MATLAB: Do I get a “Movie cdata must be of type uint8 array” error when I use the MOVIE command with a 16-bit grayscale AVI in MATLAB R14

addframeMATLAB

I have a 16-bit grayscale AVI, filename.avi, as verified with the AVIINFO function, which returns the following info:

 ImageType: 'grayscale'

I then enter the following commands:

move=aviread('filename.avi');
movie(mov)

and I obtain the following error:

 ??? Error using ==> movie
 Movie cdata must be of type uint8 array.

Best Answer

This bug has been fixed in Release 2007b (R2007b). For previous product releases, read below for any possible workarounds:

The MOVIE function does not accept movie objects that have the CDATA field of type UINT16.

As a workaround on a Windows machine, use the following command to view a movie, in the default AVI player:

winopen('filename.avi')

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The proper way to add frames to a movie is as described in the documentation, to add frames to the avifile by using the GETFRAME function as shown in the code below:

mov = avifile('pd3.avi'); 
figure 
surf(peaks)
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frame = getframe(gcf);
mov = addframe(mov,frame); 
mov = close(mov);

Note that MATLAB graphics objects must be displayed on screen because the GETFRAME function, which is used to produce frames for the movie structure, performs a screen capture to acquire the necessary image data for the frames.

Best Answer

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