snapFrames = [3, 27, 51]; %indices of required snap frames

vdoReadObj = VideoReader('xylophone.mp4');

i = 0;

j = 0;

% % read video frame by frame

% % Snapped frames are saved in structure imageStru

while hasFrame(vdoReadObj)

vidFrame = readFrame(vdoReadObj);

i = i + 1;

if ( find(snapFrames==i) > 0 )

j = j+ 1;

imageStru(j).image = vidFrame;

end

end

% % Show snapped frames one by one in separate figures

for k = 1:length(imageStru)

figure

imshow(imageStru(k).image);

end

Create a cell array to store the frame and use the sprintf function to not overwrite the frames acquired. this is an example

vid = videoinput('winvideo',1); set(vid, 'FramesPerTrigger', Inf); set(vid, 'ReturnedColorspace', 'rgb'); i = 1; while true data{i} = getsnapshot(vid); imwrite(data{i}, sprintf('imageName%d.jpg',i))%save in the current folder imshow(data{i}); i=i+1; pause(5); end