splitting a video into frames using image function after using mmreader to read video file...

13 次查看（过去 30 天）
Yagnaseni Roy
Yagnaseni Roy 2011-10-17
*I wasn't being able to bring an avi file into the workspace, so I brought the video into the MATLAB file and played it using implay...then I want to split it into its individual frames..
According to the solution by Walter Roberson on
http://mathworks.com/matlabcentral/answers/18413-using-getframe-to-separate-frames-from-a-video-need-easy-code#answer_24718 I put:*
n=size('cell.avi')
n =
1 8
for frame= 1:n
('cell.avi')(frame)=getframe;
|
But I get_ :Error: Unbalanced or unexpected parenthesis or bracket.
_
image function!!*
Now I want the individual frames as individual images, so I put: image(('cell.avi')(1).cdata) image(('cell.avi')(1).cdata) | *Error: Unbalanced or unexpected parenthesis or bracket. * *What is wrong? I've been able to load the movie, but now I can't split it into the frames using

请先登录，再回答此问题。

采纳的回答

Image Analyst
Image Analyst 2011-10-18
Look at the help for mmreader() . . . again . . . more carefully this time. You'll see read() does not take a string, it take the movie object, and the number of the frame you want to read. So instead of
video = read('cell.avi');
you'd want
% Read from ii from movie M
oneFrame = read(M, ii);
  7 个评论
显示 5更早的评论
Yagnaseni Roy
Yagnaseni Roy 2011-10-19
Btw,
referring to M = mmreader('cell.avi');
N = M.NumberOfFrames;
for ii = 1:N
image(M.read(ii));
pause(0.1);
end
HOW WOULD I CALL FOR AN INDIVIDUAL FRAME...SUPPOSE FRAME 5?? i TRIED image(M.read(5));
...IS THIS NOT SUPPOSED TO WORK?
Yagnaseni Roy
Yagnaseni Roy 2011-10-19
Doing this, I seem to get the last frame each time...even when I change to image(M.read(6));image(M.read(20));....they all look the same.

请先登录，再进行评论。

更多回答（2 个）

Sean de Wolski
Sean de Wolski 2011-10-17
n=size('cell.avi')
will say that n = [1 8] since 'cell.avi' is an eight letter long string (row vector of characters).
Here's probably closer to what you want:
M = aviread('rhinos.avi');
for ii = 1:length(M)
image(M(ii).cdata)
pause(.1)
end
  10 个评论
显示 8更早的评论

请先登录，再进行评论。

Dimple Chawla
Dimple Chawla 2012-4-17
hey, it really helped me too, actually i'm working on similar project like calculating difference of object property in frame such as 1st and the 20th or the last frame. Can u help on this.?? I will deftly appreciate your effort. Thanks reply asap

类别

在 Help Center 和 File Exchange 中查找有关 Blocked Images 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by