HOW can i find number of frames using vision.VideoFileReader?

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syhem samti
syhem samti 2015-11-17
评论： Saffana Siddiqua 2019-12-10
i didn't find a way to determiner number of frames using vision.VideoFileReader...any idea?

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回答（1 个）

Dinesh Iyer
Dinesh Iyer 2015-11-17
To use the system object to determine this value, you will have to read through the entire file like this:
vfr = vision.VideoFileReader;
numFrames = 0;
while ~isDone(vfr)
step(vfr);
numFrames = numFrames + 1;
end
The VideoReader object has a property called NumberOfFrames that you can query for this value. Starting R2014b, the doc says that this property is being deprecated. However, its been 3 releases but its still going strong.
Dinesh

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