I am not sure why you scaled the pixels from -1 to 1. The following code use pixel values from 0 to 1, and the inverse image have pixel values from 1 to 0.
im = im2double(imread('peacock.jpg'));
im_reverse = 1-im;
N = 10;
time = reshape(linspace(0, 1, N), 1, 1, 1, N);
frames = im_reverse.*time + im.*(1-time);
v = VideoWriter('video_file', 'MPEG-4');
v.FrameRate = 10;
open(v);
for i = 1:5 % how many times to repeat pattern
% im to im_reverse
for j=1:N
frame = frames(:,:,:,j);
writeVideo(v, frame);
end
% im_reverse to im
for j=N:-1:1
frame = frames(:,:,:,j);
writeVideo(v, frame);
end
end
close(v);
