OBS26添加自定义源采集分析

1.找到菜单

2.找到qmenu相关代码找到菜单代码

QString qname = QT_UTF8(name);
		QAction *popupItem = new QAction(qname, this);
		popupItem->setData(QT_UTF8(type));
		connect(popupItem, SIGNAL(triggered(bool)), this,
			SLOT(AddSourceFromAction()));

3.找到所有菜单回调事件AddSourceFromAction

void OBSBasic::AddSourceFromAction()
{
	QAction *action = qobject_cast<QAction *>(sender());
	if (!action)
		return;

	AddSource(QT_TO_UTF8(action->data().toString()));
}

获取推流的url

rtmp://hkg.contribute.live-video.net/app

推流key

live_669447722_e9f19k4TZx6RlyxHbGd1OUeubjOSBw

 推流函数

void OBSBasic::StartStreaming()
{
	if (outputHandler->StreamingActive())
		return;
	if (disableOutputsRef)
		return;

	if (!outputHandler->SetupStreaming(service)) {
		DisplayStreamStartError();
		return;
	}

	if (api)
		api->on_event(OBS_FRONTEND_EVENT_STREAMING_STARTING);

	SaveProject();

	ui->streamButton->setEnabled(false);
	ui->streamButton->setChecked(false);
	ui->streamButton->setText(QTStr("Basic.Main.Connecting"));

	if (sysTrayStream) {
		sysTrayStream->setEnabled(false);
		sysTrayStream->setText(ui->streamButton->text());
	}

	if (!outputHandler->StartStreaming(service)) {
		DisplayStreamStartError();
		return;
	}

	bool recordWhenStreaming = config_get_bool(
		GetGlobalConfig(), "BasicWindow", "RecordWhenStreaming");
	if (recordWhenStreaming)
		StartRecording();

	bool replayBufferWhileStreaming = config_get_bool(
		GetGlobalConfig(), "BasicWindow", "ReplayBufferWhileStreaming");
	if (replayBufferWhileStreaming)
		StartReplayBuffer();
}

安装输出流

inline void SimpleOutput::SetupOutputs()
{
	SimpleOutput::Update();
	obs_encoder_set_video(h264Streaming, obs_get_video());
	obs_encoder_set_audio(aacStreaming, obs_get_audio());
	obs_encoder_set_audio(aacArchive, obs_get_audio());

	if (usingRecordingPreset) {
		if (ffmpegOutput) {
			obs_output_set_media(fileOutput, obs_get_video(),
					     obs_get_audio());
		} else {
			obs_encoder_set_video(h264Recording, obs_get_video());
			obs_encoder_set_audio(aacRecording, obs_get_audio());
		}
	}
}

更新输出流参数

void SimpleOutput::Update()
{
	obs_data_t *h264Settings = obs_data_create();
	obs_data_t *aacSettings = obs_data_create();

    //6000
	int videoBitrate =
		config_get_uint(main->Config(), "SimpleOutput", "VBitrate");
	int audioBitrate = GetAudioBitrate();//160
    //false
	bool advanced =
		config_get_bool(main->Config(), "SimpleOutput", "UseAdvanced");
    //true
	bool enforceBitrate = !config_get_bool(main->Config(), "Stream1",
					       "IgnoreRecommended");
    //null
	const char *custom = config_get_string(main->Config(), "SimpleOutput",
					       "x264Settings");
    //"x264"
	const char *encoder = config_get_string(main->Config(), "SimpleOutput",
						"StreamEncoder");
    
	const char *presetType;
	const char *preset;

	if (strcmp(encoder, SIMPLE_ENCODER_QSV) == 0) {
		presetType = "QSVPreset";

	} else if (strcmp(encoder, SIMPLE_ENCODER_AMD) == 0) {
		presetType = "AMDPreset";
		UpdateStreamingSettings_amd(h264Settings, videoBitrate);

	} else if (strcmp(encoder, SIMPLE_ENCODER_NVENC) == 0) {
		presetType = "NVENCPreset";

	} else {
		presetType = "Preset";
	}
    //presetType="Preset"

    //"veryfast"
	preset = config_get_string(main->Config(), "SimpleOutput", presetType);

    
	obs_data_set_string(h264Settings, "rate_control", "CBR");
	obs_data_set_int(h264Settings, "bitrate", videoBitrate);

	if (advanced) {
		obs_data_set_string(h264Settings, "preset", preset);
		obs_data_set_string(h264Settings, "x264opts", custom);
	}

	obs_data_set_string(aacSettings, "rate_control", "CBR");
	obs_data_set_int(aacSettings, "bitrate", audioBitrate);

