DVDIt requires 5.6GB dvd disk capacity for ca. 4.7GB A/V input files

Discussion in 'Amateur Video Production' started by Peter, Jan 17, 2005.

  1. Peter

    Peter Guest

    Hello Folks!

    I have a weird problem:

    I have produced two files that I am going to burn on DVD (1h35min of

    MPEG video (VBR 6400k, Max 8200k) - file size 4'695'412'522 bytes
    Audio (MPEG2, 48kHz, 384kbps, joint Stereo) - file size 273 187 584

    A sum of these two files actually exceeds 4700.... bytes - is around
    4968.... bytes, but I tried to do such a DVD image (VOB/IFOs) first on
    my HDD. However, DVDIt does not allow me to start compile this project
    when I set disk capacity parameter less that 5500MB.

    What for is this additional 500MB??? It is a very big payload.

    I know that 4968MB is higher than 4700MB and I must reduce it by
    268MB, but I am worried because I will need still these 500MB which
    simply will require from me significant reducing of quality I suppose
    ca. avg 6000k or less.

    Why DVDit needs much more capacity than input files. Is this a way to
    calculate what will be a total VOB file size for input audio/video
    file sizes?

    Unfortunatelly, I was not able to check whether the output DVD files
    are really ca. 5500 MB, as DVDIt initialy says, beacause during the
    compilation DVDIt said that multiplexed rate is too high or so and
    stopped compiling (By the way, is 8200 + 384 too high according to the
    DVD spec.?).

    Peter, Jan 17, 2005
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  2. Instead of changing your data rate, compile the project as is onto your
    hard drive, and then use DVDshrink to fit it onto a DVD:


    This free utility is a fantastic tool, and if you haven't tried it yet,
    you are missing something.
    BrianEWilliams, Jan 17, 2005
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  3. Peter

    piterek9 Guest

    Thanks Larry! The reason was that DVDIt 2.5LE was changing my .mpa
    compressed voice to uncompressed while building VOBs. Very strange! I
    have no infulence on such settings! The reason for my value settings
    was input perfect DV material so I wanted to avoid any artifacts in
    compressed material. It is interesting that VBR 6400k & Max 8200k is
    worse (in quality sense, not size) that CBR 6000k. Did you realy
    observed it? I guess that CBR 6000k and VBR 6000k should produce the
    same filesize, i do not know about quality. And what about MIN
    parameter - I had set ca. 3800 is not it too high. If so, what are the
    piterek9, Jan 20, 2005
  4. You are very welcome! When you try DVDShrink, you'll be surprised at
    how little it lowers video quality.
    BrianEWilliams, Jan 20, 2005
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