Archives For November 30, 1999


Nautilus file browser doesn’t generate thumbnail images for WebP files, LibreOffice Documents, and animated GIFs (maybe) by default.

Thanks to atareao team, some simple extensions has been created with that Ubuntu displays thumbnail images for these file formats in Nautilus.

WebP is a image format that provides lossless and lossy compression for images on the web. It is currently developed by Google, based on technology acquired with the purchase of On2 Technologies. more…

Here are the screenshots in my Ubuntu 15.04 desktop:



GIF, WebP thumbnails


To install these extensions, go to the developer’s PPA page:

Thumbnailers for GIF, WebP, LibreOffice Docs

Scroll down and click package links and download the xxxthumbnailer_xxx.deb packages from expanded pages (Work on Ubuntu 14.04 though they’re built against 15.04).

Finally install these three .deb packages by clicking on each of them to open with Ubuntu Software Center and click the install button.

To apply changes, remove the thumbnail caches and restart Nautilus by running below commands one by one:

rm ~/.cache/thumbnails/fail/gnome-thumbnail-factory/*
rm ~/.cache/thumbnails/large/*
rm ~/.cache/thumbnails/normal/*
nautilus -q


Finally start Nautilus browser and see result.


In this tutorial I’ll show you how to download Youtube Video and convert to animated gif base on Ubuntu 12.04 Precise or 12.10 Quantal.

To download Youtube Videos:

There are quite a few ways to download Youtube videos from Ubuntu Linux. Here’re some of them:

1.) If you’re Firefox user, install Video DownloadHelper plugin. It downloads any embedded object including Youtube videos.

2.) Install the tool youtube-dl:

sudo apt-get install youtube-dl

Then download videos via command line way:

youtube-dl YouTube-video-link

3.) Install Minitube which is available in Ubuntu Software Center. From this application you can watch and download youtube videos:


To convert Youtube video to animated gif:

QGifer is a simple GUI tool for extracting part of a video to an animated GIF file. It works on Windows and Linux.


  • GIF extraction from a video file
  • Color palette editor
  • Variable color palette support
  • Dithering
  • Text rendering
  • Graphics insertion
  • Object interpolation
  • Cropping
  • Filtering
  • Looping by appending reversed copy
  • GIF optimization through ImageMagick
  • Project management
  • Translations: English, Swedish, Polish, Russian

See the video:

To install it on Ubuntu 12.10, 12.04:

1.) Install the required dependencies:

sudo apt-get install libopencv-core2.3 libopencv-highgui2.3 libopencv-imgproc2.3

2.) Run following 3 commands one by one to install the app from ppa:

sudo add-apt-repository ppa:samrog131/ppa

sudo apt-get update

sudo apt-get install qgifer