Setting frames from mid video

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.

Answer 1

[Geoff Hayes]

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.

[Daevin]

Fantastic. Of course its the last placement I didn't try. For anyone that uses this, change the numFrames to nFrames.