problem in mmreader command

when i am trying to read an .avi file .. ...The name of the file is 'kumar.avi"

here are the codes

video1=mmreader('kumar.avi');

   get(video1)

   nFrames = video1.NumberOfFrames;
  vidHeight = video1.Height;
  vidWidth = video1.Width;

% Preallocate movie structure.
mov(1:nFrames) = ...
    struct('cdata', zeros(vidHeight, vidWidth, 3, 'uint8'),...
           'colormap', []);

Following errors are coming ??? Error using ==> mmreader at 84 Unable to locate decompressor to decompress video stream

Error in ==> tryvidext at 3 video1=mmreader('kumar.avi');

kindly tell the possible reasons for it

Answer 1

[Walter Roberson]

The .avi has been encoded with a codec that your system does not currently have.

If you are running the 64 bit version of MATLAB, then there are some codec (Indeo5 is one) that will never be supported on the 64 bit version (this is a decision by the codec manufacturers, not by MathWorks.)

You should be able to find information about the codec that was used by using aviinfo()

[Walter Roberson]

R2011b or later is needed to support H.264 and MPEG-4.

You might be able to use the following work-around:

http://www.mathworks.com/matlabcentral/newsreader/view_thread/252119

Answer 2

[Max]

following information came on implementing fileinfo=aviinfo('kumar.avi')

>>fileinfo

              Filename: 'E:\project works\FGseg\kumar.avi'
              FileSize: 1294656
           FileModDate: '03-Mar-2012 11:55:47'
             NumFrames: 165
       FramesPerSecond: 29.9700
                 Width: 640
                Height: 480
             ImageType: 'truecolor'
      VideoCompression: 'H264'
               Quality: 4.2950e+007
    NumColormapEntries: 0
           AudioFormat: 'Format # 0x55'
             AudioRate: 24000
      NumAudioChannels: 1