The DVD-Video format uses a subset of the MPEG standards, requiring specific video image resolutions, frame rates, aspect ratios, and other parameters. The DVD Specifications require that the video contents within the same video title set to have identical parameters for the following options:

Format (MPEG-1 or MPEG-2)
Video standard for television system (NTSC or PAL)
Aspect ratio (4:3 Standard or 16:9 Widescreen)
Frame resolution (352 x 240 or 720 x 480 for NTSC; 352 x 288 or 720 x 576 for PAL)

Scenarist only accepts MPEG files which are DVD-compliant. When you create the video files, you must make sure that the encoding parameters are meant for DVD-compliant video. The following table lists the encoding requirements for the supported video formats. You can just skip this section for now, if some or all of the terms in the table are foreign to you.

Format	Frame Rate	Frame Resolution	Aspect Ratio	Encoding Bit Rate	GOP Size
MPEG-1 NTSC (525/60)	29.97 fps	352 x 240	4:3	1.856 Mbps max.	18 frames max.
MPEG-1 PAL (625/50)	25 fps	352 x 288	4:3	1.856 Mbps max.	15 frames max.
MPEG-2 NTSC (525/60)	29.97 fps	720 x 480	4:3, 16:9	9.80 Mbps max.	36 fields/ 18 frames max.
MPEG-2 PAL (625/50)	25 fps	720 x 576	4:3, 16:9	9.80 Mbps max.	30 fields/ 15 frames max.

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