iDVD size issues?

Discussion in 'Mac Basics and Help' started by Mabyboi, Jul 13, 2010.

  1. Mabyboi macrumors 6502

    Mabyboi

    Joined:
    Apr 23, 2010
    Location:
    Ontario, Canada
    #1
    Im trying to create a few DVD's on iDVD. The files range in the 200mb-900mb size, and the instant I put any of them into the program they quadruple in size... why is this happening?

    ex. 800mb file becomes 4200mb in iDVD..

    thanks!:apple:
     
  2. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #2
    I think iDVD changes the format thus the size. For example, a ripped DVD is around 4GB but that will shrink to near 500MB when encoded, without big loss in quality.
     
  3. spinnerlys Guest

    spinnerlys

    Joined:
    Sep 7, 2008
    Location:
    forlod bygningen
    #3
    As Hellhammer already hinted at change in file size, I will just confirm that by adding, that video DVDs use the MPEG-2 codec, which is not as space efficient as MPEG-4 codecs like Divx, Xvid or H264, which are often used for encoding content to distribute them in smaller sizes. Commercial video DVDs are often burnt onto Dual Layer (DL) DVDs, which can hold up to 8.5 GB (7.9 GiB) to store two to three hours of video (main title, extras, menus, ...), Single Layer (SL) DVDs can hold up to 4.7 GB (4.38 GiB), thus only being able to store 60 to 90 minutes of properly encoded video.

    As MPEG-4 encoded video is only 700MB for 90 minutes of video, you will see an increase in file size as it is transcoded into MPEG-2 video.

    Btw, your thread title is very unspecific and "violates" forum rules. (see rule #3 under Minor Problems)

    To edit your thread title, just click on the [​IMG] button on the bottom right of your original post and then click the "Go Advanced" button below your message.
     
  4. Mabyboi thread starter macrumors 6502

    Mabyboi

    Joined:
    Apr 23, 2010
    Location:
    Ontario, Canada
    #4
    thank you for helping me out, and my apologies for the title, i will fix it now.
     

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