This dialog allows you to setup the bitrate you would like to use for your slideshow.
The higher bitrate will result the higher quality of the video and audio.
Select "Calculate bitrate automatically to fit the slideshow on a DVD disk", and your slideshow will fit into standart 4.7GB DVD disk.
You can also setup the bitrate manually by selecting "Setup the bitrate manually" and specifying the bitrate in the "Average bitrate" and "Maximum bitrate" fields.
Select the audio bitrate from the "Audio bitrate" list.