The following chart came from MONTAGE & ACCESSOIRES VIDEO

Since it's in French, but seems quite straightforward in its content. The following chart equates various tape qualities to a roughly equivalent JPEG quality, then indicates how many minutes of video can be stored at that rate on 1.0, 2.1 and 4.3 GB hard drives. This was on a page specifically about VLM, DraCo and Movieshop.
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Le petit tableau qui suit vous permettra d'avoir une bonne idée des durées possibles en minutes.

                          JPEG.....1.0GB.....2.1GB.....4.3GB



VHS Haute qualité..........60........22........44........88

SVHS normal................65........18........36........72

SVHS Haute qualité.........70........16........32........64

Hi8 normal.................75........13........26........52

Hi8 Haute qualité..........80........11........22........44

Betacam SP.................90.........9........18........36

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Page created by: Bob Bennett