Most current video multimedia players play many video formats, including the Flash video .flv format.
MPlayer Multimedia Player
Mplayer is a video player with a wide range of formats supported (including RealMedia and Windows-codecs) and a wide variety of outputs.
sudo apt-get install mplayer
SMPlayer
SMPlayer is an enhanced frontend for MPlayer.
sudo apt-get install smplayer
Dump a video stream to disc
You can dump a video stream to disc using Mplayer:
mplayer -dumpstream streamurl
VLC Multimedia Player
VLC is a cross-platform multimedia player that supports many formats without need for additional codecs. It can not only receive video streams (also see here to convert it to mp4), but can act as a server for video streams, as well. It is one of the only players that can view and backup almost any DVD format, no matter which copy protection is used. See these tips for using VLC to backup/rip encrypted DVDs.
sudo apt-get install vlc vlc-plugin-pulse
VLC plugins
There are many VLC plugins. You will likely only need to install a few of them, however, depending on your hardware and input/output configuration:
sudo apt-get install vlc-plugin-ggi vlc-plugin-jack vlc-plugin-pulse vlc-plugin-sdl vlc-plugin-svgalib mozilla-plugin-vlc vlc-plugin-esd
Xine-UI Multimedia Player
Xine UI is a multimedia player based, of course, on the xine platform. It can also play streamed video from the Internet and supports most formats, including some uncommon ones.
sudo apt-get install xine-ui
Kaffeine Video Player
Kaffeine is the default video player in Kubuntu. Install:
sudo apt-get install kaffeine
RealPlayer 11 Multimedia Player
The Linux Realplayer is actually based on the open-source Helix player. These instructions are to install the proprietary version of RealPlayer only.
Download Real Player official linux player
Open a terminal and cd to the directory you have downloaded realplayer’s .bin file. Then issue the following commands
chmod +x RealPlayer11GOLD.bin
sudo ./RealPlayer11GOLD.bin
When it asks for installation path enter /usr/local/RealPlayer
For all other questions just choose default by pressing enter.
If you have installed mozilla-mplayer package you will need to delete the mplayer firefox plugin for real player videos. Other wise all real player files will open with mplayer. For that please do this
cd /usr/lib/firefox/plugins
sudo rm mplayerplug-in-rm.*
Please remember to restart firefox and when ever you click on a real player video choose the option open with and use /usr/bin/realplay