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Space issue for burning a 4.3 GB movie onto a 4.7 GB DVD

kilian13000 Posted messages 1 Status Member -  
ziggourat Posted messages 24624 Registration date   Status Contributor Last intervention   -
Hello everyone,

I’m facing a problem that doesn’t seem logical to me.

I digitized some VHS tapes using "Save Your Tapes" and I’m trying to burn the generated 4.5 GB file onto a 4.7 GB DVD (Deep Burner), but it only burns about 10 minutes of film.

I tried with Windows Media Player and upon inserting the DVD without any action, it already informs me that I only have 4.3 GB free. Therefore, as soon as I drag the file to burn (4.5 GB), it refuses and tells me "file too large."

I’ve tried with several brands of DVDs. It’s hard to make sense of it, lol.

Have you encountered this kind of problem or do you have an explanation, please?

Thank you for your answers.

Best regards.

3 answers

  1.
    tribun Posted messages 64900 Registration date   Status Member Last intervention   12 687
     
    Hello.
    I believe that on a 4.7 GB DVD, the default storage capacity is 4,483 MB in total.
    You have to keep in mind that 1 GB = 1024 MB and not 1000 MB.

    He who loves instruction finds knowledge that comes from reflection!
    P.S. Often create a restore point! It solves quite a few problems.
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  2. Cloturernapasdesensfigure Posted messages 117 Status Member 5
     
    Hi,
    Yes, I think I can guess what the problem is if you're on Windows.
    Windows does not display the actual size of a file because it incorrectly assumes that 1KB = 1024B, 1MB = 1024KB, and therefore 1GB = 1024MB = 1073741824B, which is wrong! (A "GiB" notation was even standardized in 1998 to avoid these misnotions, but Windows doesn't correct it to remain compatible with what it did before... probably... anyway)

    So, taking into account that 1 "Windows GB" = 1073741824, your file should actually be 1073741824 * 4.5 = 4831838208B, or just over 4.8GB real.
    The DVD indicates a true capacity of 4.5GB, so your file is too large.

    PS: By right-clicking on your file in Windows, it should show you the actual size in bytes somewhere.
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    1. Cloturernapasdesensfigure Posted messages 117 Status Member 5
       
      ps2 : Windows / Windows Media Player tells you that the DVD is 4.3 "GB Windows" because it performs the inverse operation 4700000000/1024/1024/1024= 4.377216101
      So 4.7 GB =~ 4.38 "GB Windows"
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  3. ziggourat Posted messages 24624 Registration date   Status Contributor Last intervention   5 342
     
    Hello,

    As mentioned above, the actual capacity of a 4.7 GB DVD is a maximum of 4.38 GiB.
    Explanation: https://www.commentcamarche.net/faq/8939-mon-disque-dur-ne-fait-pas-la-capacite-en-go-annoncee
    And do the calculation...
    Also see Byte on Wikipedia to understand the units of computer measurement: https://fr.wikipedia.org/wiki/Octet

    Thus, physically, it is not possible to fit 4.5 GB of data on a DVD advertised as having a capacity of 4.7 GB. Therefore, you will need to compress or re-encode your file to fit it on your disk.

    Best regards
    --
    Long live Bobo! ~ Little fish will grow big ~
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    1. Cloturernapasdesensfigure Posted messages 117 Status Member 5
       
      4.5 Gio :-)
      4.5 Go is fine
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    2. ziggourat Posted messages 24624 Registration date   Status Contributor Last intervention   5 342
       
      If you say so... what's the problem?
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    3. Cloturernapasdesensfigure Posted messages 117 Status Member 5
       
      Well, you said "So physically, it's not possible to fit 4.5 GB of data on a DVD marketed with a capacity of 4.7 Go/GB."

      4.5 GB fits on 4.7 GB, but 4.5 GiB doesn't fit in 4.7 GB

      At the beginning of your response, you correctly talk about GB/GiB, but then you mix the two, which is why I replied.
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    4. ziggourat Posted messages 24624 Registration date   Status Contributor Last intervention   5 342
       
      It’s possible that I confused the terms… but let’s wait for kilian13000's response since we won’t discuss among ourselves as we agree ;)
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