Read frames from the mp4 file

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niranjan v
niranjan v 2019-10-18
filename = '01_original.mp4';
mov = VideoReader(filename);
opFolder = fullfile(cd, 'snaps');
if ~exist(opFolder, 'dir')
mkdir(opFolder);
end
numFrames =mov.NumberOfFrames;
numFramesWritten = 0;
for t = 1 : numFrames
currFrame = read(mov,t); %reading individual frames
opBaseFileName = sprintf('%3.3d.png', t);
opFullFileName = fullfile(opFolder, opBaseFileName);
imwrite(currFrame, opFullFileName, 'png');
progIndication = sprintf('Wrote frame %4d of %d.', t, numFrames);
disp(progIndication);
numFramesWritten = numFramesWritten + 1;
end %end of 'for' loop
progIndication = sprintf('Wrote %d frames to folder "%s"',numFramesWritten, opFolder);
disp(progIndication);
I just want to read frames from the mp4 file and try to storing in a snaps folder which im created.
it works fine for avi file. but when i reading the mp4 file i got the error
Error using imwrite (line 442)
Expected DATA to be nonempty.
Error in frames (line 13)
imwrite(currFrame, opFullFileName, 'png');

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