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我们在对接Unity平台camera场景采集的时候#xff0c;除了常规的RTMP推送、录像外#xff0c;还有一些开发者#xff0c;需要能实现轻量级RTSP服务#xff0c;对外提供个拉流的RTSP URL。
目前我们在Windows平台Unity下数据源可采集到以下部分#xff1a;
采集…技术背景
我们在对接Unity平台camera场景采集的时候除了常规的RTMP推送、录像外还有一些开发者需要能实现轻量级RTSP服务对外提供个拉流的RTSP URL。
目前我们在Windows平台Unity下数据源可采集到以下部分
采集Unity camera场景采集摄像头采集屏幕采集Unity声音采集麦克风采集扬声器Unity PCM混音
对外提供的技术能力有
RTMP直播推送轻量级RTSP服务实时录像、暂停|恢复录像实时预览。
以下录制下来的MP4文件是采集Unity camera场景音频是unity声音。 Unity平台实现camera场景实时录像 技术实现
实际上在实现Unity平台音视频能力之前我们原生模块已经有非常成熟的技术积累Unity下还是调用的原生的推送模块不同的是数据源需要采集Unity的audio、video然后高效的投递到底层模块底层模块负责编码打包并投递到RTMP或RTSP服务。 先说支持的音视频类型 public void SelVideoPushType(int type){switch (type){case 0:video_push_type_ (uint)NTSmartPublisherDefine.NT_PB_E_VIDEO_OPTION.NT_PB_E_VIDEO_OPTION_LAYER; //采集Unity窗体break;case 1:video_push_type_ (uint)NTSmartPublisherDefine.NT_PB_E_VIDEO_OPTION.NT_PB_E_VIDEO_OPTION_CAMERA; //采集摄像头break;case 2:video_push_type_ (uint)NTSmartPublisherDefine.NT_PB_E_VIDEO_OPTION.NT_PB_E_VIDEO_OPTION_SCREEN; //采集屏幕break;case 3:video_push_type_ (uint)NTSmartPublisherDefine.NT_PB_E_VIDEO_OPTION.NT_PB_E_VIDEO_OPTION_NO_VIDEO; //不采集视频break;}Debug.Log(SelVideoPushType type: type video_push_type: video_push_type_);}public void SelAudioPushType(int type){switch (type){case 0:audio_push_type_ (uint)NTSmartPublisherDefine.NT_PB_E_AUDIO_OPTION.NT_PB_E_AUDIO_OPTION_EXTERNAL_PCM_DATA; //采集Unity声音break;case 1:audio_push_type_ (uint)NTSmartPublisherDefine.NT_PB_E_AUDIO_OPTION.NT_PB_E_AUDIO_OPTION_CAPTURE_MIC; //采集麦克风break;case 2:audio_push_type_ (uint)NTSmartPublisherDefine.NT_PB_E_AUDIO_OPTION.NT_PB_E_AUDIO_OPTION_CAPTURE_SPEAKER; //采集扬声器break;case 3:audio_push_type_ (uint)NTSmartPublisherDefine.NT_PB_E_AUDIO_OPTION.NT_PB_E_AUDIO_OPTION_TWO_EXTERNAL_PCM_MIXER; //两路Unity AudioClip混音测试break;case 4:audio_push_type_ (uint)NTSmartPublisherDefine.NT_PB_E_AUDIO_OPTION.NT_PB_E_AUDIO_OPTION_NO_AUDIO; //不采集音频break;}Debug.Log(SelAudioPushType type: type audio_push_type: audio_push_type_);}
采集音视频数据 private void StartCaptureAvData(){if (audio_push_type_ (uint)NTSmartPublisherDefine.NT_PB_E_AUDIO_OPTION.NT_PB_E_AUDIO_OPTION_EXTERNAL_PCM_DATA|| audio_push_type_ (uint)NTSmartPublisherDefine.NT_PB_E_AUDIO_OPTION.NT_PB_E_AUDIO_OPTION_TWO_EXTERNAL_PCM_MIXER){PostUnityAudioClipData();}textures_poll_ new TexturesPool();post_image_worker_ new PostImageWorker(textures_poll_, publisher_wrapper_);post_worker_thread_ new Thread(post_image_worker_.run);post_worker_thread_.Start();}private void StopCaptureAvData(){if (post_image_worker_ ! null){post_image_worker_.requestStop();post_image_worker_ null;}if (post_worker_thread_ ! null){post_worker_thread_.Join();post_worker_thread_ null;}if (textures_poll_ ! null){textures_poll_.clear();textures_poll_ null;}StopAudioSource();}
