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Reading in an Entire Video
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I would like to read in an entire video as a matrix if possible. I know this runs into the memory usage problem. My main concern is that I would like to analyze the video frame by frame, in a faster manner than literally looping through the data. Ideally, I could plot the data from a region of interst to see if there has been a change in that region at any point during the video. I am currently using the CurrentTime function from the VideoReader class to just check in intervals. I also tried using memmapfile but I do not really understand how the function works.
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KSSV
2019 年 5 月 21 日
vidObj = VideoReader('C:\Users\Public\Videos\Sample Videos\Wildlife.wmv');
numFrames = 0;
iwant = cell([],1) ;
while hasFrame(vidObj)
F = readFrame(vidObj);
numFrames = numFrames + 1;
imagesc(F)
drawnow
iwant{numFrames} = F ;
end
numFrames
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