好多开发者一直苦恼于如何在IE浏览器环境下，构建低延迟的RTSP或RTMP播放，对于RTSP流来说，好多公司通常的做法是把RTSP转RTMP，然后分发到RTMP服务器，然后服务器转http-flv出来，浏览器直接播放http-flv流，亦或通过flash控件直接播放RTMP流，还有就是，转hls流出来，缺点是hls流延迟更大。

以上方案未尝不可，如果对播放体验和延迟要求更高，最简单的做法是直接在IE浏览器下加载activex控件。

大牛直播SDK（Github: https://github.com/daniulive/SmarterStreaming）在现有SDK的基础上，扩展了ocx控件，用于IE浏览器下的低延迟RTMP或RTSP播放，不谦虚的说，也可能是行业内功能支持和延迟最好的RTMP和RTSP播放器(支持RTMP/RTSP H.265(hevc)播放)。

页面展示

1. 功能齐全的单画面RTMP流或RTSP流播放：

2. 同时播放4路RTMP流或RTSP流画面：

本地播放和集成说明：

点我下载DEMO

本地播放

DEMO说明

1. 1_player_ocx.html：单个窗口功能展示。
2. 4_player_ocx.html：4窗口功能展示。
3. SmartPlayer.exe：cs架构播放器。

运行网页播放端之前，请确保以管理员权限注册ocx控件：regplayerocx.bat右键-->“以管理员身份运行(A)”，同理，反注册也是需要管理员身份。

注意：大牛直播RTSP/RTMP播放OCX控件只适用于微软IE浏览器。

对应封装接口

	ULONG NT_SetLogPath();ULONG NT_Open();ULONG NT_Close();ULONG NT_StartPlay();ULONG NT_StopPlay();ULONG NT_SetMute(LONG is_mute);ULONG NT_SetURL(LPCTSTR url);ULONG NT_SetBuffer(LONG buffer);ULONG NT_SetRTSPTcpMode(LONG isUsingTCP);ULONG NT_SetRtspTimeout(LONG timeout);ULONG NT_SetRtspAutoSwitchTcpUdp(LONG is_auto_switch_tcp_udp);ULONG NT_SetFastStartup(LONG isFastStartup);ULONG NT_SetLowLatencyMode(LONG mode);ULONG NT_SetFlipVertical(LONG is_flip);ULONG NT_SetFlipHorizontal(LONG is_flip);ULONG NT_SetRotation(LONG degress);ULONG NT_SwitchURL(LPCTSTR url);ULONG NT_SetCaptureImagePath(LPCTSTR path);ULONG NT_CaptureImage();ULONG NT_SetRecorderDirectory(LPCTSTR dir);ULONG NT_SetRecorderFileMaxSize(ULONG size);ULONG NT_NT_SP_RecorderFileNameRuler(ULONG type, LPCTSTR file_name_prefix, LONG append_date, LONG append_time);ULONG NT_SetRecorderAudioTranscodeAAC(LONG is_transcode);ULONG NT_SetRecorderVideo(LONG is_record_video);ULONG NT_SetRecorderAudio(LONG is_record_audio);ULONG NT_StartRecorder();ULONG NT_StopRecorder();ULONG NT_FullScreen();void OnSDKEventReceived(ULONG event_id, ULONG param1);void OnVideoSizeReceived(ULONG width, ULONG height);

设置LOG存放路径：

ULONG CSmartPlayerActiveXCtrl::NT_SetLogPath(LPCTSTR log_path)

请于NT_Open() 之前调用，代码示例：

var obj = document.getElementById("SmartPlayerActiveX");//如需记录log文件，请确保log路径存在, 如多级目录, 可按照"D:\\Daniulive\\log"类似格式设定, 记录文件名: smart_sdk.logobj.NT_SetLogPath("D:\\");

接口说明：

   1.  ULONG NT_Open();

打开player实例；
    2. ULONG NT_Close();

关闭player实例；
    3. ULONG NT_StartPlay();

开始播放；
    4. ULONG NT_StopPlay();

