FFMPEG and MP3. How decode

How to decode mp3 audio using ffmpeg 开发者_StackOverflow中文版(using the API)? If not complicated - example code?

PS I went to open the file, find the audio channels. then I do not understand what to do ...

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It's nice to go all the way through the tutorials but this part of the tutorial deals with decoding audio (although I am currently having a problem with it as avcodec_decode_audio3() is the updated version of avcodec_decode_audio2()).

Hope it helps,

Infinitifizz