This code runs on other computers but when I run on win7 32 bit operating system the code It does not works and give error Warning: Unable to determine the number of frames in this file.

x=VideoReader('clip.mp4');
for img = 1:x.NumberOfFrames
     filename = strcat('frame',num2str(img),'.jpg');
     b = read(x, img);
     b=rgb2gray(b);
     imwrite(b,filename);
end

[Rik]

What releases are you comparing?

[Muhammad Khan]

what do you mean by releases. I need frames from a video. This code runs on other computers why not on mine I also install windows 7 codec. but I do not have windows media features for 32bit system. Is this the issue.

[Ameer Hamza]

By release, Rik meant which MATLAB version are you using e.g. R2018a is the latest version.

[OCDER]

Are you able to view the mp4 file using another program like windows media player? If not, it could be a 64bit vs 32bit codec issue as discussed here:

https://www.mathworks.com/help/matlab/import_export/supported-video-file-formats.html

[Image Analyst]

Attach the clip here if it's not too big, or on some third party web site if it's too big to attach here.

What operating systems are the "other computers" running?

[Muhammad Khan]

Other computer is 64 bit operating system I am running on 32 bit operating system. This might be the reason. Should I install 64 bit operating system

[Image Analyst]

I'd doubt that is the reason, but who knows - we've all seen some bizarre things before. If you can, a 64 bit OS is better overall if your hardware can handle it.

[Muhammad Khan]

Ok