videoWriter videoReader disorts file on linux

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Tom Wright 2012-7-31

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链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/44960-videowriter-videoreader-disorts-file-on-linux

Matlab R2011a on Ubuntu with latest version of gstreamer 0.10

Basically my code uses videoReader to read in video frames then pads alternate lines of the video with a few pixels to improve the interlacing. I then write the new video out with videoWriter. The code seems to work perfectly under Windows however when I run it on my linux machine the output file is distorted. I have uploaded examples of input http://dl.dropbox.com/u/91060467/input.avi and output http://dl.dropbox.com/u/91060467/output.avi videos to dropbox. Code is reproduced below.

Thanks

if true
function paddingTest(filename,iPad)
  [pathstr, name, ext] = fileparts(filename);
  mov=VideoReader([pathstr filesep name ext]);
  nFrames=mov.NumberOfFrames;
  vidHeight=mov.Height;
  vidWidth=mov.Width;
    frame_in(vidHeight,vidWidth,3)=uint8(0);
    frame_out(mov.Height,mov.Width+iPad,3)=uint8(0);
    movie_out(1:mov.NumberOfFrames) = struct('cdata', frame_out,'colormap', []);
    for idx_frame=1:mov.NumberOfFrames
        frame_in=read(mov,idx_frame);
        frame_out(1:2:vidHeight,:,:)=[frame_in(1:2:vidHeight,:,:) uint8(zeros(vidHeight/2,iPad,3))];
        frame_out(2:2:vidHeight,:,:)=[uint8(zeros(vidHeight/2,iPad,3)) frame_in(2:2:vidHeight,:,:)];
        movie_out(idx_frame).cdata=frame_out;
    end
    writerObj=VideoWriter([pathstr filesep name '_new' ext],'Uncompressed AVI');
    open(writerObj);
    writeVideo(writerObj,movie_out);
    close(writerObj);
  end