6 Replies Latest reply: Nov 6, 2006 2:23 PM by David Babsky
Ourdream Level 1 Level 1 (5 points)
How many MBs in a GB?
I know its a simple thing that i should know but I dont, so laugh at me a little before reply.

Mac Mini, Mac OS X (10.4.7), intel
  • David Babsky Level 6 Level 6 (14,175 points)
  • Ourdream Level 1 Level 1 (5 points)
    How many MBs in a GB?
    I know its a simple thing that i should know but I
    dont, so laugh at me a little before reply.


    So I I should get 4000MBs on a single layer DVD (4 GB) Right
  • Klaus1 Level 8 Level 8 (46,945 points)
    Right!

    However, iDVD does not care about size but length, which is maximum 2 hours, including themes, music, effects etc.

    Best to keep it under 90 minutes.

    By the way, in iMovie you will see that DV footage imports at the rate of 13GB (1,300 MB) an hour. Don't panic! It will reduce to a proper size when you have imported into iDVD!

    We don't laugh at people here, we all had to start somewhere. Feel free to come and ask more questions and we will do our best to help you.

    If the subject changes, then please start a new thread.
  • David Babsky Level 6 Level 6 (14,175 points)
    As Klaus says, although 4GB of movie in iMovie is only about 20 minutes' running time, don't worry: you can fit just under 2 hours onto a DVD, because when your movie is handed over from iMovie to iDVD, iDVD compresses the video into a different format called MPEG-2.

    That -squeezes- up to 2 hours' running time onto a 4.7GB DVD, because instead of each frame of your movie taking up the same space as every other frame (..as it does in iMovie's DV format), the -squeezed- MPEG-2 consists of 'key' frames, followed by just descriptions of any differences between the 'key' frame and the ones which follow it.

    That makes the movie much more compact, so that a great deal more than you expect can be fitted onto a single video DVD.

    [..The huge cratefuls of individual apples which make up the frames of your movie in iMovie are compressed into a much smaller jar of apple juice when the movie is squeezed by iDVD..]
  • Robert Weigant Level 1 Level 1 (5 points)
    The exact number can be any one of the following:
    1 kB = 1,024 bytes
    1 meg= 1,048,576 bytes
    1 gig= 1,073,741,824 bytes
  • David Babsky Level 6 Level 6 (14,175 points)
    But read on, Robert, to see if the numbers have any relevance here.. ...