mp4 format video converted to avi format video wont load in matlab using mmreader()

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Ayesha ayub am 2 Sep. 2014

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https://de.mathworks.com/matlabcentral/answers/153206-mp4-format-video-converted-to-avi-format-video-wont-load-in-matlab-using-mmreader

Kommentiert: Geoff Hayes am 3 Sep. 2014

i have converted an mp4 format video to avi format but loading it using mmreader() command gives the following error:

_ _ _ _ * ??? Initialization failed. (No combination of intermediate filters could be found to make the connection.)

Error in ==> mmreader.mmreader>mmreader.init at 364 obj.MMReaderImpl = audiovideo.mmreader(fullName);

Error in ==> mmreader.mmreader>mmreader.mmreader at 133 obj.init(fileName);

Error in ==> test1 at 5 video = mmreader('sample.avi');* _ _ _ _

can any one help me i don't understand the error my code is as following:

clear all

threshold= 15;

video = mmreader('sample.avi');

first_frame = video.read(1) ;

 first_frame_gray=rgb2gray(first_frame);
 total_frames= video.NumberOfFrames;
 [row,column,page]=size(first_frame);
 dummy_matrix = zeros(row,column);
for i=2:total_frames
    current_frame=video.read(i);
     current_frame_gray=rgb2gray(current_frame);
     frame_difference=abs(double(current_frame_gray)-double(first_frame_gray));
    for nr=1:row                 
        for nc=1:column
            if ((frame_difference(nr,nc) > threshold))          % if fr_diff > thresh then that pixel is in foreground
                dummy_matrix(nr,nc) = frame_difference(nr,nc);
            else
                dummy_matrix(nr,nc) = 0;   %if fr_diff < thresh then that pixel is black
            end
        end
    end
    first_frame_gray=  current_frame_gray;
    figure(1),subplot(2,1,1)
    imshow(current_frame)
    subplot(2,1,2)
    imshow(uint8(dummy_matrix))
    Movie(i-1)  = im2frame(uint8(dummy_matrix),gray);           % put frames into movie. i-1 cause it starts from 2
end