停止播放；
    5. ULONG NT_SetMute(LONG is_mute);

设置实时静音；
    6. ULONG NT_SetURL(LPCTSTR url);

设置播放的RTMP或RTSP url；
    7. ULONG NT_SetBuffer(LONG buffer);

设置buffer time，缓冲时间，单位：毫秒；
    8. ULONG NT_SetRTSPTcpMode(LONG isUsingTCP);

设置RTSP TCP/UDP播放模式；
    9. ULONG NT_SetRtspTimeout(LONG timeout);

设置RTSP超时时间；
    10. ULONG NT_SetRtspAutoSwitchTcpUdp(LONG is_auto_switch_tcp_udp);

设置是否自动切换TCP/UDP模式；
    11. ULONG NT_SetFastStartup(LONG isFastStartup);

设置是否快速启动；
    12. ULONG NT_SetLowLatencyMode(LONG mode);

设置是否低延迟模式播放；
    13. ULONG NT_SetFlipVertical(LONG is_flip);

设置垂直反转模式图像；
    14. ULONG NT_SetFlipHorizontal(LONG is_flip);

设置水平反转图像；
    15. ULONG NT_SetRotation(LONG degress);

设置旋转图像，可设定角度：0度 90度 180度 270度；
    16. ULONG NT_SwitchURL(LPCTSTR url);

设置快速切换RTSP/RTMP url；
    17. ULONG NT_SetCaptureImagePath(LPCTSTR path);

设置快照保存位置；
    18. ULONG NT_CaptureImage();

设置实时快照功能；
    19. ULONG NT_SetRecorderDirectory(LPCTSTR dir);

设置录像保存位置；
    20. ULONG NT_SetRecorderFileMaxSize(ULONG size);

设置单个录像文件最大size，单位：兆；
    21. ULONG NT_NT_SP_RecorderFileNameRuler(ULONG type, LPCTSTR file_name_prefix, LONG append_date, LONG append_time);

设置录像文件命名规则：是否需要前缀、是否添加日期、是否添加时间；
    22. ULONG NT_SetRecorderAudioTranscodeAAC(LONG is_transcode);

设置录像音频文件是否转AAC后录制，支持PCMA/PCMU/SPEEX转AAC后录制文件；
    23. ULONG NT_SetRecorderVideo(LONG is_record_video);

设置是否录制视频；
    24. ULONG NT_SetRecorderAudio(LONG is_record_audio);

设置是否录制音频；
    25. ULONG NT_StartRecorder();

开始录像；
    26. ULONG NT_StopRecorder();

停止录像；
    27. ULONG NT_FullScreen();

全屏显示窗口。

事件Event：    

1. void OnSDKEventReceived(ULONG event_id, ULONG param1);

