add/extract Audio to/from Video

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Mike Dachui
Mike Dachui 2020-4-28
评论： Mike Dachui 2020-4-30
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!!!

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Mehmed Saad
Mehmed Saad 2020-4-28
编辑：Mehmed Saad 2020-4-28
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');

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