Github
https://github.com/gongluck/FFmpeg4.0-study/tree/master/Cff
// 采集系统声音 void test_systemsound() { bool ret = false; std::string err; CDemux demux; CDecode decode; ret = demux.device_register_all(err); TESTCHECKRET(ret); ret = demux.set_input_format("dshow", err); //采集声卡 TESTCHECKRET(ret); ret = demux.set_dic_opt("framerate", "15", err); TESTCHECKRET(ret); ret = demux.set_demux_callback(DemuxSystemSoundCB, &decode, err); TESTCHECKRET(ret); ret = demux.set_demux_status_callback(DemuxStatusCB, &demux, err); TESTCHECKRET(ret); ret = demux.set_input("audio=virtual-audio-capturer", err); TESTCHECKRET(ret); ret = demux.openinput(err); TESTCHECKRET(ret); g_vindex = demux.get_steam_index(AVMEDIA_TYPE_VIDEO, err); std::cout << err << std::endl; g_aindex = demux.get_steam_index(AVMEDIA_TYPE_AUDIO, err); std::cout << err << std::endl; ret = decode.set_dec_callback(DecAudioFrameCB, &decode, err); TESTCHECKRET(ret); ret = decode.copy_param(demux.get_steam_par(g_aindex, err), err); TESTCHECKRET(ret); ret = decode.codec_open(err); TESTCHECKRET(ret); ret = demux.begindemux(err); TESTCHECKRET(ret); std::cout << "input to stop demuxing." << std::endl; std::cin.get(); ret = demux.stopdemux(err); TESTCHECKRET(ret); }
来源:https://www.cnblogs.com/gongluck/p/11142984.html