Linux平台如何实现采集音视频数据并注入轻量级RTSP服务？

/** nt_linux_smart_publisher_sdk.h* Created by daniusdk.com*//*+++rtsp server操作接口+++*//** 创建一个rtsp server * pRtspServerHandle: rtsp server 句柄* reserve：保留参数传0* 成功返回 NT_ERC_OK*/NT_UINT32(NT_API*OpenRtspServer)(NT_PHANDLEpRtspServerHandle, NT_INT32reserve);
/** 设置rtsp server 监听端口, 在StartRtspServer之前必须要设置端口* rtsp_server_handle: rtsp server 句柄* port: 端口号，可以设置为554,或者是1024到65535之间,其他值返回失败* 成功返回 NT_ERC_OK*/NT_UINT32(NT_API*SetRtspServerPort)(NT_HANDLErtsp_server_handle, NT_INT32port);
/** 设置rtsp server 鉴权用户名和密码, 这个可以不设置，只有需要鉴权的再设置* rtsp_server_handle: rtsp server 句柄* user_name: 用户名,必须是英文* password：密码,必须是英文* 成功返回 NT_ERC_OK*/NT_UINT32(NT_API*SetRtspServerUserNamePassword)(NT_HANDLErtsp_server_handle, NT_PCSTRuser_name, NT_PCSTRpassword);
/** 设置rtsp server 组播, 如果server设置成组播就不能单播，组播和单播只能选一个, 一般来说单播网络设备支持的好，wifi组播很多路由器不支持* rtsp_server_handle: rtsp server 句柄* is_multicast: 是否组播, 1为组播, 0为单播, 其他值接口返回错误, 默认是单播* 成功返回 NT_ERC_OK*/NT_UINT32(NT_API*SetRtspServerMulticast)(NT_HANDLErtsp_server_handle, NT_INT32is_multicast);
/** 设置rtsp server 组播组播地址 * rtsp_server_handle: rtsp server 句柄* multicast_address: 组播地址* 如果设置的不是组播地址, 将返回错误* 组播地址范围说明: [224.0.0.0, 224.0.0.255] 为组播预留地址, 不能设置. 可设置范围为[224.0.1.0, 239.255.255.255], 其中SSM地址范围为[232.0.0.0, 232.255.255.255]* 成功返回 NT_ERC_OK*/NT_UINT32(NT_API*SetRtspServerMulticastAddress)(NT_HANDLErtsp_server_handle, NT_PCSTRmulticast_address);
/** 获取rtsp server当前的客户会话数, 这个接口必须在StartRtspServer之后再调用* rtsp_server_handle: rtsp server 句柄* session_numbers: 会话数* 成功返回 NT_ERC_OK*/NT_UINT32(NT_API*GetRtspServerClientSessionNumbers)(NT_HANDLErtsp_server_handle, NT_INT32*session_numbers);
/** 启动rtsp server* rtsp_server_handle: rtsp server 句柄* reserve: 保留参数传0* 成功返回 NT_ERC_OK*/NT_UINT32(NT_API*StartRtspServer)(NT_HANDLErtsp_server_handle, NT_INT32reserve);
/** 停止rtsp server* rtsp_server_handle: rtsp server 句柄* 成功返回 NT_ERC_OK*/NT_UINT32(NT_API*StopRtspServer)(NT_HANDLErtsp_server_handle);
/** 关闭rtsp server* 调用这个接口之后rtsp_server_handle失效，* 成功返回 NT_ERC_OK*/NT_UINT32 (NT_API*CloseRtspServer)(NT_HANDLErtsp_server_handle);
/*---rtsp server操作接口---*/

/** nt_linux_smart_publisher_sdk.h* Created by daniusdk.com*//*+++发布rtsp流相关接口+++*//** 设置rtsp的流名称* stream_name: 流程名称，不能为空字符串，必须是英文* 这个作用是: 比如rtsp的url是:rtsp://192.168.0.111/test, test就是设置下去的stream_name* 成功返回 NT_ERC_OK*/NT_UINT32(NT_API*SetRtspStreamName)(NT_HANDLEhandle, NT_PCSTRstream_name);
/** 给要发布的rtsp流设置rtsp server, 一个流可以发布到多个rtsp server上，rtsp server的创建启动请参考OpenRtspServer和StartRtspServer接口* handle: 推送实例句柄* rtsp_server_handle：rtsp server句柄 * reserve： 保留参数，传0*/NT_UINT32(NT_API*AddRtspStreamServer)(NT_HANDLEhandle, NT_HANDLErtsp_server_handle, NT_INT32reserve);
/** 清除设置的rtsp server*/NT_UINT32(NT_API*ClearRtspStreamServer)(NT_HANDLEhandle);
/*启动rtsp流reserve: 保留参数，传0*/NT_UINT32(NT_API*StartRtspStream)(NT_HANDLEhandle, NT_INT32reserve);
/*停止rtsp流*/NT_UINT32(NT_API*StopRtspStream)(NT_HANDLEhandle);
/*---发布rtsp流相关接口---*/

NT_HANDLEstart_rtsp_server(NT_SmartPublisherSDKAPI*push_api, intport, std::stringuser_name, std::stringpassword) {
NT_HANDLErtsp_server_handle=nullptr;
if (NT_ERC_OK!=push_api->OpenRtspServer(&rtsp_server_handle, 0)) {
fprintf(stderr, "OpenRtspServer failed\n");
returnnullptr;
        }
if (nullptr==rtsp_server_handle) {
fprintf(stderr, "rtsp_server_handle is null\n");
returnnullptr;
        }
if (NT_ERC_OK!=push_api->SetRtspServerPort(rtsp_server_handle, port)) {
push_api->CloseRtspServer(rtsp_server_handle);
returnnullptr;
        }
if (!user_name.empty() &&!password.empty())
push_api->SetRtspServerUserNamePassword(rtsp_server_handle, user_name.c_str(), password.c_str());
if (NT_ERC_OK==push_api->StartRtspServer(rtsp_server_handle, 0))
returnrtsp_server_handle;
fprintf(stderr, "StartRtspServer failed\n");
push_api->CloseRtspServer(rtsp_server_handle);
returnnullptr;
    }

voidstop_rtsp_server(NT_SmartPublisherSDKAPI*push_api, NT_HANDLE&rtsp_server_handle) {
if (nullptr==rtsp_server_handle)
return;
NT_HANDLEhandle=rtsp_server_handle;
rtsp_server_handle=nullptr;
push_api->StopRtspServer(handle);
push_api->CloseRtspServer(handle);
    }

boolstart_rtsp_stream(NT_SmartPublisherSDKAPI*push_api, NT_HANDLErtsp_server_handle, NT_HANDLEhandle, conststd::stringstream_name) {
push_api->SetRtspStreamName(handle, stream_name.c_str());
push_api->ClearRtspStreamServer(handle);
push_api->AddRtspStreamServer(handle, rtsp_server_handle, 0);
if (NT_ERC_OK!=push_api->StartRtspStream(handle, 0))
returnfalse;
returntrue;
    }

stop_rtsp_server(&push_api, rtsp_server_handle);

// 开启预览，也可以不开启, 根据需求来push_api.SetPreviewXWindow(push_handle, "", sub_wid);
push_api.StartPreview(push_handle, 0, nullptr);