Processing Frames from a Video
9 views (last 30 days)
I have a piece of code where I read an image and then do some processing with it. If I instead have an AVI file, is there a simple way to read the video file, select a chosen frame from it, and then analyse that frame as an image?
III0 = double(imread('Documents\sphereattempt.png'));
III1 = (III0(:,:,3)./(III0(:,:,1)+III0(:,:,2)+III0(:,:,3)));
David K. on 15 Apr 2022
The VideoReader object looks like the way to go. With the basic case being:
v = VideoReader('example.avi');
frame = readFrame(v);
% processing for each frame goes here
Where frame is an individual image. If you want to start from a specific time you can use
v.CurrentTime = 2.5; % time in seconds to start
then use readFrame to get the frame you want.
Something that may go wrong is shown on Supported Video Formats where there is a troubleshooting section talking about how there is a chance that you will need to install some other things if your specific avi format is not currently readable by your matlab install. I have not personally tried any of these methods to fix a format issue.