I am trying to extract frames from a video and I have the following code.As I run the code the folder does not show the extracted frames and I don't know why?

I have the following code.It does not give any error but the folder that is supposed to hold all the extracted frames does not show any frames.Why?

videoObject=VideoReader('clouds.mp4');

  % Determine how many frames are there .

  numberOfFrames = videoObject.NumberOfFrames;

  vidHeight = videoObject.Height;

  vidWidth = videoObject.Width;

      % Ask user if they want to write the individual frames out to disk.
    promptMessage = sprintf('Do you want to save the individual frames out to individual disk files?');
    button = questdlg(promptMessage, 'Save individual frames?', 'Yes', 'No', 'Yes');
    if strcmp(button, 'Yes')
      writeToDisk=true;
      
      % Extract out the various parts of the filename.
      [folder, baseFileName, extentions] = fileparts('clouds.mp4');
      % Make up a special new output subfolder for all the separate
      % movie frames that we're going to extract and save to disk.
      folder = pwd;   % Make it a subfolder of the folder where this m-file lives.
      outputFolder = sprintf('%s/Movie Frames from %s', folder, baseFileName);
      % Create the folder if it doesn't exist already.
      if ~exist(outputFolder, 'dir')
        mkdir(outputFolder);
      end
    else
      writeToDisk = false;
      end
      % Loop through the movie, writing all frames out.
    % Each frame will be in a separate file with unique name.
    meanGrayLevels = zeros(numberOfFrames, 1);
    meanRedLevels = zeros(numberOfFrames, 1);
    meanGreenLevels = zeros(numberOfFrames, 1);
    meanBlueLevels = zeros(numberOfFrames, 1);
    for frame = 1 : numberOfFrames

    % Extract the frame from the movie structure.

    thisFrame = read(videoObject, frame);

    
    % Display it

    hImage = subplot(2, 2, 1);

    image(thisFrame);

    caption = sprintf('Frame %4d of %d.', frame, numberOfFrames);

    title(FRAMES, 'FontSize', 10);

    drawnow; % Force it to refresh the window.

      end

Answer 1

[Walter Roberson]

Your code does not write anything to disk, other creating the folder. You display the frames but you do not imwrite() them to disk.

[Prachi Sharma]

Ok,I am going to try that.

[Prachi Sharma]

Thanks it worked :)