RTMP推送 public void btn_start_rtmp_pusher_Click(){if (publisher_wrapper_.IsPushingRtmp()){StopPushRTMP();btn_rtmp_pusher_.GetComponentInChildrenText().text 推送RTMP;return;}String url rtmp_pusher_url_.text;if (url.Length 8){publisher_wrapper_.Close();Debug.LogError(请输入RTMP推送地址);return;}if (!publisher_wrapper_.IsPreviewing() !publisher_wrapper_.IsRtspPublisherRunning() !publisher_wrapper_.IsRecording()){publisher_wrapper_.SetVideoPushType(video_push_type_);publisher_wrapper_.SetAudioPushType(audio_push_type_);}if (!publisher_wrapper_.StartRtmpPusher(url)){Debug.LogError(调用StartPublisher失败..);return;}btn_rtmp_pusher_.GetComponentInChildrenText().text 停止推送;if (!publisher_wrapper_.IsPreviewing() !publisher_wrapper_.IsRtspPublisherRunning() !publisher_wrapper_.IsRecording()){StartCaptureAvData();coroutine_ StartCoroutine(OnPostVideo());}}
轻量级RTSP服务相关调用 public void btn_rtsp_service_Click(){if (publisher_wrapper_.IsRtspServiceRunning()){publisher_wrapper_.StopRtspService();btn_rtsp_service_.GetComponentInChildrenText().text 启动RTSP服务;btn_rtsp_publisher_.interactable false;return;}if (!publisher_wrapper_.StartRtspService()){Debug.LogError(调用StartRtspService失败..);return;}btn_rtsp_publisher_.interactable true;btn_rtsp_service_.GetComponentInChildrenText().text 停止RTSP服务;}public void btn_rtsp_publisher_Click(){if (publisher_wrapper_.IsRtspPublisherRunning()){publisher_wrapper_.StopRtspStream();if (!publisher_wrapper_.IsPreviewing() !publisher_wrapper_.IsPushingRtmp() !publisher_wrapper_.IsRecording()){StopCaptureAvData();if (coroutine_ ! null){StopCoroutine(coroutine_);coroutine_ null;}}btn_rtsp_service_.interactable true;btn_rtsp_publisher_.GetComponentInChildrenText().text 发布RTSP;}else{if (!publisher_wrapper_.IsRtspServiceRunning()){Debug.LogError(RTSP service is not running..);return;}if (!publisher_wrapper_.IsPreviewing() !publisher_wrapper_.IsPushingRtmp() !publisher_wrapper_.IsRecording()){publisher_wrapper_.SetVideoPushType(video_push_type_);publisher_wrapper_.SetAudioPushType(audio_push_type_);}publisher_wrapper_.StartRtspStream();if (!publisher_wrapper_.IsPreviewing() !publisher_wrapper_.IsPushingRtmp() !publisher_wrapper_.IsRecording()){StartCaptureAvData();coroutine_ StartCoroutine(OnPostVideo());}btn_rtsp_publisher_.GetComponentInChildrenText().text 停止RTSP;btn_rtsp_service_.interactable false;}}public void btn_get_rtsp_session_numbers_Click(){if (publisher_wrapper_.IsRtspServiceRunning()){btn_get_rtsp_session_numbers_.GetComponentInChildrenText().text RTSP会话数: publisher_wrapper_.GetRtspSessionNumbers();}}
