DVDVideoSoft.com

Follow Start > All Programs > DVDVideoSoft > Free 3GP Video Converter or just click the program icon on the desktop.

The interface is very simple and self explaining. There are the field for an input file or a YouTube URL, the field for an output path, and lists with preconfigured profiles.

Click the upper Browse... button to select an input video file from your computer.

Click the bottom Browse button on the right. Choose the location where you would like to save your converted video file. Click Save.

In the list of Formats select 3GP Video, AVI Video, MP4 Video or MP3 Audio.

In the list of Profiles select one of the available pre-configured profiles.

Click the Trim video... button along the bottom of the interface to open the new window.

Use navigation line and special buttons to set start and end selection markers position.

Click Apply & Close to switch back to the main program window.

Click the Switch to a batch mode... link to convert several video files.

Then click the upper Browse... button to add other video files to convert.

Note: If you want to return to a single mode click the Switch to a single mode... link.

Click the Convert button along the bottom of the interface and wait video to be converted.