Although at first, it was just a player, but with the 3.5 version, they've added the support for converting multimedia files as well. As said, it is more than a player actually, because it lets you watch online TV channels by adding them directly to its GUI (in full HD) as well.
*. Plays almost any file - H.264, H.263, .avi, MPEG, AAC, MP3, WMA, WMV, .mkv, etc.
*. Converting multimedia files (included predefined presets).
*. Share videos, supports bittorrent protocol.
*. Watch/download films/TV shows with online sharing sites.
*. Play-list support.
*. Manage large albums.
*. Video thumbnail support.
*. Automatically remembers the last position of the multimedia files before closing the app.
So, if you run Ubuntu 10.04 or the 10.10 then you can easily install Miro using the Terminal. Please enter the below commands.
sudo add-apt-repository ppa:pcf/miro-releases
sudo apt-get update
sudo apt-get install miro
If you want better file type support while converting, then install the libavcodec library using the below command.
sudo apt-get install libavcodec-extra-52