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Where do I get the MPEG-4 AAC decoder, and the H.264 decoder.

How to install them and play the multimedia?

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Have you tried sudo apt-get install ubuntu-restricted-extras? –  Peachy Nov 8 '12 at 3:55
@Peachy why don't you add that as an answer? –  devav2 Nov 8 '12 at 4:07

2 Answers 2

ubuntu-restricted-extras package allows users to install ability to play popular non-free media formats, including DVD, MP3, Quicktime, and Windows Media formats.

To install ubuntu-restricted-extras package:

  1. Open a terminal by pressing Ctrl+Alt+T.

  2. Run this command:

    sudo apt-get install ubuntu-restricted-extras
  3. Alternatively, you can install the package via Software Center by launching it via Dash and searching the package and clicking on Install.

    enter image description here

Also, try installing libavcodec-extra-53, libavcodec53 and ffmpeg with this command:

sudo apt-get install libavcodec-extra-53 libavcodec53 ffmpeg
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Support to decode MPEG-4 AAC is provided by gstreamer1.0-libav and to decode H.264 there is gstreamr0.10-ffmpeg:

$ sudo apt-get install gstreamer1.0-libav gstreamer0.10-ffmpeg

For more information have a look at the Ubuntu Documentation.

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protected by Community Dec 27 '13 at 14:42

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