实时录像调用 public void btn_record_Click(){if (publisher_wrapper_.IsRecording()){StopRecord();btn_record_.GetComponentInChildrenText().text 开始录像;return;}if (!publisher_wrapper_.IsPreviewing() !publisher_wrapper_.IsRtspPublisherRunning() !publisher_wrapper_.IsPushingRtmp()){publisher_wrapper_.SetVideoPushType(video_push_type_);publisher_wrapper_.SetAudioPushType(audio_push_type_);}if (!publisher_wrapper_.StartRecorder()){Debug.LogError(调用StartRecorder失败..);return;}btn_record_.GetComponentInChildrenText().text 停止录像;if (!publisher_wrapper_.IsPreviewing() !publisher_wrapper_.IsRtspPublisherRunning() !publisher_wrapper_.IsPushingRtmp()){StartCaptureAvData();coroutine_ StartCoroutine(OnPostVideo());}}public void StopRecord(){if (!publisher_wrapper_.IsPreviewing() !publisher_wrapper_.IsRtspPublisherRunning() !publisher_wrapper_.IsPushingRtmp()){StopCaptureAvData();if (coroutine_ ! null){StopCoroutine(coroutine_);coroutine_ null;}}publisher_wrapper_.StopRecorder();}private void btn_pause_record_Click(){if (!publisher_wrapper_.IsPublisherHandleAvailable()){return;}String btn_pause_rec_text btn_pause_record_.GetComponentInChildrenText().text;if (暂停录像 btn_pause_rec_text){UInt32 ret publisher_wrapper_.PauseRecorder(true);if ((UInt32)NT.NTSmartPublisherDefine.NT_PB_E_ERROR_CODE.NT_ERC_PB_NEED_RETRY ret){Debug.LogError(暂停录像失败, 请重新尝试!);return;}else if (NTBaseCodeDefine.NT_ERC_OK ret){btn_pause_record_.GetComponentInChildrenText().text 恢复录像;}}else{UInt32 ret publisher_wrapper_.PauseRecorder(false);if ((UInt32)NT.NTSmartPublisherDefine.NT_PB_E_ERROR_CODE.NT_ERC_PB_NEED_RETRY ret){Debug.LogError(恢复录像失败, 请重新尝试!);return;}else if (NTBaseCodeDefine.NT_ERC_OK ret){btn_pause_record_.GetComponentInChildrenText().text 暂停录像;}}}
实时预览相关 public void btn_preview_Click(){if (btn_preview_.GetComponentInChildrenText().text.Equals(本地预览)){if (!publisher_wrapper_.IsPushingRtmp() !publisher_wrapper_.IsRtspPublisherRunning() !publisher_wrapper_.IsRecording()){publisher_wrapper_.SetVideoPushType(video_push_type_);}if (publisher_wrapper_.StartPreview()){btn_preview_.GetComponentInChildrenText().text 停止预览;}if (!publisher_wrapper_.IsPushingRtmp() !publisher_wrapper_.IsRtspPublisherRunning() !publisher_wrapper_.IsRecording()){StartCaptureAvData();coroutine_ StartCoroutine(OnPostVideo());}}else{if (!publisher_wrapper_.IsPushingRtmp() !publisher_wrapper_.IsRtspPublisherRunning() !publisher_wrapper_.IsRecording()){StopCaptureAvData();if (coroutine_ ! null){StopCoroutine(coroutine_);coroutine_ null;}}publisher_wrapper_.StopPreview();btn_preview_.GetComponentInChildrenText().text 本地预览;}}
总结
Unity平台下RTMP推送、录像、轻量级RTSP服务在虚拟仿真、医疗、教育等场景下应用非常广泛。要实现低延迟除了需要高效率的音视频数据采集编码和数据投递外还需要好的直播播放器支持。配合我们的SmartPlayer可轻松实现毫秒级体验满足绝大多数应用场景技术诉求。
