"BR" <slac***@nonsensecomcast.net> wrote in message
news:Xns9678853B08B26slackinnonsensecomca@216.196.97.136...
> Hello,
>
> I am not familiar with the technology, and am finding it difficult to
> determine what type of camera and hardware to use without spending
> thousands.
>
> I'm conducting an experiment which requires video of a result. I bought a
> JVC GR-D30 camcorder but it later failed and is out of warranty. There is
> no image. Only playback and menus are visible thru the composite output.
> While the camera was working, I tried it out and tranferred the video via
> DV output to my laptop. The results were satisfactory. But then I
> realized that tape would be expensive and unreliable if the experiment
> were to be conducted 100s of times (maybe even 1000s) and I can't afford
> to miss a rare event.  An Osprey 100 card and an additional 120GB HD was
> installed in a desktop system with the composite output of the JVC
> connected to it.  640x480 grayscale uncompressed at 30fps was sufficient.
> But I don't like seeing double images in a single frame when viewing the
> AVI file, making it harder to take velocity data.
>
> Is there any relatively low cost setup, like a video camera (not
> camcorder) with DV output that will allow continous 30fps (or perhaps
> 60fps for 2x slow mo) recording to a HD? Or perhaps a security camera
> with genlock (if that's the correct terminology), so that each frame of
> the AVI file is synchronized with the camera shutter? Or is there a
> capture card that synchronizes with the composite output, where the card
> slaves to the camera?

>
>
> Ben
>
> --

"PTravel" <ptra***@ruyitang.com> wrote in
news:3hgr0hFh2i49U1@individual.net:

>
> "BR" <slac***@nonsensecomcast.net> wrote in message
> news:Xns9678853B08B26slackinnonsensecomca@216.196.97.136...
>> Hello,
>>
>> I am not familiar with the technology, and am finding it difficult to
>> determine what type of camera and hardware to use without spending
>> thousands.
>>
>> I'm conducting an experiment which requires video of a result. I
>> bought a JVC GR-D30 camcorder but it later failed and is out of
>> warranty. There is no image. Only playback and menus are visible thru
>> the composite output. While the camera was working, I tried it out
>> and tranferred the video via DV output to my laptop. The results were
>> satisfactory. But then I realized that tape would be expensive and
>> unreliable if the experiment were to be conducted 100s of times
>> (maybe even 1000s) and I can't afford to miss a rare event.  An
>> Osprey 100 card and an additional 120GB HD was installed in a desktop
>> system with the composite output of the JVC connected to it.  640x480
>> grayscale uncompressed at 30fps was sufficient. But I don't like
>> seeing double images in a single frame when viewing the AVI file,
>> making it harder to take velocity data.
>>
>> Is there any relatively low cost setup, like a video camera (not
>> camcorder) with DV output that will allow continous 30fps (or perhaps
>> 60fps for 2x slow mo) recording to a HD? Or perhaps a security camera
>> with genlock (if that's the correct terminology), so that each frame
>> of the AVI file is synchronized with the camera shutter? Or is there
>> a capture card that synchronizes with the composite output, where the
>> card slaves to the camera?
>
> Most any miniDV or D8 camcorder will output DV-25 (720 x 480 for NTSC
> at 29.97 fps) over OHCI-compliant 1394/Firewire.  Then it's just a
> question of connecting it to a computer.  I can capture video from
> both of my miniDV machines to my laptop's hard drive without any
> problem using Scenealyzer Live, a very inexpensive capture program.
>
> Is that what you're trying to do?
>

Ï "BR" <slac***@nonsensecomcast.net> Ýãñáøå óôï ìÞíõìá
news:Xns9678AC4316E1Cslackinnonsensecomca@216.196.97.136...
> "PTravel" <ptra***@ruyitang.com> wrote in
> news:3hgr0hFh2i49U1@individual.net:
>
> >
> > "BR" <slac***@nonsensecomcast.net> wrote in message
> > news:Xns9678853B08B26slackinnonsensecomca@216.196.97.136...
> >> Hello,
> >>
> >> I am not familiar with the technology, and am finding it difficult to
> >> determine what type of camera and hardware to use without spending
> >> thousands.
> >>
> >> I'm conducting an experiment which requires video of a result. I
> >> bought a JVC GR-D30 camcorder but it later failed and is out of
> >> warranty. There is no image. Only playback and menus are visible thru
> >> the composite output. While the camera was working, I tried it out
> >> and tranferred the video via DV output to my laptop. The results were
> >> satisfactory. But then I realized that tape would be expensive and
> >> unreliable if the experiment were to be conducted 100s of times
> >> (maybe even 1000s) and I can't afford to miss a rare event.  An
> >> Osprey 100 card and an additional 120GB HD was installed in a desktop
> >> system with the composite output of the JVC connected to it.  640x480
> >> grayscale uncompressed at 30fps was sufficient. But I don't like
> >> seeing double images in a single frame when viewing the AVI file,
> >> making it harder to take velocity data.
> >>
> >> Is there any relatively low cost setup, like a video camera (not
> >> camcorder) with DV output that will allow continous 30fps (or perhaps
> >> 60fps for 2x slow mo) recording to a HD? Or perhaps a security camera
> >> with genlock (if that's the correct terminology), so that each frame
> >> of the AVI file is synchronized with the camera shutter? Or is there
> >> a capture card that synchronizes with the composite output, where the
> >> card slaves to the camera?
> >
> > Most any miniDV or D8 camcorder will output DV-25 (720 x 480 for NTSC
> > at 29.97 fps) over OHCI-compliant 1394/Firewire.  Then it's just a
> > question of connecting it to a computer.  I can capture video from
> > both of my miniDV machines to my laptop's hard drive without any
> > problem using Scenealyzer Live, a very inexpensive capture program.
> >
> > Is that what you're trying to do?
> >
>
> Yes, except my low end (now defunct) JVC GR-D30 will output DV thru
> firewire in playback mode only. It cannot be used as a "video camera"
> except with the composite output. I wished the Osprey 100 could slave to
> the composite signal, though I don't know if this is even technically
> feasible. Is there a card capable of doing this? Will it have to cost a
> $1000?
>
> A CS or C mount video camera (not a camcorder, not even with a viewfinder
> or LCD monitor) with DV output and manual everything would do the trick.
> There should exist something reasonably priced in 640x480 or 720x480 that
> is used for imaging in motion control, or other fixed applications. It
> doesn't need a super high speed shutter or ultra low lux.
>
> Although not entirely satisfied, I have already ordered a Sony security
> type video camera w/composite output and prime lens (about $250 total).
> The Sony is b&w with 768x494 CCD, a slightly odd format that's about
> 1.55:1 ratio, but should work with the capture card set at 720x480.
>
> Since the camera and lens are on order, the solution is a capture card
> that can slave to a composite signal without taking an arm. If not, then
> I'll just have to consider a DV video camera some other time. I haven't
> Googled enough.
>
>
> Ben
>
> --
>
>
>
>
>
>
>
>
>

"Dimitrios Tzortzakakis" <dimtz***@otenet.gr> wrote in
news:d9136s$4l9$1@usenet.otenet.gr:

> Asking for a digital (DV) camera makes matters complicated, because
> all CCD and CMOS sensors, even our eyes, are analogue, and your camera
> needs extra hardware to convert to digital.The traditional way of
> doing this is with an analog video camera and a time lapse VCR, I
> don't know if you still can get these in USA, or what are their
> nowadays equivalents.
>
> --
> Tzortzakakis Dimitrios
> major in electrical engineering, freelance electrician
> FH von Iraklion-Kreta, freiberuflicher Elektriker