9/27/2023 0 Comments Banding camTry reseating the cable at each end (power off). If a signal that changes each frame is influencing another signal it could possibly affect the supply to the camera or timing of something. Try another adaptor.Īnother possibility is a partial short or poor contact on the FFC cable. You should first verify that you are filming in 60/30/24 fps in regions whose power grid uses a 60 Hz frequency, or in 25/50 fps for 50 Hz. You may find that a slightly higher voltage on the PI board will cure the issue. You seem to have a flickering light source that is out of sync with the camera's rolling shutter. The bands don't move so the source must be synchronised to the frame rate of the camera. If the source is not synchronised the bands will move. There won't be anything on the Pi synchronised to mains frequency. I think, if it is power related, it must be due to extra power load each time the sensor cycle begins. Given that they didn't move it is unlikely to be mains ripple or any sort of radiated interference. It's good new that you have got rid of the bands. Now I need to sort out some cleaner power that does not rely on batteries. I've now run the pi using a battery pack and the bands have gone. You are correct! After determining that there is no way that it could be the power it turned out to be the power. Burngate wrote:My camera hasn't yet arrived (tomorrow? Tuesday?) but what you describe sounds suspiciously like Mains ripple - twice in the mains cycle the 5v is dipping, and that will occur at the same place in the camera frame.
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