extracting certain frames from a video in matlab

To extract certain frames from a video in Matlab, you can use the VideoReader function to read the video and loop over the desired frames indices to extract. Here is an example code snippet that extracts the first 10 frames of a video:

main.m
% Create a VideoReader object
vid = VideoReader('my_video_file.mp4');

% Preallocate a cell array to store the frames
numFrames = 10;
frames = cell(1, numFrames);

% Loop over the desired frames indices
for i = 1:numFrames
    % Read the next frame
    frame = read(vid, i);
    
    % Store the frame in the cell array
    frames{i} = frame;
end
347 chars
16 lines

In this example, the VideoReader function is used to read the 'my_video_file.mp4' video file. The loop extracts the first 10 frames of the video using the read function, which takes the frame index as a second argument. The extracted frames are stored in a cell array called 'frames'.

Note that you can modify the frame indices processing depending on your specific needs, and save the output as images or process the frames in other ways.