MATLAB: Video to frame conversion

error

i wanted to convert a video to frames… the video was in mp4 format… so i converted it into avi format and did the video to frame conversion… but when i execute the code the following error appears… what shud i do to rectify the error… please do reply…

??? Error using ==> aviread at 76

Unable to locate decompressor to decompress video stream

Error in ==> VideotoFrame at 5

vi=aviread(strcat( vpathname, vfilename ));

Best Answer

Use aviinfo to determine which compressor was used.

If the compressor was one of the Indeo series, then the file cannot be decompressed on any 64 bit version of MATLAB (the manufacturer of the Indeo compressor refuses to release a 64 bit version of the decompressor.)

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MATLAB: Do I get an errorWithFileClose error when I use AVIREAD in MATLAB 7.8 (R2009a) on Linux

The video file is a 16 bit AVI file, which is not the most conventional kind of AVI file. Most AVI files are 8 bits per channel or 24 bpp.

Although this file can be read with MMREADER on Windows, AVIREAD and MMREADER fail to read this file on Linux. This is because GStreamer on Linux does not have the appropriate plugin to read this kind of AVI file. This a limitation of the GStreamer plugin.

A workaround is to use MMREADER on Windows to read this file and write it out as an uncompressed AVI file with 8 bits per channel. Then you can read that uncompressed AVI file on your Linux machine.

Here is an example of the conversion code to be run in Windows:

% Read in AVI file and get frames
readerobj = mmreader('bit16avi.avi', 'tag', 'myreader1');
vidFrames = read(readerobj);
% Get the number of frames
numFrames = get(readerobj, 'numberOfFrames');
% Add frames into a MATLAB movie
for k = 1 : numFrames
      mov(k).cdata = vidFrames(:,:,:,k);
      mov(k).colormap = [];
end
% Play movie in MATLAB
movie(mov);
% Save movie as AVI file to be read in Linux
movie2avi(mov,'output.avi','compression','none');

MATLAB: How am I to open an avi file for motion tracking

Use aviinfo() or mmfileinfo() or VideoReader.get() to examine the properties of the AVI file.

It could be that the AVI file uses a codec that you do not have installed. That happens especially for the Indeo5 codec, which is not installed by default in Windows 7, and it is not possible to get a version of the Indeo5 codec that works with a 64 bit version of MATLAB.

Best Answer

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MATLAB: Do I get an errorWithFileClose error when I use AVIREAD in MATLAB 7.8 (R2009a) on Linux

MATLAB: How am I to open an avi file for motion tracking

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