720 x 480i/29.94
NTSC is a method of combining a pair of colouring signals and a luminance signal into one composite signal. Only used in analog TV. DVDs and Blu-ray discs do not record colour in this way. The disc recordings keep luminance and the pair of colouring signals all separate from each one.
Digital TV and discs have SD signals of 720 pixel/line x 480 lines interlaced at a frame rate of 29.97 frame/s. A disc will contain 25 % more program duration if it is recorded at 23.97 frame/s. Either MPEG-2 or the more efficient MPEG-4 compression can be used.
This system is used in the Americas and parts of Asia.

720 x 576i/25
PAL is a better method of combining a pair of colouring signals and a luminance signal into one composite signal. Only used in analog TV. DVDs and Blu-ray discs do not record colour in this way. The disc recordings keep luminance and the pair of colouring signals all separate from each one.
Digital TV and discs have SD signals of 720 pixel/line x 576 lines interlaced at a frame rate of 25.0 frame/s. A disc will contain 4 % more program duration if it is recorded at 24 frame/s. Either MPEG-2 or the more efficient MPEG-4 compression can be used. It is used everywhere else.

I tried to burn a signal from an 720x576i/25 mpeg2.ts file using the burner program, but as quoted above it is not available using MPEG-4. As an option I tried using the Produce program. This should have reduced the file size by 30 - 50 % this is not what happened. The file size was unchanged. I only wanted to change the compression from MPEG-2 to MPEG-4 and produce a .mp4 file on a DVD.

Any comments on the last paragraph?

AlanH
Upgrade to PowerDirector 9 Ultra64 from V7/8 Retail version CCD:3398748 4/01/2011