Install Mplayer and Multimedia Codecs (libdvdcss2,w32codecs,w64codecs) on ubuntu

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　　MPlayer is a movie and animation player that supports a wide range of  codecs and file formats, including MPEG 1/2/4,DivX 3/4/5, Windows Media  7/8/9, RealAudio/Video up to 9, Quicktime 5/6, and Vivo 1/2. It has many  MX/SSE (2)/3Dnow(Ex) optimized native audio and video codecs, but  allows using XAnim’s and RealPlayer’s binary codec plugins, and Win32  codec DLLs. It has basic VCD/DVD playback functionality, including DVD  subtitles, but supports many text- based subtitle formats too. For video  output, nearly every existing interface is supported. It’s also able to  convert any supported files to raw/divx/mpeg4 AVI (pcm/mp3 audio), and  even video grabbing from V4L devices.
　　Install Mplayer in Ubuntu 11.10 (Oneiric)
　　You have to make sure you have enabled universe,multiverse repositories
　　Now you need to run the following command to update the source list

　　sudo apt-get update

　　Install mplayer using the following command

　　sudo apt-get install mplayer

　　or Click on the following link

　　apt://mplayer

　　Install w32 video codecs and libdvdcss2 in Ubuntu 11.10
　　Support for WMV, RealMedia and other formats has been bundled into  the w32codecs package. This package is not available from the Ubuntu  repositories due to licensing and legal restrictions.To play encrypted  DVDs, the libdvdcss2 package is essential.
　　The following command adds Medibuntu’s repository to Ubuntu. It also  adds Medibuntu’s GPG key to your keyring, which is needed to  authenticate the Medibuntu packages.

　　sudo wget  http://www.medibuntu.org/sources.list.d/$(lsb_release -cs).list  --output-document=/etc/apt/sources.list.d/medibuntu.list

　　sudo apt-get -q update

　　sudo apt-get --yes -q --allow-unauthenticated install medibuntu-keyring

　　sudo apt-get -q update

　　You may also wish to add the following packages. The first will cause  many apps from the Medibuntu repository to appear in Ubuntu Software  Center (Ubuntu 9.10+) or Add/Remove Applications (versions prior to  9.10). The second will allow users to generate crash reports against  Medibuntu packages and submit them to the Medibuntu bugtracker.

　　sudo apt-get --yes install app-install-data-medibuntu apport-hooks-medibuntu

　　Please note you may have to use --force-yes instead of --yes in order for this command to succeed.
　　Fori386 Users install Codecs using the following command

　　sudo apt-get install w32codecs libdvdcss2

　　For amd64 Users install Codecs using the following command

　　sudo apt-get install w64codecs libdvdcss2

　　Using above download locations you can install most of the mutimedia codecs for ubuntu.
　　Mplayer Plugin for Firefox
　　If you want to install Mplayer with plug-in for Mozilla Firefox run the following command

　　sudo apt-get install mozilla-mplayer

　　or click on the following link

　　apt://mozilla-mplayer