stream->time_base = AVRational{ 1, OUTPUT_FREQUENCY };
stream->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
stream->codecpar->codec_id = AV_CODEC_ID_PCM_S32LE;
stream->time_base = AVRational{ 1, OUTPUT_FREQUENCY };
stream->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
stream->codecpar->codec_id = AV_CODEC_ID_PCM_S32LE;