MATLAB: Frame must be 0 by 0 error during movie2avi

gerframe movie2avi error frame movie

Hi, im trying to make avi file using getframe. Ive done a lot of movies but now it crashed. Matlab says:

Error using avifile/addframe>ValidateFrame (line 288)
Frame must be 0 by 0.
Error in avifile/addframe (line 158)
      ValidateFrame(aviobj,width, height,dims);
Error in movie2avi (line 64)
avimov = addframe(avimov,mov);
Error in movie>save_pushbutton_Callback (line 107)
movie2avi(handles.F, 'test1211.avi','fps',3);
Error in gui_mainfcn (line 96)
        feval(varargin{:});
Error in movie (line 16)
    gui_mainfcn(gui_State, varargin{:});
Error in @(hObject,eventdata)movie('save_pushbutton_Callback',hObject,eventdata,guidata(hObject))

Do you know what this error means? Thanks!!

Best Answer

All frames in an AVI file must have the same size. When the first frame was created with the size [0 x 0], all other frames must have the same size also. But obviously this is not intented and there is a bug for the first frame already.

Related Solutions

MATLAB: Display 2 different video in same GUI

Su - I don't think that you will be able to play two videos concurrently using the movie function. I suspect that it blocks so that once it is called with

 movie(hf, mov, 1, Obj.FrameRate);

the subsequent line of code won't fire until this first video completes playback.

As for the error message, it is unclear what may be invalid with handles.axes2. Has this been defined correctly? Does this axes exist within your GUI?

I think what you might want to do is to not use the movie function and display the frames yourself. See http://www.mathworks.com/matlabcentral/answers/216698-how-to-play-my-video-while-my-graph-animates for an example on how you may do this.

If the frame rate for both videos is identical, then you can use one for loop to display each frame for each video (of course, you would have to handle the case where one video is longer (has more frames) than the other).

If the frame rate for each video is different, then your code will have to become smarter. The easiest (?) thing to do maybe to create two timers whose rate is the inverse frame rate for each video. When each timer fires (at different rates) it will display the subsequent frame of the video. So you will need to keep track of the last frame displayed for each video.

MATLAB: Does “getframe” capture frames with different sizes when the Camera properties have been modified in MATLAB R2014a

When the Camera properties change, the dimensions of the axes in which the 3D plot is rendered change slightly. By default, the "getframe" function captures the current axes and, therefore, not all frames will have the same size. Then, the "movie2avi" function throws an error because a movie file can only be created if all frames have the same size.

The "getframe" function can be used to capture the entire figure, instead of only capturing the axes. Using "getframe" with a figure handle ensures that all frames have the same size. In addition, the title of the plot and eventual other elements in the figure will be also included in the movie.

The following piece of code uses the "getframe" function on the handle to the figure containing the 3D plot. Also, note that it is recommended to use "VideoWriter" instead of "movie2avi." "VideoWriter" is faster and more reliable. Finally, if you are using MATLAB R2014a or earlier, the renderer should be set to Z-Buffer to avoid a bug in OpenGL that affects MATLAB R2014a and earlier versions.

% Create a VideoWriter object
writerObj = VideoWriter('movie.avi');
open(writerObj);
% Create a new figure
f = figure;
% Set a size if desired
width = 800;
height = 600;
set(f,'Position',[15 15 width height])
% Change the renderer to avoid bugs due to OpenGL
set(f,'Renderer','ZBuffer')
% Draw a sphere
sphere
% Make the current axis box square in size
axis('square')
% Define title and labels for reference
title('Rotation of a sphere...')
xlabel('x')
ylabel('y')
zlabel('z')
% Modify azimuth (horizontal rotation) and update drawing
for az = -50 : .2 : 30
    view(az, 40)
    % Capture the entire figure window

    frame = getframe(f);
    writeVideo(writerObj,frame);
end
% Modify elevation (vertical rotation) and update drawing
for el = 40 : -.2 : -30
    view(30, el)
    % Capture the entire figure window
    frame = getframe(f);
    writeVideo(writerObj,frame);
end
% Finish creating the AVI file
close(writerObj);

Best Answer

Related Solutions

MATLAB: Display 2 different video in same GUI

MATLAB: Does “getframe” capture frames with different sizes when the Camera properties have been modified in MATLAB R2014a

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