回调网络状态、buffering状态、下载速度等；

事件类型：

<script>var NT_EVENT_ID_SMART_PLAYER_SDK = 0x01000000;var NT_SP_E_EVENT_ID_BASE = NT_EVENT_ID_SMART_PLAYER_SDK;var NT_SP_E_EVENT_ID_CONNECTING				= NT_SP_E_EVENT_ID_BASE | 0x2;	/*连接中*/var NT_SP_E_EVENT_ID_CONNECTION_FAILED		= NT_SP_E_EVENT_ID_BASE | 0x3;	/*连接失败*/var NT_SP_E_EVENT_ID_CONNECTED				= NT_SP_E_EVENT_ID_BASE | 0x4;	/*已连接*/var NT_SP_E_EVENT_ID_DISCONNECTED			= NT_SP_E_EVENT_ID_BASE | 0x5;	/*断开连接*/var NT_SP_E_EVENT_ID_NO_MEDIADATA_RECEIVED	= NT_SP_E_EVENT_ID_BASE | 0x8;	/*收不到RTMP数据*/var NT_SP_E_EVENT_ID_RTSP_STATUS_CODE       = NT_SP_E_EVENT_ID_BASE | 0xB;  /*rtsp status code上报, 目前只上报401, param1表示status code*//* 接下来请从0x81开始*/var NT_SP_E_EVENT_ID_START_BUFFERING = NT_SP_E_EVENT_ID_BASE | 0x81; /*开始缓冲*/var NT_SP_E_EVENT_ID_BUFFERING		 = NT_SP_E_EVENT_ID_BASE | 0x82; /*缓冲中, param1 表示百分比进度*/var NT_SP_E_EVENT_ID_STOP_BUFFERING  = NT_SP_E_EVENT_ID_BASE | 0x83; /*停止缓冲*/var NT_SP_E_EVENT_ID_DOWNLOAD_SPEED  = NT_SP_E_EVENT_ID_BASE | 0x91; /*下载速度， param1表示下载速度，单位是(Byte/s)*/var NT_SP_E_EVENT_ID_PLAYBACK_REACH_EOS		= NT_SP_E_EVENT_ID_BASE | 0xa1; /*播放结束, 直播流没有这个事件，点播流才有*/var NT_SP_E_EVENT_ID_RECORDER_REACH_EOS		= NT_SP_E_EVENT_ID_BASE | 0xa2; /*录像结束, 直播流没有这个事件, 点播流才有*/var NT_SP_E_EVENT_ID_PULLSTREAM_REACH_EOS   = NT_SP_E_EVENT_ID_BASE | 0xa3; /*拉流结束, 直播流没有这个事件，点播流才有*/var NT_SP_E_EVENT_ID_DURATION = NT_SP_E_EVENT_ID_BASE | 0xa8; /*视频时长，如果是直播，则不上报，如果是点播的话, 若能从视频源获取视频时长的话，则上报， param1表示视频时长，单位是毫秒(ms)*/
</script>

调用展示：

<script language='javascript' for="SmartPlayerActiveX"  event="OnSDKEventReceived(event_id, param1)">// Test 1 - statically load the script (This is the basis for the hack)// Works on IE8, IE9, IE10 and IE11var show_str = "";var connection_status = event_id;if (connection_status != 0){show_str += "链接状态: ";if (NT_SP_E_EVENT_ID_CONNECTING == connection_status){show_str += "链接中";}else if (NT_SP_E_EVENT_ID_CONNECTION_FAILED == connection_status){show_str += "链接失败";}else if (NT_SP_E_EVENT_ID_CONNECTED == connection_status){show_str += "链接成功";}else if (NT_SP_E_EVENT_ID_DISCONNECTED == connection_status){show_str += "链接断开";}else if (NT_SP_E_EVENT_ID_NO_MEDIADATA_RECEIVED == connection_status){show_str += "收不到数据";}}var download_speed = -1;if (NT_SP_E_EVENT_ID_DOWNLOAD_SPEED == event_id){download_speed = param1;}if (download_speed != -1){show_str += "下载速度:" + (download_speed * 8 / 1000).toFixed(0) + "kbps " + (download_speed / 1024).toFixed(0) + "KB/s";}var buffer_status = 0;if (NT_SP_E_EVENT_ID_START_BUFFERING == event_id|| NT_SP_E_EVENT_ID_BUFFERING == event_id|| NT_SP_E_EVENT_ID_STOP_BUFFERING == event_id){buffer_status = event_id;}if (buffer_status != 0){show_str += "缓冲状态: ";if (NT_SP_E_EVENT_ID_START_BUFFERING == buffer_status){show_str += "开始缓冲";}else if (NT_SP_E_EVENT_ID_BUFFERING == buffer_status){show_str += "缓冲中" + param1 + "%";}else if (NT_SP_E_EVENT_ID_STOP_BUFFERING == buffer_status){show_str += "结束缓冲";}}var EventMsgText = document.getElementById("EventMsg");EventMsgText.innerHTML = show_str;</script>

2. void OnVideoSizeReceived(ULONG width, ULONG height);

