MATLAB: Extract the last frame and check the video info

last frame and video infoMATLAB

obj=VideoReader('111.wmv');

a=read(obj);

frames=get(obj,'numberOfFrames');

   for k = 1 : frames
       I(k).cdata = a(:,:,:,k);
       I(k).colormap = [];
   end

implay(I)

"" 1st Question:

how i need to take out my last frame???? if i dont knw what is my frame go on

2nd Question:

how do i check ,the info of my video avi is "fileinfo=wmvinfo('111.wmv')" but mine was not avi folder

Best Answer

After the loop you show, the last frame will be I(end).cdata

I do not understand what you mean about "mine was not avi folder" ?

Related Solutions

MATLAB: How do i extract the frame and shw it out with imshow (HELP)

a=read(obj,1); this will give you the first frame,when instead of '1' you will write '2' you will get the second frame and so on.

MATLAB: How to convert the video (>2 GB) to uncompressed AVI grayscale in MATLAB 7.12 (R2011a)

In order to use the VideoWriter to create an uncompressed AVI in grayscale, you need to create a VideoWriter object with the profile set to 'Uncompressed AVI'. Then create a movie structure that has grayscale frames by using the RGB2GRAY function and use the WRITEVIDEO function to write the frames in the movie to the AVI file. Then close the VideoWriter object using the CLOSE function.

Please refer to the following sample code:

% Read sample video.
xyloObj = VideoReader('xylophone.mpg');
% Get details.
nFrames = xyloObj.NumberOfFrames;
vidHeight = xyloObj.Height;
vidWidth = xyloObj.Width;
% Define colormap
map = [(0:255)' (0:255)' (0:255)']/255;
% Preallocate movie structure.
mov(1:nFrames) = struct('cdata', zeros(vidHeight, vidWidth, 'uint8'),'colormap', map);
% Read one frame at a time.
for k = 1 : nFrames
      mov(k).cdata = rgb2gray(read(xyloObj, k));
end
% Prepare the new file.
vidObj = VideoWriter('videowrite.avi','Uncompressed AVI');
open(vidObj);
% Write video
writeVideo(vidObj, mov);
% Close video writer object
close(vidObj);

Best Answer

Related Solutions

MATLAB: How do i extract the frame and shw it out with imshow (HELP)

MATLAB: How to convert the video (>2 GB) to uncompressed AVI grayscale in MATLAB 7.12 (R2011a)

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