How to draw the audio track from a video which contains audio?

Hi there, I want to draw the audio track and analyze it from a video which has audio, but it seems that the "videoreader" cannot do this function, so I wanna whether there is any method that can do this function? Many thanks!

Answer 1

[Raghava S N]

Hi,

As you are looking to extract audio data from a video file, the function “audioread” can be used. The “audioread” function can take a MPEG-4 AAC (“.m4a” or “.mp4”) video file as input, from which the audio data can be extracted. Refer to the documentation of “audioread” for more information - https://www.mathworks.com/help/matlab/ref/audioread.html#:~:text=.mp3)%2C-,MPEG%2D4%20AAC%20(.m4a%2C%20.mp4),-%2C%20OGG%20(.ogg.

Here is a code snippet that displays this functionality –

>> [y,Fs] = audioread('<path_to_your_video/your_video>.mp4');
>> audiowrite('outputfile.WAV',y,Fs);

The extracted audio can be stored in a format supported by MATLAB. Refer to this documentation link for the list of audio formats supported by MATLAB - https://www.mathworks.com/help/matlab/import_export/supported-video-file-formats.html#:~:text=in%20MATLAB%20again.-,Audio%20Data%20in%20MATLAB,-What%20Are%20Audio.

For additional details on extracting audio from videos, refer to this MATLAB Answers post - https://www.mathworks.com/matlabcentral/answers/437261-how-to-extract-audio-from-mp4.

Hope this helps!