回调视频宽高信息。

调用展示：

<script language='javascript' for="SmartPlayerActiveX"  event="OnVideoSizeReceived(width, height)">// Test 1 - statically load the script (This is the basis for the hack)// Works on IE8, IE9, IE10 and IE11var VideoResolutionText = document.getElementById("VideoResolution");VideoResolutionText.innerHTML = width + "*" + height;
</script>

SDK接口调用实例：

播放和录像调用示例：

var is_player_opened = false;
var is_playing = false;
var is_recording = false;function OpenPlayer()
{			   if(is_player_opened){return;}var obj = document.getElementById("SmartPlayerActiveX");//如需记录log文件，请确保log路径存在, 如多级目录, 可按照"D:\\Daniulive\\log"类似格式设定, 记录文件名: smart_sdk.logobj.NT_SetLogPath("D:\\");var ret = obj.NT_Open();if(ret == 0){   //设置TCP/UDP模式var rtsp_tcp_mode = document.getElementById("rtspTcpMode").checked ? 1 : 0;obj.NT_SetRTSPTcpMode(rtsp_tcp_mode);//设置RTSP超时时间var rtsp_timeout = document.getElementById("rtspTimeout").value;obj.NT_SetRtspTimeout(rtsp_timeout);//设置是否自动切换TCP-UDP模式var rtsp_auto_switch_tcp_udp = document.getElementById("rtspAutoSwitchTcpUdp").checked ? 1 : 0;obj.NT_SetRtspAutoSwitchTcpUdp(rtsp_auto_switch_tcp_udp);//设置是否快速启动var fast_startup_mode = document.getElementById("fastStartupMode").checked ? 1 : 0;obj.NT_SetFastStartup(fast_startup_mode);//设置需要播放或录像的RTSP/RTMP urlvar url = document.getElementById("playorReocordUrl").value;obj.NT_SetURL(url);//设置实时截图路径(可自行设置或选取系统存在的文件夹), 如多级目录可按照"D:\\Daniulive\\image"类似格式设定//var image_path = "D:\\";obj.NT_SetCaptureImagePath(image_path);is_player_opened = true;}
}function ClosePlayer()
{if(is_player_opened){var obj = document.getElementById("SmartPlayerActiveX");obj.NT_Close();var EventMsgText = document.getElementById("EventMsg");	EventMsgText.innerHTML = "";is_player_opened = false;}
}function OnBnClickedPlay()
{if(!isIE()){alert("非IE浏览器，请用IE打开播放控件..");return;}if(!isActiveXInstalled()){alert("控件未加载，请先加载控件..");return;}if(is_playing){StopPlayback();}else{StartPlayback();}
}//开始播放
function StartPlayback() {if(!is_playing && !is_recording){OpenPlayer();}var obj = document.getElementById("SmartPlayerActiveX");//设置是否启用低延迟模式var low_latency_mode = document.getElementById("lowlatencyMode").checked ? 1 : 0;obj.NT_SetLowLatencyMode(low_latency_mode);//设置缓冲时间var buffer_time = document.getElementById("bufferTime").value;obj.NT_SetBuffer(buffer_time);var ret = obj.NT_StartPlay();if(ret == 0){is_playing = true;	var playBtnText = document.getElementById("playBtn");playBtnText.innerHTML = "停止播放";}		
}//停止播放
function StopPlayback() {if(!is_playing){return;}var obj = document.getElementById("SmartPlayerActiveX");obj.NT_StopPlay();is_playing = false;var playBtnText = document.getElementById("playBtn");playBtnText.innerHTML = "开始播放";if(!is_recording){ClosePlayer();}var VideoResolutionText = document.getElementById("VideoResolution");VideoResolutionText.innerHTML = "";
}function OnBnClickedRecord()
{if(!isIE()){alert("非IE浏览器，请用IE打开播放控件..");return;}if(!isActiveXInstalled()){alert("控件未加载，请先加载控件..");return;}if(is_recording){StopRecorder();}else{StartRecorder();}
}//开始录像
function StartRecorder() {if(!is_playing && !is_recording){OpenPlayer();}var obj = document.getElementById("SmartPlayerActiveX");//设置实时录像存放路径(可自行设置或选取系统存在的文件夹), 如多级目录可按照"D:\\Daniulive\\rec"类似格式设定var rec_dir = "D:\\";obj.NT_SetRecorderDirectory(rec_dir);var rec_max_size = 200;obj.NT_SetRecorderFileMaxSize(rec_max_size);var type = 0;var file_name_prefix = "daniulive";var append_date = 1;var append_time = 1;obj.NT_NT_SP_RecorderFileNameRuler(type, file_name_prefix, append_date, append_time);var is_transcode = 1;obj.NT_SetRecorderAudioTranscodeAAC(is_transcode);var is_record_video = 1;obj.NT_SetRecorderVideo(is_record_video);var is_record_audio = 1;obj.NT_SetRecorderAudio(is_record_audio);var ret = obj.NT_StartRecorder();if(ret == 0){is_recording = true;var recordBtnText = document.getElementById("recordBtn");recordBtnText.innerHTML = "停止录像";}
}//停止录像
function StopRecorder() {if(!is_recording){return;}var obj = document.getElementById("SmartPlayerActiveX");obj.NT_StopRecorder();is_recording = false;var recordBtnText = document.getElementById("recordBtn");recordBtnText.innerHTML = "开始录像";if(!is_playing){ClosePlayer();}
}

