how can i feed the pre-recorded video to the following code instead of live video(from webcam)/ or how can i save the live video in a 'disk'

Greeting to the community, I am using matlab for image processing. anybody knows that how can i feed a pre-recorded video to the following code instead of live video(from webcam)?

I need to input pre-recroded video, or using live video but save the video in a folder first (using 'disk' instaed of 'memory') before proceeding the next stage (image processing).

a part of the code:

% Select video format

hws = imaqhwinfo ;

hw = imaqhwinfo(hws.InstalledAdaptors{end},1) ;

VideoFormat = hw.SupportedFormats;

% Select video format

hws = imaqhwinfo ;

hw = imaqhwinfo(hws.InstalledAdaptors{end},1) ;

VideoFormat = hw.SupportedFormats;

set(handles.text_vf, 'String', ['Video Format : ', 'YUY2_640x480']);

% set videoinput object

video = videoinput('winvideo',1,'YUY2_640x480');

set(video,'FramesPerTrigger',10);

set(video,'ReturnedColorSpace','grayscale');

set(video,'LoggingMode','memory');

triggerconfig(video,'immediate');

set(video,'FramesAcquiredFcnCount', 3);

set(video,'FramesAcquiredFcn', {@FramesAcquiredFcn,hObject});

% Preview UPDATE

vidRes = get(video, 'VideoResolution');

vidWin = image(zeros(vidRes(2), vidRes(1)),'Parent',handles.Preview);

preview(video,vidWin);

Answer 1

[Mohammad Sami]

You can use the VideoReader to read a video file.

v = VideoReader('xylophone.mp4');

while hasFrame(v)
    frame = readFrame(v);
end

[Koohyar]

Hi Mohammad, thanks for your suggestion. Unfortunetly it shows error! I imported the video from the Image Acquisition Tool, and saved in in the directory (.mp4), but it shows error when I call the video (based on your advice), as below:

Error using VideoReader/get

Property VideoResolution not found in class VideoReader, or is not present in all elements of the array of class VideoReader

Any advice you could give would be much appreciated!

thanks

[Mohammad Sami]

Video reader class does any property video Resolution. If you want resolution you will have to get Height and width properties.

Documentation of video reader is available here

https://www.mathworks.com/help/matlab/ref/videoreader.html