Swimming Relay Changeover camera?

Discussion in 'Video Cameras' started by dug, Oct 11, 2006.

  1. dug

    dug Guest

    Hi,

    I was hoping that some of you may be able to give me some advice. I do
    some swim coaching and want to give swimmers immediate feed back on
    their relay change overs. I've been considering DV cameras but as my
    requirements are so modest I was wondering is a cheap digital camera
    may do the trick. I've been considering some low end DV cameras (some
    which I've seen described as toys) or secondhand camcorder with broken
    tape record.

    My criteria are

    1. It has got to be cheap. The cheaper the better as inevitably, on the
    pool side, even with care, it will get damaged and I don't want to be
    heart broken when this happens.

    2. It has to record about 10 seconds of footage at a minimum frame rate
    of 10fps.

    3. Replay

    4. It has to have a display screen, not fussy about size.

    5. Resolution, I am assuming that anything on the market will be good
    enough. If there is a problem I can adjust the shot.

    This, I think, is really the only criteria, nothing else no other
    functionality is required, not even colour!

    Any advice on cameras, DV cameras etc will be greatly received.

    Best wishes,

    Douglas
     
    dug, Oct 11, 2006
    #1
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  2. dug

    Johan Stäck Guest

    dug skrev:
    Douglas,
    I have done something slightly similar to this, but it is a system for
    canoeing. (Goal camera, timing etc)

    I think that DV is the way to go.
    You will not use the tape, but take the firewire data directly into the
    computer.
    The camera can be positioned quite far away from the pool.
    I use 10 meter firewire cables whithout problems.

    Some questions:
    -Do you want to monitor more than one lane? If so, how many?
    -Do you need the replay in slow-motion or even frame by frame?
    (If not, an automatic system with "delayed video" could be deployed)
    10 - 20 seconds or so of DV video can easily be stored in a memory
    buffer and displayed after a delay.

    /Johan
     
    Johan Stäck, Oct 12, 2006
    #2
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  3. dug

    G Hardy Guest

    I was hoping that some of you may be able to give me some advice. I do
    If you're considering a laptop (or whatever) at the poolside, just get a
    £9.99 digital camera from SVP, with a matching 256MB SD card (I think they
    are about eight quid). Record at CIF resolution and put it into your editing
    program to analyse the changeover. Using a media card means that you're not
    generating a safety hazard with trailing wires. If you buy a ruggedised
    tablet PC you can use it at the pool's edge.
     
    G Hardy, Oct 12, 2006
    #3
  4. dug

    dug Guest

    Just one.
    Frame by frame.
    Interesting idea, but I think it will have to be manual.

    Thank you

    Douglas
     
    dug, Oct 12, 2006
    #4
  5. dug

    G Hardy Guest

    ...If you buy a ruggedised tablet PC you can use it at the pool's edge.

    Forgot to say - you can get a suitable one on eBay for £100
     
    G Hardy, Oct 12, 2006
    #5
  6. dug

    Johan Stäck Guest

    dug skrev:
    A cheap camera of the "web-cam" variety might well give you 10 fps.
    However these cameras tend to use long shutter times, and each frame
    when observed individually will be very blurred, maybe not revealing the
    detail you need.

    A DV camera on the other hand lets you set a short shutter time.
    Some of them have only a "sports mode", but some let you set the shutter
    time in detail.
    Also, when processed by "deinterlace" you will actually be able to
    extract 50 fps from a DV camera (even 60 with NTSC).

    But I don't know to much about swimming (I *do* swim...), so maybe a
    quick/simple and cheap solution will suffice!

    If not, let me know!

    /Johan
     
    Johan Stäck, Oct 13, 2006
    #6
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