    //设置264的设置和aac的设置到rtmp协议服务
	obs_service_apply_encoder_settings(main->GetService(), h264Settings,
					   aacSettings);

	if (!enforceBitrate) {
		obs_data_set_int(h264Settings, "bitrate", videoBitrate);
		obs_data_set_int(aacSettings, "bitrate", audioBitrate);
	}

    //获取视频数据
	video_t *video = obs_get_video();
	enum video_format format = video_output_get_format(video);

	if (format != VIDEO_FORMAT_NV12 && format != VIDEO_FORMAT_I420)
		obs_encoder_set_preferred_video_format(h264Streaming,
						       VIDEO_FORMAT_NV12);

	obs_encoder_update(h264Streaming, h264Settings);
	obs_encoder_update(aacStreaming, aacSettings);
	obs_encoder_update(aacArchive, aacSettings);

	obs_data_release(h264Settings);
	obs_data_release(aacSettings);
}

void obs_service_apply_encoder_settings(obs_service_t *service,
					obs_data_t *video_encoder_settings,
					obs_data_t *audio_encoder_settings)
{
	if (!obs_service_valid(service, "obs_service_apply_encoder_settings"))
		return;
	if (!service->info.apply_encoder_settings)
		return;

	if (video_encoder_settings || audio_encoder_settings)
		service->info.apply_encoder_settings(service->context.data,
						     video_encoder_settings,
						     audio_encoder_settings);
}

设置参数

static void rtmp_common_apply_settings(void *data, obs_data_t *video_settings,
				       obs_data_t *audio_settings)
{
	struct rtmp_common *service = data;
	json_t *root = open_services_file();

	if (root) {
		initialize_output(service, root, video_settings,
				  audio_settings);
		json_decref(root);
	}
}

初始化services.json

static void initialize_output(struct rtmp_common *service, json_t *root,
			      obs_data_t *video_settings,
			      obs_data_t *audio_settings)
{
	json_t *json_service = find_service(root, service->service, NULL);
	json_t *recommended;

	if (!json_service) {
		if (service->service && *service->service)
			blog(LOG_WARNING,
			     "rtmp-common.c: [initialize_output] "
			     "Could not find service '%s'",
			     service->service);
		return;
	}

	recommended = json_object_get(json_service, "recommended");
	if (!recommended)
		return;

	if (video_settings)
		apply_video_encoder_settings(video_settings, recommended);
	if (audio_settings)
		apply_audio_encoder_settings(audio_settings, recommended);
}

获取视频数据

video_t *obs_get_video(void)
{
	return obs->video.video;
}

视频编码

void obs_encoder_set_video(obs_encoder_t *encoder, video_t *video)
{
	const struct video_output_info *voi;

	if (!obs_encoder_valid(encoder, "obs_encoder_set_video"))
		return;
	if (encoder->info.type != OBS_ENCODER_VIDEO) {
		blog(LOG_WARNING,
		     "obs_encoder_set_video: "
		     "encoder '%s' is not a video encoder",
		     obs_encoder_get_name(encoder));
		return;
	}
	if (!video)
		return;

	voi = video_output_get_info(video);

	encoder->media = video;
	encoder->timebase_num = voi->fps_den;
	encoder->timebase_den = voi->fps_num;
}

RTMP流设置

void
RTMP_Init(RTMP *r)
{
    memset(r, 0, sizeof(RTMP));
    r->m_sb.sb_socket = -1;
    RTMP_Reset(r);

#ifdef CRYPTO
    RTMP_TLS_Init(r);
#endif

}

void
RTMP_Reset(RTMP *r)
{
    r->m_inChunkSize = RTMP_DEFAULT_CHUNKSIZE;
    r->m_outChunkSize = RTMP_DEFAULT_CHUNKSIZE;
    r->m_bSendChunkSizeInfo = 1;
    r->m_nBufferMS = 30000;
    r->m_nClientBW = 2500000;
    r->m_nClientBW2 = 2;
    r->m_nServerBW = 2500000;
    r->m_fAudioCodecs = 3191.0;
    r->m_fVideoCodecs = 252.0;
    r->Link.curStreamIdx = 0;
    r->Link.nStreams = 0;
    r->Link.timeout = 30;
    r->Link.swfAge = 30;
}