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

Question

SKP 2021-7-18

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/881138-error-vision-videofilewriter-step-too-many-input-arguments-expected-1-in-addition-to-system-objec

评论： Walter Roberson 2021-7-18

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

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);

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Answer 1

Walter Roberson 2021-7-18

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/881138-error-vision-videofilewriter-step-too-many-input-arguments-expected-1-in-addition-to-system-objec#answer_749178

在 MATLAB Online 中打开

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

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SKP 2021-7-18

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 2021-7-18

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.

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