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2015-08-14 23:19:07 -0500 asked a question how do you measure the time delay of two consecutive frames in a live videostream

Hi guys, I am trying to determine the delay of two consecutive video frames from a webcam/videocam. the idea is, when a certain object passes by my camera, I need to determine how long the object stays in the camera's field of vision. I detect the said object and the number of frames it has stayed inside cameras vision. What I want to do is measure the real-time delay between two consecutive frames. In doing so, i can add up the time delays based on the number of frames the object is present.

Please help. btw, feel free to suggest another method in obtaining time. that is my ultimate objective anyway