error using imwrite which gives Can't open file "1.jpg" for writing. You may not have write permission.

my program is as follows

clc; close all; clear all;

   myVid= VideoReader('BS.avi');
   numFrames= myVid.NumberOfFrames;
   i= 1;

   while i<=numFrames
   currentFrame= read(myVid,i); 
   combinedString=strcat(int2str(i),'.jpg');

   imwrite(currentFrame,combinedString);
   i=i+1;
   end

[Geoff Hayes]

You will need to verify that you have permissions to write files to the current directory. Just prior to running your program, type the following in the Command Window

 fileattrib

What does the UserWrite field show?

Answer 1

[Image Analyst]

What folder does it say when you issue this command just before your loop"

pwd

It looks like you want to extract all the frames of a video into separate image files. That is exactly what my attached demo do. Simply change the file name and use it. The second half rebuilds a video from the separate frames. You can remove that part if you want.