How to combine audio and video?
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keshav poojari
on 10 Dec 2018
Commented: Walter Roberson
on 24 Feb 2019
it will run.. but not play the video... please tell me what the problem and how to resolve that?
videoFReader = vision.VideoFileReader('video1.avi');
[AUDIO,Fs] = audioread('audio1.wav');
videoFWriter = vision.VideoFileWriter('newvideo.avi','AudioInputPort',true);
videoFrame = step(videoFReader);
step(videoFWriter,videoFrame,AUDIO);
release(videoFReader);
release(videoFWriter);
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Accepted Answer
Walter Roberson
on 10 Dec 2018
You are writing all of the audio for the first frame and only reading and writing one frame.
you need to loop reading one input frame and writing that frame out together with the audio that matches it. For example if your audio output rate were 44100 and your video output were 22 frames per second then you should emit roughly 2000 audio samples for each video frame .
You might want to buffer() your audio to make it easier to write the appropriate amount of audio per frame .
15 Comments
Walter Roberson
on 24 Feb 2019
keshav poojari, you might need to post-process the video.
But have a look at the description of the AudioCompressor and VideoCompressor properties that you can set for vision.VideoFileWriter. The choices depend upon what you have installed on your system, so I cannot tell you what the choices are.
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