Video to PC

Discussion in 'Video Cameras' started by Margaret Willmer, Nov 27, 2006.

  1. Margaret Willmer

    Nik Guest

    Thanks, Tony; and to Jukka.

    Nik
     
    Nik, Nov 29, 2006
    #21
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  2. Also, remember that with DV you're dealing with tape - i.e. from a mechanical
    device whose data stream cannot be modified. I think I should probably add
    "easily" there :)

    It may well that with camcorders moving to solid state recording or hard drives
    that USB may well be the future for transfer between devices.


    regards

    Stuart

    www.mckears.com
     
    Stuart McKears, Nov 29, 2006
    #22
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  3. Margaret Willmer

    Jerry Guest

    More to the point, seeing that most MB come with at least one 1394
    port is there any reason to consider using USB for video transfer....

    For external storage surely the way to go these-days is to use a HDD
    via 100/1000T LAN?
     
    Jerry, Nov 29, 2006
    #23
  4. Margaret Willmer

    Just D Guest

    The real speed depends on many different conditions. In my case when I use
    both ports with the same combo boxes, at least 3 different models including
    2.5 and 3.5, and fast and very fast hard drives, I don't see any difference
    in the speed. Same 40 MBytes/sec - that's maximum that I can get at the
    peak. Usually a little bit less, something about 36-38 MBytes/sec.
     
    Just D, Nov 29, 2006
    #24
  5. Margaret Willmer

    Just D Guest

    That's exactly right. That's why I'm using Firewire for DV, but mostly USB2
    for all my external drives even having both ports since they are combo, same
    speed, but I don't need an additional power supply if I use 2.5 HD with the
    external case, very convenient for traveling. Pocket size mobile hard drive
    with the current maximum capacity of up to 180 GBytes. Very nice! At least
    20-40 GBytes after we upgrade our old laptops installing newer hard drive
    and releasing the current one for using it in the hard drive external box.

    Just D.
     
    Just D, Nov 29, 2006
    #25
  6. Margaret Willmer

    Just D Guest

    I can't agree here. Using LAN for that purpose loads CPU so much and the
    speed is not enough even when I use my home gigabit network. There are a lot
    of reason including a very high fragmentation of network packets and it
    requires a very high CPU load to create this stream and then reassemble it
    on the remote part. Maximum speed that I'm able to get on my gb LAN is 20
    MBytes/sec, maybe 21 if the day very good, but mostly 16-18 MBytes/sec.
    Instead any external box is able to give be about 36 MBytes/sec. I'd say LAN
    based external hard drive is maybe good for the office use, but for home...
    Not sure that the LAN based hard drive is much better and faster than my
    file server having 3.2 HT + 2 GB RAM and huge RAID. And even this power is
    not enough to keep the stream significantly above 20 MBytes/sec for a very
    long time.

    Just D.
     
    Just D, Nov 29, 2006
    #26
  7. Margaret Willmer

    Tony Morgan Guest

    That's exactly right. That's why I'm using Firewire for DV, but mostly USB2
    for all my external drives even having both ports since they are combo, same
    speed, but I don't need an additional power supply if I use 2.5 HD with the
    external case, very convenient for traveling. Pocket size mobile hard drive
    with the current maximum capacity of up to 180 GBytes. Very nice! At least
    20-40 GBytes after we upgrade our old laptops installing newer hard drive
    and releasing the current one for using it in the hard drive external box.
    [/QUOTE]
    Since relatively recently replacing my desktop PC with a Dell XPS M1710
    laptop, I'm running two 250G and one 400G external USB2 hard drives. I
    didn't go the 2.5 HD route since higher than 80G are very expensive -
    and of course they all seem to run at less than 7200rpm.
     
    Tony Morgan, Nov 29, 2006
    #27
  8. Margaret Willmer

    Tony Morgan Guest

    Cost?

    In a similar vein, when I get back from my holidays I'm going to get the
    new Netgear SC101. A friend's just fitted one. It give wireless
    connection to two IDE hard drives (of any size).

    I'm already using a Netgear GP5606 which gives me wireless connection to
    two USB2 printer ports as well as four 10/100T ports. The Ethernet ports
    are an overkill for me since I'm already running a Netgear DG834G.

    All with WPA security of course :)
     
    Tony Morgan, Nov 29, 2006
    #28
  9. Margaret Willmer

    Jerry Guest

    Storage is not the same as capture, sure I would not use a LAN (other
    than perhaps optical) for real time capture but then again people
    like Avid use it all the time....
     
    Jerry, Nov 29, 2006
    #29
  10. Thank you for that suggestion, I hadn't thought of it actually, but I
    can see that it makes sense, especially the focus.

    Margaret
     
    Margaret Willmer, Nov 29, 2006
    #30
  11. Margaret Willmer

    G Hardy Guest

    Aha. I had "a tit" so I wasn't far out.

    It's not too much extra, and it's worth having for the extra flexibility.
    Bear in mind that USB is not particularly well behaved when it comes to
    multiple devices, so with certain chipsets, you might find that you lose
    speed just by having (say) a USB1 modem attached to the bus. If you are able
    to switch over to firewire in such an event, it means that you're not having
    your available connected hardware dictated to you by other connections.

    There's no valid reason, as others have mentioned. I have a little MPEG
    capture device for analogue video that works through USB2. Trying to capture
    at DVD resolution is extremely hard, even though USB speed and the PC it's
    connected to are both up to the job.
     
    G Hardy, Nov 29, 2006
    #31
  12. You may have actually stumbled on a connection method that IS a
    bottleneck in video capture :)
     
    Laurence Payne, Nov 30, 2006
    #32
  13. Margaret Willmer

    Tony Morgan Guest

    You might be right, but I suspect that the 54Mbps wireless 'bottleneck'
    will cope - especially since I've used a Bluetooth link from Cam to
    laptop on capture (and out to HDD via USB2).
     
    Tony Morgan, Nov 30, 2006
    #33
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