapi libavcodec-extra  libavcodec-extra58 libgstreamer-plugins-bad1.0-0...