I use Proshow Gold to create high quality slideshows. Fitting only two hours of video on a DVD is no problem and don't really want more. I author the DVD with Tmpgenc DVD Author. At the final stage where it creates the video and audio folders, it says the whole 4.7gb of the DVD is full, then when I burn it, the DVD is only half full. Did it change the quality of the video or only the audio (PCM>MP2)? How can I be sure about the bitrate after creating the two folders? Why doesn't Author take into account the audio compression?