hello Andrew
see this code demo to read the video , extratct each frame then crop the unwanted borders and save back to a video output file
% Create a VideoReader object for the (input) MP4 file
videoFile = '09-09-25 Exp100100.mp4 ';
videoObj = VideoReader(videoFile);
% Display video properties
disp(videoObj);
% Create a VideoWriter object for the output video file and open the object for writing.
v = VideoWriter("output_video.mp4");
open(v)
% define grid size (output frame size)
mt = 100;
nt = 100;
% Read , display , crop and save frames
while hasFrame(videoObj)
frame = readFrame(videoObj); % Read the next frame
% % display (optionnal)
% imshow(frame); % Display the frame
% pause(1/videoObj.FrameRate); % Pause to match the video frame rate
% crop frame
[m,n,p] = size(frame);
delta_m = floor((m-mt)/2);
delta_n = floor((n-nt)/2);
frame_out = frame(delta_m:m-delta_m-1,delta_n:n-delta_n-1,:);
% write video
writeVideo(v,frame_out);
end
% Close the VideoWriter object.
close(v)