快速切换URL调用示例：

//快速切换播放URL
function SwitchUrl() {if(!is_playing){return;}var obj = document.getElementById("SmartPlayerActiveX");var switch_url = document.getElementById("playorReocordUrl").value;obj.NT_SwitchURL(switch_url);
}

实时静音调用示例：

//实时静音
var is_mute = 1;	
function SetMute() {var obj = document.getElementById("SmartPlayerActiveX");obj.NT_SetMute(is_mute);var muteText = document.getElementById("MuteBtn");if(is_mute == 1 ){is_mute = 0;muteText.innerHTML = "取消静音";}else{is_mute = 1;muteText.innerHTML  = "实时静音";}
}

视频view垂直反转、水平反转、旋转调用示例：

//垂直反转
var is_flip_vertical = 1;
function SetFlipVertical() {var obj = document.getElementById("SmartPlayerActiveX");obj.NT_SetFlipVertical(is_flip_vertical);var flipVerticalText = document.getElementById("FlipVerticalBtn");if(is_flip_vertical == 1 ){is_flip_vertical = 0;flipVerticalText.innerHTML = "取消反转";}else{is_flip_vertical = 1;flipVerticalText.innerHTML  = "垂直反转";}
}//水平反转
var is_flip_horizontal = 1;
function SetFlipHorizontal() {var obj = document.getElementById("SmartPlayerActiveX");obj.NT_SetFlipHorizontal(is_flip_horizontal);var flipHorizontalText = document.getElementById("FlipHorizontalBtn");if(is_flip_horizontal == 1 ){is_flip_horizontal = 0;flipHorizontalText.innerHTML = "取消反转";}else{is_flip_horizontal = 1;flipHorizontalText.innerHTML  = "水平反转";}
}//视频view旋转
var rotate_degrees_ = 0;
function SetRotation() {rotate_degrees_ += 90;rotate_degrees_ = rotate_degrees_ % 360;var obj = document.getElementById("SmartPlayerActiveX");obj.NT_SetRotation(rotate_degrees_);var rotateText = document.getElementById("RotateBtn");if (0 == rotate_degrees_){rotateText.innerHTML = "旋转90度";}else if (90 == rotate_degrees_){rotateText.innerHTML = "旋转180度";}else if (180 == rotate_degrees_){rotateText.innerHTML = "旋转270度";}else if (270 == rotate_degrees_){rotateText.innerHTML = "不旋转";}
}

实时截图调用示例：

function CaptureImage() {var obj = document.getElementById("SmartPlayerActiveX");obj.NT_CaptureImage();
}

全屏显示窗口调用示例：

//全屏显示窗口
function FullScreen() {var obj = document.getElementById("SmartPlayerActiveX");obj.NT_FullScreen();
}