How to make image sequence from video or images?

I want to make image sequence(.mat) file like (width x height x framerate unit8)

However, I followed the web page describing video to image sequences, it converted to (width x height x 3). https://kr.mathworks.com/help/matlab/examples/convert-between-image-sequences-and-video.html

How can I make image sequence like the attachment file.

Answer 1

[Von Duesenberg]

A quick look tells me that Alpaca probably contains 55 grayscale images whereas img is a color image with 3 channels corresponding to RGB. So if you want to stack color images, you need a 4-D array:

newArray = zeros(size(img,1), size(img,2), size(img,3), nbIm, 'uint8')

where nbIm if the number of images. Then:

newArray(:,:,:,idx) = img

for idx from 1 to nbIm.