Gloobus Preview is an extension to the GNOME desktop to allow for quick preview of selected files. It is inspired by Apple’s Quickview. Gloobus Preview allows you to get a quick preview of more than 40 different file types which includes audio, video, image, documents etc.
A cool thing with Gloobus Preview is that when you are previewing an audio or a video file, you can drag the slider of the progress bar like in other players.
Gloobus Preview is currently available for Ubuntu 9.10, 10.04 and 10.10. So, if you want to install Gloobus Preview, open the terminal and execute the following commands:
sudo add-apt-repository ppa:gloobus-dev/gloobus-preview
sudo apt-get update
sudo apt-get install gloobus-preview
sudo apt-get upgrade
If you are using Nautilus Elementary, to use Gloobus Preview, simply select the file you wish to preview and press Space. Press Space again to close the preview.
If you do not use Nautilus Elementary, you have to select the file and then press CTRL+C and CTRL+Space.