having trouble capturing video off my mini dv camera

Discussion in 'Video Cameras' started by webster, Nov 30, 2003.

  1. webster

    webster Guest

    i am having trouble capturing video off my mini dv camera with a 1394 card.
    When i first plug it in after a boot it works fine but if i try to access it
    a second time the computer does not see the video camera. i have used
    numerous video capturing programs but i get the same result for each. Also
    if i start capturing video from the camera and about 20 mins into the
    recording the recording stops (this it not a power problem, the cam is
    plugged into the mains power). Im not sure whether its the 1394 card or if
    its my video camera.
    i am using...
    Windows xp
    Sony DCR-TRV33E mini DV camera
    Sunix PCI 1394 Card FW3000SC
    the supplied cable that came with the firewire card

    webster, Nov 30, 2003
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  2. webster

    Tony Morgan Guest

    The first problem can probably be solved by closing all other programs,
    and running EndItAll before you start any video work.

    The second problem can probably be fixed by converting your filesystem
    to NTFS.
    Tony Morgan, Nov 30, 2003
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  3. webster

    Jerry. Guest

    How does running EnditAll help the computer to / 'see' / the camera ?
    [ Another case of Mr Morgan not reading the OP I suspect.... :~( ]

    Is the OP keeping the camera plugged into the IEEE1394 port all the time
    during this period ?
    Jerry., Nov 30, 2003
  4. webster

    webster Guest

    im not sure what you mean... I have tried leaving my camera on and connected
    though out start up and also turning on after start up. When i do plug it in
    i plug in and then turn it on and then turn off then unplug.

    someone told me you can only use sonys cable, is this true?

    I shouldn't need to change my system to ntfs, aren't these thing suppose to
    be easy to set up?

    webster, Dec 1, 2003
  5. webster

    admin Guest

    you are restricted to 20mins with FAT system, with NTFS, you can increase
    your boundary.
    admin, Dec 1, 2003
  6. webster

    Tony Morgan Guest

    The clue is in the phrase "When I first plug it in after a boot it works
    fine but if I try to access it a second time the computer does not see
    the video camera."

    Video editors use DLLs, so the first time the program's capture process
    is run the capture DLL is using real memory. The second time (if there
    are too many background processes) the capture DLL has to be swapped in
    and out of virtual memory (aka the hard disk). Because capture is a
    real-time process, any half-competent programmer would shut the process
    down if the read (from camcorder) buffer goes above the 75% watermark
    for more than a few milliseconds. This avoids "losing" sizeable chunks
    of the video being captured. If you lose just a few frames it is usually
    indicates that available real-memory is in a marginal condition (that's
    why most video editors report "lost frames".
    I think he's answered this in his response. I'd have hardly expected him
    to disconnect firewire, and then expect to capture :)
    Tony Morgan, Dec 1, 2003
  7. webster

    Jerry. Guest

    The above could mean many things, he could have been switching the camera
    off for example, and when he goes to 'access it for a second time' and
    switches it back on (he has since clarified this though)....
    So how come many people never use EnditAll (some have never heard of it
    even) and they have no problems ?

    Could they be using sufficient memory to prevent the above being an issue ?
    Jerry., Dec 1, 2003
  8. Firewire should be hot pluggable - my XP, AMD 1.4G, 80Gig dedicated hard drive,
    Vegas system with on board IE1394 works perfectly and doesn't drop frames even
    when getting new mail.
    Without going back through this tread, AFAICS the problem is with PCI Firewire

    When EnditAll closes applications, this may release interrupts or remove
    conflicts on the PCI bus. Equally, it releases more of the CPU's time to the
    firewire service. On a slower or under resourced box, this could well cure any
    firewire problems.

    I've had a quick look at Vegas capture process data and that seems to use around
    40Mb of memory (other capture processes are probably similar) so if the machine
    is not under resourced then my guess, especially in view of the camera only
    being recognized initially, would be a conflict with another PCI/AGP card.

    Swap your cards around or remove all the other cards and see if firewire works


    Stuart McKears

    Stuart McKears, Dec 2, 2003
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