Importing large .avi files into MATLAB

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Jason
Jason 2011-12-2
I am struggling to get a video imported into MATLAB with the error that "ran out of memory"
The video is just over 2000 frames and just over 1GB in size.
I have tried avireader and mmreader at no avail.
Can I import a large video into MATLAB frame-by-frame
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Doug Hull
Doug Hull 2011-12-2
Edited to simplify question. Each question should be a single question. Ask another question for the other aspects.
Jason Ross
Jason Ross 2011-12-2
Also, details of the hardware (specifically the amount of RAM) and OS bit-ness (32 or 64 bit) would be helpful.

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回答（1 个）

Image Analyst
Image Analyst 2011-12-2
You should be able to using the VideoReader class. Here's the example from the help:
Examples
Construct a VideoReader object for the demo movie file xylophone.mpg and view its properties:
xyloObj = VideoReader('xylophone.mpg', 'Tag', 'My reader object');
get(xyloObj)
Read and play back the movie file xylophone.mpg:
xyloObj = VideoReader('xylophone.mpg');
nFrames = xyloObj.NumberOfFrames;
vidHeight = xyloObj.Height;
vidWidth = xyloObj.Width;
% Preallocate movie structure.
mov(1:nFrames) = ...
struct('cdata', zeros(vidHeight, vidWidth, 3, 'uint8'),...
'colormap', []);
% Read one frame at a time.
for k = 1 : nFrames
mov(k).cdata = read(xyloObj, k);
end
% Size a figure based on the video's width and height.
hf = figure;
set(hf, 'position', [150 150 vidWidth vidHeight])
% Play back the movie once at the video's frame rate.
movie(hf, mov, 1, xyloObj.FrameRate);
  2 个评论
Jason
Jason 2011-12-7
Thank you for your response.
VideoReader does not work for my version of MATLAB but mmreader will.
The problem I am still getting is that eventually I run out of memory.
Is there a way where you can read in one frame at a time, show that frame, then ask MATLAB to read in the next frame and replace the previous frame, thus making a movie this way?
Thank you
Jason
Andreas Goser
Andreas Goser 2011-12-7
We're talking about a 64 Bit system, right?

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