Splitting DV-AVI

Discussion in 'Amateur Video Production' started by kaczor, Mar 6, 2005.

  1. kaczor

    kaczor Guest

    I am a newbie, but a newbie who is going insane over this...

    I have a bunch of DV-AVI files that are over 4GB in size. I want to
    split them into smaller files, such that I can use the Panasonic
    DVConverter to convert to AVI type 2.

    I read about using VirtualDub for splitting files w/out re-rendering,
    which is what I am hoping to do. However, I am not able to load the
    DV-AVI file, even after installing the MainConcept DV coded Demo.
    I still get the "VirtualDub cannot extract audio..." error message, and
    thus, splitting files results in loss of audio.

    Can someone please enlighten me? This should not be this challenging!

    Thank you kindly.

    Pawel
     
    kaczor, Mar 6, 2005
    #1
    1. Advertisements

  2. kaczor

    don Guest

    I went thru all this too. I got lucky. I found a very old copy of
    Ulead v4 basic that came with my old Matrox Rainbow runner and that
    worked. I tried all the tools that you are talking about and for one
    reason or another I never could get them to work. They should have but
    as you are observing somehow they didn't.

    Maybe you could get an old ulead on ebay.

    BTW, what is AVI type 2?

    good luck.
     
    don, Mar 6, 2005
    #2
    1. Advertisements

  3. kaczor

    kaczor Guest

    I actually found a program that seems to do a relatively good job:
    Solveig AVI trimmer. I believe it does not re-render the files, and is
    relatively fast.

    http://www.solveigmm.com/?Products&p=AVITrimmer
    I am not an expert, but I belive that the only real difference between
    AVI type 1 (DV-AVI) and AVI type 2 is that the latter has a separete
    audio track, in addition to the interleaved one.

    A proper explanation, from another post:

    Markus Zingg Jan 4 2004, 11:33 am
    Newsgroups: rec.video.desktop
    From: Markus Zingg <>
    Date: Sun, 04 Jan 2004 20:33:27 +0100
    Local: Sun, Jan 4 2004 11:33 am
    Subject: Re: What does type-1 and type-2 mean?

    ....

    However,
    the difference between type 1 and type 2 avi is:

    Type 1 DV avis actually contain the data mostly as it came in from the
    camcorder just lightly wrapped into the avi file format. With DV avi,
    audio is interleaved into each video frame. That's one of the main
    reasons why DV avi is usually quite resistant to a/v synchronisation
    issues.


    Type 2 DV avis also contain the original data stream as sent from the
    camcorder. However, the capture application - during the capture
    process - extracts the audio part out of the frames and a second
    dedicated audio data stream is stored within the avi file. If this is
    done propperly this does not form a problem.


    The advantage of type 1 avi's is that they obviousely need less space
    on the HD and need less processing power during capture. The
    disadvantage fo type1 avi's is that they are not compatible with
    standard avi's. Standard avis always expect a dedicated aditional
    audio datastream and in order to avoid problems. M$ created the avi
    type 1 specification so as this kind of files get a special header
    which avoids that standard software can operate on them. A severe
    disadvantage of type 1 avi's is that the editing process is a lot more
    complicated because audio must be constantly written into the video
    frames to the propper places and those who know the DV format in
    detail will agree that this is a night mare. The DV format was choosen
    with robustness with regard to the camcorder hardware (video heads &
    tape) in mind. From a software only point of view it apears to be
    braindead but it's of course not.


    The advantage of type 2 avi's is that they can be processed with any
    video editing/processing software povided a working DV decompression
    filter or codec (depending no the technology used by said software) is
    installed in the system. The disadvantage with type 2 avi's is that
    they are slightly bigger (due to the doubled audio data). Editing is -
    as oposed to type 1 - not more difficult that with any other avi
    format. The original audio data within the video frames just remains
    there unchanged, the aditional audio stream contains the "real" audio
    data. This showes another disadvantage of type 2 in that the audio
    data - during print back to tape - must be injected into the video
    frames before they are transmitted to the camcorder.


    You can see that both formats have their pros and cons. If you have
    compatibility / interoperatibility in mind, type 2 is the way to go.
    If all the software you intend to use supports type 1 then there is
    nothing wrong with using type 1. Btw, there is an easy trick to
    remember which is which. Type 1 means 1 audio stream (the original
    one) type 2 means two audio streams (the original one and the copy).
     
    kaczor, Mar 6, 2005
    #3
  4. kaczor

    PTravel Guest

    Scenealyzer (the free shareware version, not Scenealyzer Live) will
    automatically split DV-AVI files. Note, though, that you must have the
    proper codec installed in your computer.
     
    PTravel, Mar 7, 2005
    #4
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.