win98 -- what would cause a dropped frame every 20 minutes?

Discussion in 'Amateur Video Production' started by wowfabgroovy, Jul 3, 2004.

  1. wowfabgroovy

    wowfabgroovy Guest

    i've set up a clean install of win98 (on a removable hard disk) just
    for running studio 9 and capturing with a dc10plus. i haven't
    installed anything else, and i've disabled all hardware except for the
    capture card and sound card (and anything else that's necessary, like
    mouse, etc). i've disabled read ahead and write behind optimisation,
    and disabled auto insert for the cdroms. i've disabled all run and run
    service programs through the registry and changed streamerrorhandler
    to 0. resolution is set at 800x600 16bit colour. there are no screen
    savers or power management settings active. but something seems to be
    kicking in like clockwork every 20 minutes or so and causing a dropped
    frame. any ideas what?
     
    wowfabgroovy, Jul 3, 2004
    #1
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  2. wowfabgroovy

    V Green Guest

    might be the capture driver/app compensating for audio stream drift
    by inserting/dropping a frame to bring things back in line.

    you won't notice it, in any case...

    (1 frame out of 30,000)
     
    V Green, Jul 4, 2004
    #2
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  3. wowfabgroovy

    Rick Guest

    Is this machine on a network? If DHCP is enabled try disabling it.

    Rick
     
    Rick, Jul 4, 2004
    #3
  4. wowfabgroovy

    Damien Evans Guest

    you won't notice it, in any case...
    I would disagree - if a dropped frame is in the middle of a panning shot it
    would be very jarring indeed and unless you're compiling a family video of
    the kids it'd be unacceptable.
     
    Damien Evans, Jul 4, 2004
    #4
  5. wowfabgroovy

    Damien Evans Guest

    I would disagree - if a dropped frame is in the middle of a panning shot
    it
    I use a program called Virtual VCR for capturing which resamples the audio
    'on the fly' to avoid the need to add/drop frames.
     
    Damien Evans, Jul 4, 2004
    #5
  6. wowfabgroovy

    V Green Guest

    I would disagree with your disagree...

    An event of 1/25 of a sec will not be noticeable
    UNLESS you're looking for it ;-)

    Try it yourself, with your editing s/w-
    yank a frame out of a clip and then watch it.

    Bear in mind what I said, YOU will
    be purposefully LOOKING specifically
    for the glitch, so show it to somebody else.
     
    V Green, Jul 4, 2004
    #6
  7. wowfabgroovy

    twobirds Guest

    It seems far from the normal topic where I have read your advice so often
    about compressed audio:

    Boot up, start - run - type in msconfig - choose selective startup - reboot
    and start capturing again. Bob's your uncle.

    I don't have a 98 box on my network right now, so I don't have the exact
    process at my fingertips, but I beleive that the same thing that restarts
    defrag in W98 and W98SE could be plaguing your capture.
     
    twobirds, Jul 4, 2004
    #7
  8. wowfabgroovy

    Gordon Abbot Guest

    Could it be win98s file size limitation and you are shifting from one
    2/4 gig file to the next file?

    GA
     
    Gordon Abbot, Jul 4, 2004
    #8
  9. wowfabgroovy

    wowfabgroovy Guest

    no, if it was that it would happen every 5 minutes and 30 seconds.
    that's how long a 2gig avi file with my settings lasts for.
     
    wowfabgroovy, Jul 4, 2004
    #9
  10. wowfabgroovy

    Brian Guest

    Try defragging your hard drive.

    Regards Brian
     
    Brian, Jul 4, 2004
    #10
  11. wowfabgroovy

    Bariloche Guest

    What is this? And why?
     
    Bariloche, Jul 4, 2004
    #11
  12. wowfabgroovy

    wowfabgroovy Guest

    it's a setting in the registry for the dc10plus driver. by default
    it's set to 1 and will cause a dropped frame every time there is a
    very slight fault on the video tape. it seems to have been removed
    from the xp drivers, hence the reason for using win98 for capture.
     
    wowfabgroovy, Jul 5, 2004
    #12
  13. wowfabgroovy

    wowfabgroovy Guest

    the hard drive is always empty when i capture.
     
    wowfabgroovy, Jul 5, 2004
    #13
  14. wowfabgroovy

    Tom Ellliott Guest

    W98 has a capture limitation of 18minutes because of the file size
    limitation of W98. Wxp does not have this limitation.
    Personally I never felt it was a limitation for after all in the REAL world
    of film making they only have 10 minute film loads. As the transision
    progresses to HD you will be able to let the cameras roll all week long,
    space available of course.
    Yours,
    tom
     
    Tom Ellliott, Jul 5, 2004
    #14
  15. wowfabgroovy

    Gordon Abbot Guest

    So it is a factor of 4 (to get to 20 min) or an 8 gig file. Maybe that
    is a limit on the partition and the recording program shifts to another
    partition? I know some programs (like vdub) do allow you to set limits
    in a partition and shift to another partition.

    Still guessing.

    GA
     
    Gordon Abbot, Jul 5, 2004
    #15
  16. wowfabgroovy

    wowfabgroovy Guest

    any idea what it's called? i couldn't find any reference to anything
    like that in any of the usual startup places.
     
    wowfabgroovy, Jul 5, 2004
    #16
  17. wowfabgroovy

    wowfabgroovy Guest

    i think that's a bit of a red fish. changing the compression rate (and
    therefore increasing the number of minutes per 2gig file) doesn't make
    any difference to the frequency of dropped frames. it's still one
    every 20 minutes.
     
    wowfabgroovy, Jul 5, 2004
    #17
  18. wowfabgroovy

    Gordon Abbot Guest

    run Sisoft Sandra and see what is running.

    GA
     
    Gordon Abbot, Jul 6, 2004
    #18
  19. wowfabgroovy

    Tony Guest

    How old is the HD you're running? If it's older, you may be experiencing
    thermal recalibration - that's more likely to hit the 20-minute interval.
     
    Tony, Jul 6, 2004
    #19
  20. wowfabgroovy

    Markus Zingg Guest

    i've set up a clean install of win98 (on a removable hard disk) just
    Vance is definately right with his statement. The drop is here to
    compensate a very minor audio / video drift.

    As he pointed out you will not be able to notice this in the final
    production. Resampling the audio as Damien sugested would be a
    similar aproach and while some people say that they could see one
    missing or double frame out of 30'000 there are also people which say
    they could hear the resampling of the audio...

    Markus
     
    Markus Zingg, Jul 6, 2004
    #20
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