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  1. Apparently, the -VR format refers to file names, while DVD-Video refers to LBAs (started playing at 28 seconds when copying DVD but with missing ISO9660 bridge and new UDF 2.00 instead of 1.02.).

    But how is it possible to manipulate an IFO file to refer to MP2/MPG or even audio such as WAV, M2A files, AC3 audio files and MP3? (which are the standard audio formats in DVD-Video. Not MPEG-4. But SunPlus supports MPEG4.
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  2. MP3 is not compliant DVD audio.

    If your MPG is DVD complaint, then you can easily make a DVD from it. If it isn't (wrong resolution, framerate, audio, etc), then you can't and most likely your standard standalone DVD player can't play it.

    And DVD players don't play VOBs; they play DVDs. If you tried to play a VOB through a standalone DVD player without the associated IFOs, it won't.
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  3. Originally Posted by manono View Post
    MP3 is not compliant DVD audio.

    If your MPG is DVD complaint, then you can easily make a DVD from it. If it isn't (wrong resolution, framerate, audio, etc), then you can't and most likely your standard standalone DVD player can't play it.

    And DVD players don't play VOBs; they play DVDs. If you tried to play a VOB through a standalone DVD player without the associated IFOs, it won't.
    I know, they play DVDs, not VOBs.
    Can a DVD player be fooled to play different files in different directories than /VIDEO_TS/*.VOB by manipulating the IFO contents?

    Some DVD firmwares such as DV-RW250 can play individual files such as MP3, WMA (I wish: XIPH,WAV,AIFF too) on CDs but not on data DVDs or UDF CDs due to firmware programming laziness.

    Additionally, the firmware does support a heavily patented WMA and DVD-Video wirh PCM audio format, but no WAVesound? And DVD but no MPG files? Definitely laziness.
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    The information in the IFOs describes various characteristics of the DVD's VOBs files which are needed to play them correctly. There is no way to modify IFOs to allow playing file types other than VOBs inserted in a DVD structure because playback is handled by firmware. ...and a DVD player's firmware won't play other kinds of files inside a DVD structure because it is expecting VOBs. Even MPG files have a slightly different file structure than VOBs and probably wouldn't play properly.

    Some DVD players may include firmware with additional capabilities and decoders which permit the player to recognize and play DivX or MP3 files and display JPEG photos, but it would not look for them inside a DVD structure.

    You have a hell of a lot of nerve calling somebody lazy for doing their job properly by following the standard governing video DVDs.

    [Edit]If you want something that plays a variety media files on optical media, get a Blu-ray player. There is absolutely no financial incentive to add more features to DVD players, which are now a cheap commodity.
    Last edited by usually_quiet; 28th Jan 2018 at 15:26.
    Ignore list: hello_hello, tried, TechLord, Snoopy329
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  5. Member Cornucopia's Avatar
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    @Techlord, this topic is basically a rehash of another earlier one where I tried to put to rest your (faulty) assumptions. Looks like you still have them.
    One thing that would help you to wrap your mind around these various tech "inconsistencies", as you might want to call them, is if you looked at the choices of the manufacturers from their PRODUCER perspective as opposed to your CONSUMER one.
    They want to offer support for things THEY think you want, not what YOU think you want or need. They're listening to other producer industry people/corporations like themselves for what that might be - rarely actually listening directly to consumers. Except for where they can see quantifiable sales stats. They don't see or believe stats on file sharing, DIY, or peer-to-peer, except to where they attempt to claim losses from piracy/bootlegging.

    So whether it is preferable or logical to consumers or not, it makes sense that they would only support what other producers are saying is being put out for sale: CD Audio, DVD-Video, BD and UHDBD, and downloadable/streamable drm files or channels. About all they'll do otherwise is give a nod to common current consumer camera mp4 offerings, since that doesn't require any ADDITIONAL licensing beyond what they've already agreed to.
    Wmv & Divx are legacy now, but WERE being offered by producer types, so those are the exceptions until such time as they are no longer cost effective to license, or the use of existing material drops below some threshold.

    ********

    Both VR mode discs and Video mode discs, and their players, primarily utilize direct LBA/Sector addressing NOT filesystem addressing, except when used in computers apps. So as usually_quiet said, the drive starts by reading the IFO (or equivalent) which is a glorified TOC (table of contents) and that tells the player where else to go. The difference between the 2 formats is mainly one of permanancy: Video mode has its TOC set in stone, while VR mode has to also incorporate multiple sessions with additions, erasures, fragmentation, multiple frame property changes, reorganized menus & navigation, etc., so is much more complex.

    Scott
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