creating background for chroma key

[bill hash]

If I paint a backgound for chroma key in photoshop(or corel painter)what DPI should it be for mini dv and hdv. I am very well versed in having talent seperate from the greenscreenlighting as well as haing seperate lighting as well for the talent so lets consider that is not an issue.

[Tim Kurkoski]

DPI is irrelevant to video. DPI is a relative measure to the real world (inches being a real-world measurement), and since your video should be displayed across the whole screen regardless of the size of display, a real world measurement has no relevance.

All that matters is that your video frame is the correct size for your format- 720×480 for DV NTSC, and 1280×720 or 1440×1080 for HDV.