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  • movie2avi - how to fix the frame size ?

    18 décembre 2019, par Ed Mendes

    I have searched stackoverflow for a similar question and I found question "movie2avi-frame-size-error-and-keeping-frame-size-constant". Unfortunately the answer given there did not solve my problem (it has been suggested the use of xlim, ylim and zlim).

    In what follows I send a lightly modified version of a well-known example given elsewhere.

    %# figure
    
figure, set(gcf, 'Color','white')
    
Z = peaks; surf(Z);  axis tight
    
set(gca, 'nextplot','replacechildren', 'Visible','off');
    
[az,el]=view;
    
xl=xlim;
    
yl=ylim;
    
zl=zlim;
    

    
%# preallocate
    
nFrames = 20;
    
mov(1:nFrames) = struct('cdata',[], 'colormap',[]);
    

    
%# create movie
    
for k=1:nFrames
    
   view([(az-k*10) el]);
    
   xlim(xl);ylim(yl);zlim(zl);
    
   drawnow;pause(0.1);
    
   mov(k) = getframe(gca);
    
end
    
close(gcf)
    

    
%# save as AVI file, and open it using system video player
    
movie2avi(mov, 'myPeaks1.avi', 'compression','None', 'fps',10);

    The idea is to rotate the figure and create a movie. Everything works fine except for the last command, that is, movie2avi. The error msg is

    Error using avifile/addframe>ValidateFrame (line 290)
    
Frame must be 435 by 344.
    

    
Error in avifile/addframe (line 158)
    
ValidateFrame(aviobj,width, height,dims);
    

    
Error in movie2avi (line 67)
    
avimov = addframe(avimov,mov);
    

    
Error in more_video_test (line 24)
    
movie2avi(mov, 'myPeaks1.avi', 'compression','None', 'fps',10);

    I have looked at approaches-to-create-a-video-in-matlab here in stackoverflow and found that :

    a) Solution ffmpeg works but I would like to avoid it.
    b) All other solutions failed even QTWriter. How can I fix the frame size so that all these other solutions work ?

    Many thanks.

    Ed

  • movie2avi - how to fix the frame size ?

    2 octobre 2013, par Ed Mendes

    I have searched stackoverflow for a similar question and I found question "movie2avi-frame-size-error-and-keeping-frame-size-constant". Unfortunately the answer given there did not solve my problem (it has been suggested the use of xlim, ylim and zlim).

    In what follows I send a lightly modified version of a well-known example given elsewhere.

    %# figure
    
figure, set(gcf, 'Color','white')
    
Z = peaks; surf(Z);  axis tight
    
set(gca, 'nextplot','replacechildren', 'Visible','off');
    
[az,el]=view;
    
xl=xlim;
    
yl=ylim;
    
zl=zlim;
    

    
%# preallocate
    
nFrames = 20;
    
mov(1:nFrames) = struct('cdata',[], 'colormap',[]);
    

    
%# create movie
    
for k=1:nFrames
    
   view([(az-k*10) el]);
    
   xlim(xl);ylim(yl);zlim(zl);
    
   drawnow;pause(0.1);
    
   mov(k) = getframe(gca);
    
end
    
close(gcf)
    

    
%# save as AVI file, and open it using system video player
    
movie2avi(mov, 'myPeaks1.avi', 'compression','None', 'fps',10);

    The idea is to rotate the figure and create a movie. Everything works fine except for the last command, that is, movie2avi. The error msg is

    Error using avifile/addframe>ValidateFrame (line 290)
    
Frame must be 435 by 344.
    

    
Error in avifile/addframe (line 158)
    
ValidateFrame(aviobj,width, height,dims);
    

    
Error in movie2avi (line 67)
    
avimov = addframe(avimov,mov);
    

    
Error in more_video_test (line 24)
    
movie2avi(mov, 'myPeaks1.avi', 'compression','None', 'fps',10);

    I have looked at approaches-to-create-a-video-in-matlab here in stackoverflow and found that :

    a) Solution ffmpeg works but I would like to avoid it.
    b) All other solutions failed even QTWriter. How can I fix the frame size so that all these other solutions work ?

    Many thanks.

    Ed

  • ffmpeg convert swf to mp4 error [migrated]

    30 août 2014, par wy1100

    my command :

    ffmpeg -i /Users/xxx/Downloads/demo.swf -y /Users/xxx/Downloads/demo.mp4

    demo.swf has many frames and 9 photos, but ffmpeg convert result is only 9 frames :

    "frame=9 fps=0.0 q=-1.0 Lsize=180kB time=00:00:00.29 bitrate=5057.4kbits/s"

    and

    ffmpeg input stream is

    Stream #0:0: Video: mjpeg, yuvj444p(pc, bt470bg), 420x420, 24 fps, 24 tbr, 24 tbn

    it is mjpeg format.

    but i used another swf, the input is "Stream #0:0: Video : flv",

    the another one works. This swf convert result is "frame = 200 time=20".

    Is it the format problem ?

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