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Thread: Preliminary MNG format information

  
  1. #1
    jenny's Avatar
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    Post Preliminary MNG format information

    Not really sure what forum this should go in. So I am putting it here.
    For those of you who don't know. The PSP has a comic book reader. This reader use MNG format comics. I got bored and decided to take a look into the format seeing how no one else really has an idea of how it's setup.
    I used the comic Imaginary Boys and one other comic as the comics I used to get this information since it was the smallest ones I have, and it should apply to most of the comics. I'll double check when I get back home.

    Offsets are in Hex.

    Offset 0X00000000 to 0X000004C4: Header information
    This is just a simple header. Seems to be the same for every file. Even the UUIDs are the same.
    Some signs that there is MP4 data present in the file.

    Offset 0X000004C5 to 0X000005CF: Product ID, Release Date, Title.
    The word MP4MUX is in here. Again, some signs of MP4 data in the file somewhere.

    Offset 0X000005D0 to 0X00000700: Comic Description.
    Note this does vary depending on the lengh of description.

    Offset 0X00000701 to 0X00000783: Comic Genre
    Varies in length.

    Offset 0X00000784 to 0X000008CA: Software used, Author, Product Code(?)

    Offset 0X000008CB to 0X00000A4A: Unknown header.
    Has the MSTM/MTHD/MDSD descriptors(?). VPNG is also there so PNG information would also be present in the file.

    Offset 0X00000A4B to 0X00000B12: More comic producer information
    User ID of creator, orginization/company, Content Type(BKDT)

    Offset 0X00000B13 to End: Comic data.
    There are multiple sections of PNG data. Other data may or may not be interleaved in here(MP4 data?)


    If anyone else wants to add anything here, feel free to.

    EDIT:
    I tried to extract one of the PNG sections and no dice. There is something else mixed in with the PNG data. Probably MP4 data. I'll keep trying though.


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    it also has a xradar thing but in japanise i think,what does that do
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    jenny's Avatar
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    Quote Originally Posted by parradoxx View Post
    it also has a xradar thing but in japanise i think,what does that do
    It's a GPS application. You buy the GPS receiver and use the app. It makes the PSP into a GPS unit. It's only for Japan If I remember right. I do know there are other maps as well. Not sure if they have any USA/Canada ones though. Also you can use it with wifi instead of buying the GPS receiver. I had it for a while when PSN was down, but it never ran for me. I just chalked it up to it needing PSN. I should try again and see If I can get it running.

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    ZiNgABuRgA's Avatar
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    Quote Originally Posted by jenny View Post
    Has the MSTM/MTHD/MDSD descriptors(?).
    If they're in lower case, sounds like MP4 boxes.

    Though you haven't mentioned ftyp or mdat, perhaps the two most important MP4 boxes.

    Not sure why a comic book would use an MP4 container though. A series of PNG images makes sense, but if there's little temporal detail like a video, or audio to mix in, it seems rather silly to do.

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    jenny's Avatar
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    Quote Originally Posted by ZiNgABuRgA View Post
    If they're in lower case, sounds like MP4 boxes.

    Though you haven't mentioned ftyp or mdat, perhaps the two most important MP4 boxes.

    Not sure why a comic book would use an MP4 container though. A series of PNG images makes sense, but if there's little temporal detail like a video, or audio to mix in, it seems rather silly to do.
    I haven't thought about that yet actually, thanks. I've been a bit busy with some other things, mainly getting VMWare to work on my machine to really find out anything more than I have.

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    mafia97 is offline -Hacks Neophyte
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    i thought psp comic reader uses .mnb format.
    anyways i think the .mp4 format is there because of transition effects while tuning pages or using autoflow.
    just an idea.
    keep up the good work.

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