Error: vision.Vid​eoFileWrit​er/step Too many input arguments. Expected 1 (in addition to System object), got 2.

I get this error when trying to create a '.mp4 file' using the appended code.

Warning: The AudioInputPort property is not relevant in this

configuration of the System object.

Error using vision.VideoFileWriter/step

Too many input arguments. Expected 1 (in addition to System object), got 2.

Error in Audio_combine_evening (line 50)

step(writerObj, img, parsedAudio);

The code is appended below; it worked perfectly well in creation of a '.avi' file.

[data, freq] = audioread('EC.wav'); % Reading the audio file
img = imread('Image.png'); % Reading the image file
audioLength = length(data)/freq;% duration of audio file
writerObj = vision.VideoFileWriter('Filename','newvideo.avi','AudioInputPort',true,'FrameRate', 1); % for .avi file
% writerObj =  vision.VideoFileWriter('Filename','newvideo.mp4','FileFormat','MPEG4','AudioInputPort',true,'FrameRate', 1); % for .mp4 file
for i = 1:audioLength
    parsedAudio = data((i-1)*length(data)/audioLength + 1:i*length(data)/audioLength);%parsing the audio into equally sized pieces (play for 1 sec) 
    step(writerObj, img, parsedAudio);
end
release(writerObj);

Answer 1

[Walter Roberson]

writerObj  = vision.VideoFileWriter('newvideo.avi','AudioInputPort',true,'FrameRate', 1); % for .avi file

[Walter Roberson]

note that the function call only supports audio to avi and not to mp4

[SKP]

Thank you for answering.

Is there a way within MATLAB to combine (i) an image file and (ii) an audio file to get a (iii) .mp4 file or should I resort to some other software for converting the generated .avi file to .mp4

[Walter Roberson]

https://www.mathworks.com/help/dsp/ref/tomultimediafile.html

However, the documentation says MPEG is supported for Windows 7 and MacOS. It is not obvious at the moment whether "Windows 7" excludes Windows 8 and Windows 10.