hi i hve to add audio file to video file ...but im getting error plz help me..

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Gohan 2016-10-10

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/306569-hi-i-hve-to-add-audio-file-to-video-file-but-im-getting-error-plz-help-me

评论： Gohan 2016-10-12

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

my code is

videoFReader = vision.VideoFileReader('audio.avi');
[AUDIO,Fs] = wavread('audio.wav');
videoFWriter = vision.VideoFileWriter('myfile.avi');
videoFrame = step(videoFReader);
step(videoFWriter,videoFrame,AUDIO);
release(videoFReader);
release(videoFWriter);

both are different files im getting error as

Error using vision.VideoFileWriter/step
Too many input arguments; expected 1 (in addition to the object handle), got 2.
Error in ex (line 5)
step(videoFWriter,videoFrame,AUDIO);

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Walter Roberson 2016-10-10

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/306569-hi-i-hve-to-add-audio-file-to-video-file-but-im-getting-error-plz-help-me#answer_238336

编辑：Walter Roberson 2016-10-10

Your call to vision.videoFileWriter needs to add 'AudioInputPort', true

https://www.mathworks.com/help/vision/ref/vision.videofilewriter-class.html#bse_r6d-3

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Walter Roberson 2016-10-12

在 MATLAB Online 中打开

framebounds = 1 : floor(Fs/framerate) : size(AUDIO,1);

Another way to proceed would be to split your audio into one variable (or cell member) per channel, and then use the buffer() function with size floor(Fs/framerate) per frame. Use i pull the appropriate column out.

You will have a problem with accumulation of round-off error on the number of samples. For example if you had 1000 samples per second and a frame rate of 30, then that would round down to 33 audio samples per frame. Put 30 of those frames together and you would have only reached 990 samples instead of 1000. The code I posted before was intended to partition up the samples unequally if need be in order to avoid that kind of accumulated error; unfortunately it appears that the file writer does not approve.

To get around this issue you might want to consider using a resample routine so that each frame gets the same number of samples.

Watch out as well for the end of audio in the middle of a frame.

Gohan 2016-10-12

Sir I'm getting video and audio only a fraction of second sir ... Only to a single frame the audio samples are added ...resultant video has only a fraction of second video with audio

Gohan 2016-10-12

Thanku so much sir I'm getting output ....

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