movie resolution using getframe

hello.

I have a problem for generate a HD resolution movie (1920x1200) but as the computer monitor do not have HD resolution i cant using getframe function because each frame is the size of window plot (max resolution of computer monitor (1680x1050) and not as defined. for exemplo:

scrsz = get(0,'ScreenSize'); %getting the screensize of the 1 screen

figure('Position',[1 0 1920 1200],'MenuBar','none','ToolBar','none','resize','off') % fullscreen

% Prepare the new file.

vidObj = VideoWriter('peaks.avi');

open(vidObj);

% Create an animation.

Z = peaks; image(Z); 

axis tight

set(gca, 'CLim',[0,1],'position',[0 0 1 1],'Visible','off')

for k = 1:20 

imagesc(sin(2*pi*k/20)*Z),colormap jet

     % Write each frame to the file.

currFrame = getframe;

   writeVideo(vidObj,currFrame);

end

% Close the file.

close(vidObj);

So, the generated movie peaks.avi have a resolution of computer monitor and not (1920x1200).

what i do? exist other way to generate a movie without need plot a figure (using getframe)?

thank...

Answer 1

[Image Analyst]

Notice the third option for writeVideo:

writeVideo(writerObj,img) writes data from an image to a video file.

So create an image and then display the hi-res ( not HD because HD is only 1080 lines tall) image, and then call writeVideo(). I haven't tried it but it claims that it will write out the image, which can be any resolution, as opposed to currFrame which can only be as large as your monitor.

[TVieira]

thanks but don't works. in the same way, is necessary plot a image to add a video frame and this plot is limited by monitor resolution.

I need a way to generate a video frame directly of a variavel(.mat or N x M x L matrix... whatever) without need plot a image.

any way thanks.