how to extract frames from a video on matlab in matlab

To extract frames from a video on Matlab, you can use the VideoReader function to read the video, and the imread function to extract the frames. Here's a sample code that shows how to extract every 5th frame from the video:

main.m
% Open the video file
video = VideoReader('myvideo.mp4');
% Define the frame rate (frames per second)
frameRate = video.FrameRate;
% Define a counter to keep track of the frames
frameCounter = 0;
% Loop through all the frames
while hasFrame(video)
    % Read the next frame
    frame = readFrame(video);
    % Increment the counter
    frameCounter = frameCounter + 1;
    % Check if the frame is a multiple of 5
    if mod(frameCounter,5) == 0
        % Save the frame as an image file
        imwrite(frame,sprintf('frame%d.jpg',frameCounter));
    end
end
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In this code, we first open the video file using the VideoReader function. We then define the frame rate of the video and a counter to keep track of the frames. We then loop through all the frames using the hasFrame function, and for each frame, we increment the counter and check if the frame number is a multiple of 5 using the mod function. If it is, we save the frame as an image file using the imwrite function.