decode an audio frame ( AVFrame) from the the audio packet ( AVPacket) using decoder context ( AVCodecContext).read an audio packet ( AVPacket) from the input file ( AVFormatContext).initialize the swresample context ( SwrContext) that will convert from decoder output to our PCM format and perform resampling if necessary.initialize the decoder context ( AVCodecContext) for the decoder ( AVCodec).find a decoder ( AVCodec) for the audio stream.open the input file context ( AVFormatContext) and look for an audio stream in it. ![]() This snippet decodes a file using FFmpeg (with automatic resampling and channel mapping). ffmpeg_playīelow you can find a brief description of every snippet and some side notes. Since all snippets use the same sample format and use stdin or stdout, any decoder may be combined with any player via a pipe, for example: $. players demonstrate sending the raw PCM samples to the sound card.decoders demonstrate reading an audio file and decoding raw PCM samples from it. ![]() The source code is available on GitHub here and there.Įach snippet is a small program. I was playing with various media libraries recently and have prepared several snippets demonstrating how one can decode and play an audio file in two separate steps.
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