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How to extract a single frame from video file at given light conditions?

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Markus Danielsson
Markus Danielsson on 27 Aug 2016
Closed: MATLAB Answer Bot on 20 Aug 2021
I need to write some code that automatically runs a video file and extracts one(!) frame from that file at a given moment (specific light conditions). When the frame is extracted I want the next clip to automatically start and repeat the process. Anyone knows of such a code?
Thanks.

Answers (1)

Natch Ruengsakulrach
Natch Ruengsakulrach on 31 Aug 2016
You may find the following pseudocode useful.
videoCell = {'a.mp4','b.mp4','c.mp4'};
for i = 1:numel(videoCell) % go through each video
v = VideoReader(videoCell{i});
while hasFrame(v) % read each frame
frame = readFrame(v);
if frameLightConditionMet(frame)
% Proceed to the next video once obtain a frame that meets
% specific light condition;
% Store that frame
break;
end
end
end

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