How can I acquire frames from a live video stream, acquire the frames, then use the frames to recreate the live video stream?

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Shinobu
Shinobu 2016-12-7
回答： Jiro Doke 2016-12-9

Hello. I want to detect red objects from the live video stream (I know how to detect red objects)

What I want to know is how to acquire the frames from the original live video stream and recreate another live video stream using the processed frames and play these two video streams side by side.

Please help. I'd be really grateful to you.

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Image Analyst
Image Analyst 2016-12-8
Use getsnapshot()
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Jiro Doke
Jiro Doke 2016-12-9
One such example.
v = VideoReader('xylophone.mp4');
% Display first frame
firstFrame = readFrame(v);
subplot(1,2,1)
h1 = imshow(firstFrame);
subplot(1,2,2)
h2 = imshow(rgb2gray(firstFrame));
% Loop through all frames
while hasFrame(v)
frame = readFrame(v);
frameG = rgb2gray(frame);
% Update image
h1.CData = frame;
h2.CData = frameG;
drawnow
end

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