Save image in specific location (directory)

I am loading a video file, then saving indivdual frames as jpg images.

I ask the user of the script to locate and open the video file:

% Ask user to open video file
[baseFileName, folderName, FilterIndex] = uigetfile('*.*', 'Select Video File');
if ~isequal(baseFileName, 0)
    movieFullFileName = fullfile(folderName, baseFileName);
else
    return;
end

Once matlab does its thing, I want to be able to write an image to the same directory as the video file came from.

imwrite(frame,"frame.jpg") % + something to write in the proper place

Is this possible?

Answer 1

[Voss]

Specify the full path to write to:

imwrite(frame,fullfile(folderName,"frame.jpg"))

Of couse, if that line is located in a different function than the function that defines folderName (i.e., the function where uigetfile is called), then you'll need to store folderName as an app property (App Designer) or in the handles structure (GUIDE) or otherwise make folderName accessible where you need it.

[Bill White]

seems to work a treat - thanks a lot!

As an extention - is it possible to save a matlab figure rather than a single image?

For example, if I have a Figure of subplots of several frames; is it possible to automatically save that Figure (as one would do if they went to Save As from the Figure menu)

regards

[Voss]

You're welcome!

[Bill White]

sorry to bother you - but I added a caveat about saving an entire Figure (i.e. a subplot with titles etc). Is that possible?

[Voss]

Yes, see savefig:

https://www.mathworks.com/help/matlab/ref/savefig.html

[Bill White]

thanks again!

[Voss]

You're welcome!

On second thought, exportgraphics might be more like what you're after.

https://www.mathworks.com/help/matlab/ref/exportgraphics.html

[Bill White]

thanks!