MATLAB: Matlab source code for file selection

I am doing a project on Video Compression. My problem is that i have a folder named "Snaps" that contains all the frames of the video. I want to select a number of sequential files having a certain interval and save those files into another folder named "Newsnaps". Can anyone please help me with the source code on this matter??

Best Answer

Hi,

If I understood correctly you want to read the files from the folder Snaps, subsample them and then save them on a new folder called NewSpnas.

video_dir = 'snaps/'
extension = 'jpg'
out_dir = 'Newsnaps/'
step = 2 % this parameter decide which frames to save
resnames=dir(fullfile(video_dirs,['*.' extension]));
for i=1:step:length(resnames)
    img=imread(fullfile(video_dirs,resnames(i).name));
    imwrite(img, [out_dir resnames(i).name]);
end

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MATLAB: Please provide me a matlab source code for running number of files in a loop.

    video_dir = 'snaps/'
    extension = 'jpg'
    out_dir = 'video/'
   resnames=dir(fullfile(video_dirs,['*.' extension]));
   for i=1:length(resnames)
        img=imread(fullfile(video_dirs,resnames(i).name));
        %

        % whatever you want to do with your image
        %
        imwrite(img, [out_dir resnames(i).name]);
    end

MATLAB: Joining jpg files to make a video

I use MATLAB2012a, you can try if this function works for you. The input arguments are: the path to the images (vide_dir), extention of the images (extension), path and name of the video with extension (aviname), and the frame rate (fps)

For example: make_video('/home/user/myImages/','jpg','myvideo.avi',5)

function make_video(video_dirs,extension,aviname,fps)
      resnames=dir(fullfile(video_dirs,['*.' extension]));
      aviobj=VideoWriter(aviname);
      aviobj.FrameRate=fps;
      open(aviobj);
      for i=1:length(resnames)
          img=imread(fullfile(video_dirs,resnames(i).name));
          F=im2frame(img);
          if sum(F.cdata(:))==0
              error('black');
          end
          writeVideo(aviobj,F);
      end
      close(aviobj);
end

Best Answer

Related Solutions

MATLAB: Please provide me a matlab source code for running number of files in a loop.

MATLAB: Joining jpg files to make a video

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