Now you'll tell HandBrake to use the DVD as your source video. To do this, click the button named Source and at the bottom of the menu look for the title of the DVD you have already inserted into your computer.
In our example, we're using the DVD for the movie "Brooklyn's Finest", which is the name you see in the menu. After selecting that, HandBrake will quickly scan the disk to determine how long it is and how many chapters are in the movie.