MATLAB: Setting frames from mid video

Computer Vision ToolboxImage Processing Toolboxvideo edittingvideo segments

I need to take 300 frames from the middle of a huge video (20000 frames) to do further manipulation. I got the following from the xylophone example but it only takes frames from the start of the video; I need to set a smaller video from frames 3701:4000:
Clip1 = VideoReader('C:\Users\(username)\Videos\Day3.4.avi');   %xylophone.mp4');
nFrames = 500;  %Clip1.NumberOfFrames;
vidHeight = Clip1.Height;
vidWidth = Clip1.Width;
%%Movie Structure
mov(1:nFrames) = ...
    struct('cdata',zeros(vidHeight,vidWidth, 3,'uint8'),...
           'colormap',[]);
%%Reading frames
for k = 1 : nFrames
    mov(k).cdata = read(Clip1,k);
end
hf = figure;
set(hf, 'position', [150 150 vidWidth vidHeight])
Any help would be greatly appriciated.

Best Answer

Daevin - according to videoreader.read, it is possible to read in whichever frame that you wish
video = read(obj,index) reads only the specified frames. index can be a single number or a two-element array representing an index range of the video stream.
If you are interested only in the 300 frames starting at 3701, then your above code could be modified as
 nFrames   = 300;  %Clip1.NumberOfFrames;
 vidHeight = Clip1.Height;
 vidWidth  = Clip1.Width;
 %%Movie Structure
 mov(1:nFrames) = ...
    struct('cdata',zeros(vidHeight,vidWidth, 3,'uint8'),'colormap',[]);
 %%Reading frames
 for k = 1:nFrames
    mov(k).cdata = read(Clip1,3700+k);
 end
Try the above and see what happens!
EDIT
Corrected the numFrames to nFrames as per Daevin's comment below.
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