Picture and Video have "trailing pixels"
  • Has anyone ever seen this before and have an appropriate name for the problem? I'm calling it "trailing pixels." It's occurring with only one of my Dahua cameras. Trying to figure out if this is a common problem and if anyone has a solution. I've tried to play with the settings, specifically the frame rate, to no avail. The camera is a Dahua IPC-HFW4300S 3MP IR. I've attached a still shot and a brief movie.

    https://www.dropbox.com/s/r6246dxc48eon47/08-24-2015 16-46-26 Driveway.jpg?dl=0

    https://www.dropbox.com/s/dmb9e1tlanf4q2g/08-24-2015 16-46-25 MD Driveway.mov?dl=0
  • It looks like some H.264 data is getting lost, causing video corruption. The first thing to do is to check for new firmware for your Dahua camera and install it on your camera.

    If you are using the ONVIF profile, make sure to use the TCP format option rather than the UDP format option (the former being more reliable). Or, simply use the Dahua profile as this uses TCP. These settings are all in the Video Device Settings window in SecuritySpy.

    Try setting the camera to VBR (Variable Bit Rate) encoding rather than CBR (Constant Bit Rate) encoding. This should allow it to better cope with visual changes in the scene such as a car driving past.

    Finally, check your network. Is the connection between the camera and the Mac a fast wired ethernet connection, using a reliable switch (e.g. Netgear)?

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