FOSSwire

Gnac is a simple program for GNOME that allows you to convert audio files from one format to another.

It is built atop of the Gstreamer media framework, meaning that you can import any files that Gstreamer is capable of playing and then output to Gnac's supported formats for the conversion.

Once you've installed the program, it appears under the Sound & Video category, where you can launch it.

The interface is extremely simple. Use the Add button, or drag in a set of input files that you want to convert. Then select the output format from the list box at the bottom. Once you've done that, press the Convert button.

The default export options allow you to convert to Ogg/Theora and FLAC as well as WAV and Speex. While the number of export formats built in by default is nowhere near as high as with some programs, particularly those based upon ffmpeg, keeping just a few formats does keep the application simple.

For those people familiar with Gstreamer, it is possible to add to that list and add a new 'audio profile' with custom settings, so you are not strictly limited to those audio export formats.

Despite that limitation, Gnac is an effortlessly simple program with a great interface and could come in extremely handy if you're trying to batch convert a music collection to FLAC or Theora, for example.

The ability to drag a whole load of files in, choose the format and click Convert and then just leave it doing its work makes it perfect for batch jobs.

Gnac 0.1.1 has recently been released, packages for your distribution along with source code to build yourself can be downloaded from here.

KDE users, here's a neat application that creates a 'service' in your file manager that allows you to easily convert videos to other formats using ffmpeg.

ffmpegmenu is what you need. After copying the simple script into the right directory, an action will appear in the sidebar of either Konqueror or Dolphin (your choice), which easily allows you to convert selected video to DVD, MPEG or into iPod format with a couple of clicks.

The script itself is very simple, such that it's definitely possible to edit it to customise the commands it runs to make your own ffmpeg conversion options. It does require you have ffmpeg and the necessary codecs to convert to DVD, MPEG and iPod already installed, as it is just a loader which calls ffmpeg. But enough of that, how do you actually install the script?

Well, first of all, download it from KDE-Apps, direct download link here.

When that file opens, save it as ffmpegmenu.desktop and put it on your desktop. All we now need to do is to copy the file into place.

You'll probably need to be root to do this, so run su - first (or Ubuntu users, prefix the cp command below with sudo).

# cd /home/yourusername/Desktop
# cp ffmpegmenu.desktop /usr/share/apps/konqueror/servicemenus
# cp ffmpegmenu.desktop /usr/share/apps/d3lphin/servicemenus

Feel free to omit either the Konqueror or Dolphin command depending on whether you want this installed in one, the other, or both. Once installed, highlighting a .avi file should show the following in the sidebar (this screenshot from Dolphin):

And it's done!

If you want to uninstall, simply remove the ffmpegmenu.desktop files as root, like so:

# rm /usr/share/apps/konqueror/servicemenus
# rm /usr/share/apps/d3lphin/servicemenus