how can i embedd an audio and deal with audio

hello i wanted to ask how can i embedd and audio iside the video hoe can i deal with the audio?

Answer 1

[Nitin Kapgate]

You can use the following code snippet to embed the audio in a video file:

% Assuming your input file is named as "inputVideo.avi", read the video file   
v = VideoReader('inputVideo.avi'); 

% Create a  video file writer object.  
% "AudioInputPort" property controls whether the object writes audio samples to the video file.  
% Set this value to true to write audio data.  
% To write audio and video to a file, you must use the .avi format.
videoWriterObj = vision.VideoFileWriter('OutputVideo.avi','AudioInputPort',true); 

% total number of frames in input video 
nFrames   = v.NumFrames;

% assign FrameRate of input video to output video
videoWriterObj.FrameRate =  v.FrameRate;
    
% Read the input audio file, assuming your input audio file is named as "inputAudio.wav" 
[y,Fs] = audioread('inputAudio.wav');   
  
% length of the audio samples to be put per frame
samplesPerFrame = round(size(y,1)/nFrames);

for k = Fs : nFrames
    % Read one video frame at a time
    Frame = readFrame(v);
    % add the audio samples to the variable in the step function
  
    step(videoWriterObj,Frame,y(samplesPerFrame*(k-1)+1:samplesPerFrame*k,:)); % Assuming two channel stereo audio
end
 
% release the video reader object 
release(v);
% release the video file writer object 
release(videoWriterObj);