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I write this code but have error "Undefined function 'readframe' for input arguments of type 'VideoReader'"
How to I will solve? thank you.
v = VideoReader('filename.avi');
video = readframe(v,1);
figVid = figure();
axeVid = axes('Parent', figVid);
image(video, 'Parent', axeVid);
Actual Answer: The function is readFrame() not readframe().
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I want to define a vector y=[sin(1),sin(1/2),...,sin(1/1000)].
but I don't know how to do that. I defined
for i=1:1000
y(i)=sin(1/i);
end
but this does not work.
Just define the y as the following (and initialize to get the better performance):
y = zeros(1, 1000);
for i = 1:1000
y(i) = sin(1/i);
end
Also you can do it without for:
y = sin(1./(1:1000));
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I 'm using this 720_15_LDP_OFF_values as matrix name in Matlab 2015b but I get the following error:
The input character is not valid in MATLAB statements or expressions.
From the MATLAB documentation:
A valid variable name starts with a letter ... .
But your variable started with a digit.
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I have to read video frames one by one from image and store each frame in an array which I can further use. I guess there must be some loop which can do this work.
I am using:
video=VideoReader('sample.avi')
frm = read(video) % to get frame
but MATLAB gives error on read command and close automatically as shown in the attached image:
.
Can anyone help me please?
From the documentation:
v = VideoReader('xylophone.mp4');
while hasFrame(v)
video = readFrame(v);
end
or from the documentation of VideoReader.read
video = read(v,[1 Inf]);
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Closed 8 years ago.
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I have tried the code from the link Ear Image Processing - Finding the point of intersection of line and curve in MATLAB
but seem to get an error as dist2s is undefined on matlab R2013a.Can anyone help me out
That's because you need to create the function (isn't defined by MatLab itself). Try saving this code in a file called dist2s.m and then setting the folder where it's located like current folder:
function out = dist2s(pt1,pt2)
out = NaN(size(pt1,1),size(pt2,1));
for m = 1:size(pt1,1)
for n = 1:size(pt2,1)
if(m~=n)
out(m,n) = sqrt( (pt1(m,1)-pt2(n,1)).^2 + (pt1(m,2)-pt2(n,2)).^2 );
end
end
end
return;
The code is provided in the same answer you refer to.
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When I am trying to use linspace in MATLAB I am getting the above error. How do I resolve it?
I am using linspace in a very simple statement:
t= linspace(0,8760,876);
Why don't you try to check internal matlab path? If you get that error is because Matlab cannot find the definition of the function. Thought it is weird as it is a basic function.
It's probably a path issue. Run restoredefaultpath.