AVSampleFormat audio_sample_format (std::shared_ptr<FFmpegAudioStream> stream) const;
int bytes_per_audio_sample (std::shared_ptr<FFmpegAudioStream> stream) const;
AVSampleFormat audio_sample_format (std::shared_ptr<FFmpegAudioStream> stream) const;
int bytes_per_audio_sample (std::shared_ptr<FFmpegAudioStream> stream) const;