How to save image of a video.avi file into the folder where Matlab is running as image.bmp file?

14 次查看（过去 30 天）
Emerson De Souza
Emerson De Souza 2012-1-17
Motivation: I'm currently using VirtualDub v1.9.11 (Free Software) to load a video.avi file and extract all images one by one and save them as .bmp, which later I use in Matlab.
What I want to do: I would like to load a video.avi file and save each image of the video in the current folder where Matlab is running using the following naming and extension: 1.bmp 2.bmp 3.bmp n.bmp and so son.
*What I have done so far:* Until now I know only to load the video using the command lines below:
cd 'C:\Program Files\MATLAB\R2011a\toolbox\vision\visiondemos';
M = mmreader('shaky_car.avi');
N = M.NumberOfFrames;
for ii = 1:N
image(M.read(ii));
pause(0.1);
end
cd C:\Users\Emerson\Desktop\MOVIE_ANALYSIS
For this particular case, the video shaky_car.avi has 132 images, so the folder would be filled with the files 1.bmp, 2.bmp, 3.bmp, and so on until 132.bmp.
I wonder if someone could tell me how to write the command lines to do this job.
Thanks in advance for your help
Emerson

请先登录，再回答此问题。

采纳的回答

Chandra Kurniawan
Chandra Kurniawan 2012-1-17
Hi,
'shaky_car.avi' is already exist in visiondemos folder,
so you do not need to change the directory by
cd 'C:\Program Files\MATLAB\R2011a\toolbox\vision\visiondemos';
Just try my code and I hope this works on your machine.
obj = mmreader('shaky_car.avi');
vid = read(obj);
nFrame = size(vid,4);
for k = 1 : nFrame
newname = strcat(num2str(k),'.bmp');
imwrite(vid(:,:,:,k), newname);
end

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Import, Export, and Conversion 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by