add/extract Audio to/from Video

How can I extract an audio document(*.wav) from a video document(*.avi)???

How can I add an audio document(*.wav) to a video document(*.avi)???

THX!!!THX!!!THX!!!

Answer 1

[Mehmed Saad]

Write audio in a video using vision.VideoFileWriter. The source of code

VideoFrameRate = 24;
TempImage = imread('cameraman.tif');
load handel.mat
y = y(1:4 * Fs, :); % select the first 4s
AudioStep = Fs / VideoFrameRate;

videoFWriter = vision.VideoFileWriter('Temp.avi', 'FileFormat', 'AVI',...
    'FrameRate', VideoFrameRate, 'AudioInputPort', true);

for i = 1:(VideoFrameRate * length(y) / Fs)
    TempIndexBeginning  = floor((i - 1) * AudioStep) + 1;
    TempIndexEnding     = ceil(TempIndexBeginning + AudioStep - 1);
    step(videoFWriter, TempImage, y(TempIndexBeginning:TempIndexEnding));
end

release(videoFWriter);

Read Sound from Video directly usind audioread

[y1,Fs1] = audioread('Temp.avi');

[Mike Dachui]

Sorry for my late reply! Really helpful! Thanks a lot!