Question about DV codecs relationshiop to AVI type, Vid For Windows, Directshow

Discussion in 'Amateur Video Production' started by Doc, Nov 8, 2005.

  1. Doc

    Doc Guest

    Trying to sort out various issues related to DV codecs.

    I'm capturing with Pinnacle Studio 9. According to input I've gotten on the
    Pinnacle forums, it's based on Directshow and only produces Type 2 DV avi

    However, from what I've been able to divine, both the $49 Mainconcept DV
    codec and (freebie) Panasonic DV codecs are designed for Video For WIndows.

    So, why does DV captured on PS9 show the Panasonic codec or Mainconcept
    Codec (whichever is installed) under file properties? Further, when
    processing with Virtualdub, they're shown in the compression codecs list.
    But if they're based on Video For WIndows, why do they even work with DV
    video that was processed on an app that's based on Directshow?

    Further, assuming my initial premises are correct (and if they're not,
    please straighten me out), is there a DV codec that's designed for
    Directshow that can be installed so I can process in Virtualdub, still edit
    with PS9 and stay within the DV realm? Apparently whatever DV codec that PS9
    uses isn't available to Virtualdub.

    Thanks for all shared wisdom
    Doc, Nov 8, 2005
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  2. Doc

    RS Guest

    Are you making an assumptive leap that Pinnacle 9 is an app that lives
    only in the directshow world and therefore anything in and out is
    incompatible with other apps? Pinnacle should just be capturing standard
    Type II DV Avi's, and those files should be usable by any app that can
    import Type II DV Avi's.

    Perhaps you should illuminate more the steps you are taking and exactly
    where its all going wrong. It seems you care capturing with Pinnacle, do
    some processing step with Virtualdub and then wanting to edit some more
    in Pinnacle.

    There should be no specific reason that different, stable, codecs cannot
    live happily on your computer.
    RS, Nov 8, 2005
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  3. DirectShow apps are Video for Windows aware and Microsoft provides a
    "wrapper" to allow VfW codecs to appear as DS ones.

    The reverse ain't so!


    (Did you successfully uninstall the MainConcept codec?)
    John F. Miller, Nov 8, 2005
  4. Doc

    Doc Guest

    Well, that's definitely one of the things that I'm trying to understand.
    Yes, that's correct.

    Ultimately, where it's going wrong is this out of sync audio I'm getting
    when capturing to DV avi via passthrough from a VCR through a Sony Dig8
    camcorder. As I outlined in a different thread, it didn't do this until I
    did a clean reinstall of XP Home. Same machine, same sound card (Audigy2)
    same Pinnacle PS9. Worked fine before, now it doesn't. Doesn't happen when
    capturing mjpeg, just DV.

    Now that I'm focusing on these issues, I've found more things that I don't
    fully understand.
    Doc, Nov 9, 2005
  5. Doc

    Doc Guest

    Okay, that clears some things up. Given this, is there such a thing as a
    Directshow DV codec? In particular, one that Virtualdub will recognize?

    Yes. As it turns out, when installing the MC codec, it puts an uninstall
    utility right in the start>programs menu. Uninstalling the Panasonic codec
    was more involved. You have to go into the registry, simply removing it from
    the codecs list doesn't get rid of it.
    Doc, Nov 9, 2005
  6. A DirectShow DV codec comes with the OS but it isn't the best quality in the
    world, hence why third parties offer alternatives. As far as Virtualdub
    goes, I don't know - my limited (dangerous) knowledge of it tells me its a
    Video for Windows app.
    It sounds like you are trying to find a codec that will eradicate your sync
    problem. I don't think that will help. The problem seems to be more rooted
    in the Type II vs. Type I issue. You state elsewhere that you did a clean
    install - did you change any of the hard drive configurations and/or any
    other hardware? If you have you OS, apps and video files on the same drive,
    it *may* be that the physical layout of where the various bits are has
    changed and the drive heads have to travel further at getting at the
    separate parts of the file (or something like that).

    Also, is your reinstall of XP the same as previous as far as service packs
    and updates go? Are there any background programs running -
    antivirus/spyware etc - that weren't previously?

    John F. Miller, Nov 9, 2005
  7. Doc

    Commentator Guest

    Pinnicle has a small utility on their website that does something with the
    PCI bus timing that you may find helps. It is called the PCI Performance

    I have found that with the same machine and a different build I have needed
    it then not. Give it a whirl.
    Commentator, Nov 9, 2005
  8. Doc

    RS Guest

    Try using the demo of Scenealyzer to capture and see if the same things
    happens. It may just be the Pinnacle capture program.

    The demo is fully functional.
    RS, Nov 9, 2005
  9. Doc

    RS Guest

    Ok, the way I understood it, in a simple firewire capture from the
    camcorder, the codecs are not doing their magic. Its only after you
    caputure and then have some specific command issued, such as "Render As"
    that the codecs get into the act.

    If your pass through captures are getting unsynced, it's probably not
    your codecs that are doing the damage. Its somewhere else along the line.

    Just as an odd question however, if your sound is unsynced, could you
    possibly just move the audio track on the timeline until it is in sync?
    Or is that not realistic in your situation.
    RS, Nov 9, 2005
  10. Doc

    Doc Guest

    The C: drive that has the O/S and apps is now NTFS, before it was FAT32. The
    separate capture drive was NTFS before and still is. Otherwise, I don't
    believe anything else is different however, segueing into your other
    Not sure as to the updates - got the machine with XP ebay with
    no discs, so it was sort of an ahem.... *cough cough*....not altogether
    legitimate copy that the seller installed before shipping. Not sure if they
    did any updates or not. However, now I'm running fully legal.
    No, I'm using a dedicated 120 gig 7200 rpm drive. Same one as before.
    Doc, Nov 9, 2005
  11. Doc

    Doc Guest

    As a follow up, I just got word back from Mainconcept that their DV codec is
    both Directshow and VFW.
    Doc, Nov 9, 2005
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