Motion Capture Pre-capture duration

tdenson
tdenson
in SecuritySpy

I have got this set to 0 seconds but I still get about a 6 second pause before I see any motion on the recording.

Comments

  • Ben
    Ben

    This is most likely due to the camera's I-frame interval setting. Compressed H.264/H.265 video streams comprise sequential GOV (Group Of Video) segments, each of which lead with a single I-frame (encoding the full image) followed by multiple P-frames (encoding only changes in the image. Decoding must always start at the I-frame to avoid image corruption. So, when Motion Capture is triggered, SecuritySpy has to go back and start recording from the last I-frame, which could be several seconds in the past.

    If you want to shorten this period, check the camera's video encoding settings and look for a setting called "I-frame interval", "key frame rate", or "GOV length". If specified in frames, enter a value of around 2-3x the frame rate. If specified in seconds, enter a value of 2-3s or so.

  • tdenson
    tdenson

    Thanks I'll try that

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