使用writeVideo（Ubuntu）时，Matlab中没有数据写入文件

Question

我正在尝试使用Matlab从ascii数据创建一个电影文件。我在Ubuntu 13.10上运行Matlab。当我运行我的Matlab脚本（见下文）时，框架显示正确，最后创建.avi视频文件，但文件中没有数据。

clc
clear all

 writerObj=VideoWriter('testVideo');
 writerObj.FrameRate = 10;
 open(writerObj);

for i=1:15000
    j=i*100;
    str=[num2str(j),'_Temp1.dat'];
    t=importdata(str);
    showaxes;
    colorbar;
    imagesc(t);
    set(gca,'ydir','normal')
    frame=getframe;
    writeVideo(writerObj,frame);
   % movieFrames(:,i) = frame;
end
close(writerObj);

在Matlab中我收到错误：

Warning: No video frames were written to this file.  
The file may be invalid.  
> In VideoWriter.VideoWriter>VideoWriter.close at 307
In VideoWriter.VideoWriter>VideoWriter.delete at 256
In videomaker at 2  

Error using importdata (line 136)
Unable to open file.

Error in videomaker (line 11)
t=importdata(str);