This doesn’t direct;y answer your question, but look through the source code at this link:
http://www.gamedev.net/topic/624876-how-to-read-an-audio-file-with-ffmpeg-in-c/ This code will take you through parsing an audiostream. A couple of calls are deprecated but you can replace them easily enough. On Apr 2, 2016, at 11:34 AM, Haris PP <[email protected]> wrote: > Hi, > > I need to plot wave form of audio as explained here > http://stackoverflow.com/questions/16509906/ffmpeg-can-i-draw-an-audio-channel-as-an-image, > I found that some command line option for plotting to image, but my > requirement is do from c++ code and draw live waveform on UI. I am able to > decode the audio data successfully, but no idea how the data is stored in > `AVFrame` `extended_data` pointer. The audio can be either stereo or mono. > > AVFrame *frame=av_frame_alloc(); > while(av_read_frame(container,&packet)>=0) > { > > int len=avcodec_decode_audio4(ctx,frame,&frameFinished,&packet); > frame->extended_data //how data stored inside the pointer > ........................ > } > _______________________________________________ > Libav-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/libav-user
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