Suppose I have two identical cameras, a red camera and a blue camera, that can both shoot videos at 1000 frames per second. If I set them up in the following set up, using a half-silvered mirror to capture the object highlighted in green, could I not technically achieve 2000 frames per second by simply overlapping the two sets of data I get from the red and the blue cameras? (e.g., take the first frame from the red camera, the second frame from the blue camera, and so on?) In effect I could double the frames per second of any camera with correct timing with the following set-up, though I've personally never touched a camera so I don't know the limitations that cameras could impose on realizing this dream of mine. I'm not too sure if this is off-topic either, sorry if it is.


  • Sounds like a good idea. Triggering the cameras at the right interval might involve some custom electronics or software, and making the two images register perfectly might be tricky, but the rest would be relatively simple.
    – stib
    Aug 15, 2015 at 13:09

1 Answer 1


You could get twice the frame rate if (big if) the taking times of the cameras were shifted by 1/2 millisec. In other words, the frame R1 is time stamped 0.0010 sec and the frame B1 is time stamped 0.0015 sec, and so on. Sync would have to be centrally driven, and registration would have to be perfect.

That leads to the problem that the frames from camera B would be horizontally reversed WRT the frames from camera R. This could be overcome, just something to consider when trying to register the images.

  • I think the biggest issue is the time sync. Cameras that operate at 1000 frames/second might have just enough jitter such that there wouldn't be a smooth blend between camera A & B footage. Besides, at that rate, why not use interpolation software? Cheaper than a second camera, though of course you're not actually creating 2000 frames/second in camera.
    – WineSoaked
    Aug 15, 2015 at 20:02
  • 1
    @WineSoaked - Right, if the idea is to get better time resolution, interpolation wouldn't really help.
    – Jim Mack
    Aug 15, 2015 at 21:51

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