How do I save multiple frames from a video?

I am trying to extract 10 frames from any video (evenly spaced time intervals throughout its duration). It is only saving one photo (the very first frame). How do I get all 10 frames and save them? I was hoping my third to last line would solve the problem, but it did not. It saves directly to my matlab folder, and I am not too worried about that part.

%Pick desired video file
startingFolder = pwd;  % or 'C:\wherever';
if ~exist(startingFolder, 'dir')
	% If that folder doesn't exist, just start in the current folder.
	startingFolder = pwd;
end
defaultFileName = fullfile(startingFolder, '*.*');
[baseFileName, folder] = uigetfile(defaultFileName, 'Select a file');
if baseFileName == 0
	% User clicked the Cancel button.
	return;
end
fullFileName = fullfile(folder, baseFileName); % holds chosen video file
obj = VideoReader(fullFileName);
frameReader = readFrame(obj);
get(obj)

% read the total number of frames

numFrames = ceil(obj.FrameRate*obj.Duration); %maybe subtract 1, may not be necessary here
   
% file format of the frames to be saved in
ST ='.jpg';
    
% reading and writing the frames 
vid = readFrame(obj);
for x = 1 : obj.Duration/10 : numFrames
    imwrite(vid(:,:,:,x),strcat('ChosenFrame-',num2str(x),'.jpg'));
end

Answer 1

[Mili Goyal]

I think the readFrame outside the for loop could be the problem. Try placing it inside the for loop. Refer to the following MATLAB Answer for better clarification.

https://www.mathworks.com/matlabcentral/answers/333532-how-to-extract-and-save-frames-in-a-video

[Kiersten Horton]

I tried doing that, and I am still having the same problem.

[Mili Goyal]

What exactly is the issue that you are facing now?