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Thread: Need Help! Trying to figure out how this camera works!

  1. #1
    Who am I? HiJackZX1's Avatar
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    Need Help! Trying to figure out how this camera works!

    Im trying to hack a secondary camera that connects to my black box recorder. i wanted to use my DQP in place of the camera so I can add 4 more cameras to the mix. I originally oredered the non IR version because it looked understandable. I guess they dont make it anymore because they sent me the new IR version. What I am not understanding are the power and video ground points.

    Here is the manual, camera, and plug.





    On the old version you had way more wires. On this new design they have got it down to three. What I dont understand is how does this work? Are the Video and 12V line sharing the same ground, or is it possible that I dont need to use a ground for the video side, or could it be the 12V side doesnt need ground since it draws its power direct from the black box, which is regulated?
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    FLAC SNOtwistR's Avatar
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    i would have to think they are using a common ground, being that they both need it to complete their circuits and the fact the ground is in the middle of the connections SNO

  3. #3
    Who am I? HiJackZX1's Avatar
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    Quote Originally Posted by SNOtwistR View Post
    i would have to think they are using a common ground, being that they both need it to complete their circuits and the fact the ground is in the middle of the connections SNO
    That was my logic. Similar to the way stereo headphone plugs are wired. The left and right have their own wires, but they both share the ground. Im just worried because i dont want to damage any thing, all though technically, I dont need the power side since the DQP is powered on its own. Only thing I guess Im worried about is if the Black Box needs to see that power is being accessed from that port in order to activate the second camera.
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    MySQL Error soundman98's Avatar
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    yup-- it is a shared ground.

    you should not affect anything by hooking it up the way you describe.

    without going back to the office to look, it appears to be a standard pinhole camera board cable, so there are millions of those cables that might be easier to hack then to use the cable it came with..

  5. #5
    Who am I? HiJackZX1's Avatar
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    Well thanks guys. For the DVR to activate the second camera port, it simply has to sense ground. So since video is going through the ground, it turns on and displays the 4 cameras.

    Here is the video I shot while going to BK, and to work. You guys finally get to see me!



    I also swapped out the inside camera with the one that I bought, that way I didnt feel like I wasted 100.00 for the camera.
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    Constant Bitrate
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    Why is the video so jerky? Is it because of 15FPS or did YouTube do some further compression causing this weird rubber-band effect? Is the motion fluid during 30FPS recording?

    Could you please post some snapshots of the camera mounts?

  7. #7
    Who am I? HiJackZX1's Avatar
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    Quote Originally Posted by DigitalVampire View Post
    Why is the video so jerky? Is it because of 15FPS or did YouTube do some further compression causing this weird rubber-band effect? Is the motion fluid during 30FPS recording?

    Could you please post some snapshots of the camera mounts?
    It says that in the manual that when the second camera is installed, the frame rate drops to 15 fps. It could also be because I am using that second camera port in a way it simply wasnt meant to be used in. It could also be the software I am using to join the two video feeds together (the unit doesnt do it natively). Basically the camera records to files. One for front (high quality) and one file for back (medium quality). I then use a software to combine the two feeds. I think maybe something is going on there and its causing jerkiness. i am going to have to play with it some more. The motion is flawless at 30 fps, scroll up and watch the video with no second camera. I put my money on the software not being able to handle two streams though.

    EDIT: I forgot this is a different post, the other footage isnt here, but it looks like you found it.
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    MySQL Error soundman98's Avatar
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    ahh! turn it off!! turn it off!!

    i am thinking it is the software encoding that is messing with the footage. assuming 15fps, you are getting about 5-10 frames before it hesitates for a frame or two, and then continues. it is still really good quality, and even with the slight hesitation, is very clear looking footage!(now i am just trying to make out what kind of car that is at 2:30-2:33 on the right side of the screen..)

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