NumberOfFrames using VideoReader function matlab 2016a

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Ravindra 2018-11-20

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https://ww2.mathworks.cn/matlabcentral/answers/430913-numberofframes-using-videoreader-function-matlab-2016a

评论： Ravindra 2018-11-20

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Hi all,

The object created using VideoReader function in matlab does not show the NumberOfFrames.

Referring to https://de.mathworks.com/matlabcentral/answers/250033-number-of-frames-in-video-file-with-matlab-2015b

This could be because of the variable frame rate.

The Number of frames can be estimated:

vidObj = VideoReader('myfile.MOV');
numFrames = ceil(vidObj.FrameRate*vidObj.Duration);

In My algorithm I needed to pick a particular frame, so I decded to export all frames as picture using:

    vidObj = VideoReader('myfile.MOV');
    numFrames = 0;
    while hasFrame(vidObj)
        readFrame(vidObj);
        numFrames = numFrames + 1;
    end

But after 14000 frame has been exported I encountered the following error:

What could be possible reason for this error? or skip this particular frame

How could this be fixed??

Thank you very much for your suggestions and help in advance.

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Jan 2018-11-20

Did you search in the internet and this forum already?

https://www.mathworks.com/matlabcentral/answers/306777-error-reading-mp4-file-unknown-error-0xc00d002f

Ravindra 2018-11-20

Thanks Jan for the link.

After reading the discussion...that means the video is mix of encrypted and unencrypted (Mixed segments).

How it is possible to make it uniform??

Is there any tool available to convert the *.MOV file to *.avi or some other standard matlab format??

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