README.md · 码客说/srs

# Simple-RTMP-Server

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[![Wechat](https://cloud.githubusercontent.com/assets/2777660/22814959/c51cbe72-ef92-11e6-81cc-32b657b285d5.png)](https://github.com/ossrs/srs/wiki/v1_CN_Contact#wechat)
[<img width="52" alt="Skype" src="https://cloud.githubusercontent.com/assets/2777660/24329166/3821a328-1230-11e7-844a-506a5d17dd3d.png">](https://github.com/ossrs/srs/wiki/v1_EN_Contact#skype-or-gitter)

SRS/2.0, [ZhouGuowen][release2]

SRS定位是运营级的互联网直播服务器集群，追求更好的概念完整性和最简单实现的代码。 
SRS is an industrial-strength live streaming cluster, with the best conceptual integrity and the simplest implementation.

Download from github.io: [Centos6-x86_64][centos0], [more...][more0] 
Download from ossrs.net: [Centos6-x86_64][centos1], [more...][more1] 
Website for SRS/2.0, read SRS 2.0 [Chinese][srs_CN] or [English][srs_EN].

## Why SRS?

1. We completely rewrote HLS following m3u8/ts spec, and HLS support h.264+aac/mp3.
1. Highly efficient RTMP streaming, supporting 7k+ clients concurrency, vhost based, both origin and edge.
1. Embedded simplified media HTTP server for HLS, api and HTTP flv/ts/mp3/aac streaming.
1. Variety input: RTMP, pull by ingest file or stream(HTTP/RTMP/RTSP), push by stream caster 
RTSP/MPEGTS-over-UDP.
1. Popular internet delivery: RTMP/HDS for flash, HLS for mobile(IOS/IPad/MAC/Android), HTTP 
flv/ts/mp3/aac streaming for user prefered.
1. Enhanced DVR and hstrs: segment/session/append plan, customer path and HTTP callback.
the hstrs(http stream trigger rtmp source) enable the http-flv stream standby util encoder 
start publish, similar to rtmp, which will trigger edge to fetch from origin.
1. Multiple feature: transcode, forward, ingest, http hooks, dvr, hls, rtsp, http streaming, 
http api, refer, log, bandwith test and srs-librtmp.
1. Best maintainess: simple arch over state-threads(coroutine), single thread, single process 
and for linux/osx platform, common server x86-64/i386/arm/mips cpus, rich comments, strictly 
follows RTMP/HLS/RTSP spec.
1. Easy to use: both English and Chinese wiki, typically config files in trunk/conf, traceable 
and session based log, linux service script and install script.
1. MIT license, open source with product management and evolution.

Enjoy it!

## About

SRS(Simple RTMP Server) over state-threads created on 2013.10.

SRS delivers rtmp/hls/http/hds live on x86/x64/arm/mips linux/osx, 
supports origin/edge/vhost and transcode/ingest and dvr/forward 
and http-api/http-callback/reload, introduces tracable 
session-oriented log, exports client srs-librtmp, 
with stream caster to push MPEGTS-over-UDP/RTSP to SRS,
provides EN/CN wiki and the most simple architecture.

## AUTHORS

There are two types of people that have contributed to the SRS project:
* AUTHORS: Contribute important features. Names of all 
PRIMARY response in NetConnection.connect and metadata. 
* CONTRIBUTORS: Submit patches, report bugs, add translations, help answer 
newbie questions, and generally make SRS that much better.

About all PRIMARY, AUTHORS and CONTRIBUTORS, read [AUTHORS.txt][authors].

A big THANK YOU goes to:
* All friends of SRS for [big supports][bigthanks].
* Genes amd Mabbott for creating [st][st]([state-threads][st2]).
* Michael Talyanksy for introducing us to use st.
* Roman Arutyunyan for creating [nginx-rtmp][nginx-rtmp] for SRS to refer to. 
* Joyent for creating [http-parser][http-parser] for http-api for SRS.
* Igor Sysoev for creating [nginx][nginx] for SRS to refer to.
* [FFMPEG][FFMPEG] and [libx264][libx264] group for SRS to use to transcode.
* Guido van Rossum for creating Python for api-server for SRS.

## Mirrors

Github: [https://github.com/ossrs/srs][srs], the GIT usage([CN][v1_CN_Git], [EN][v1_EN_Git])

```
git clone https://github.com/ossrs/srs.git
```

OSChina: [http://git.oschina.net/winlinvip/srs.oschina][oschina], the GIT usage([CN][v1_CN_Git], [EN][v1_EN_Git])

```
git clone https://git.oschina.net/winlinvip/srs.oschina.git
```

Gitlab: [https://gitlab.com/winlinvip/srs-gitlab][gitlab], the GIT usage([CN][v1_CN_Git], [EN][v1_EN_Git])

```
git clone https://gitlab.com/winlinvip/srs-gitlab.git
```

## Usage

Step 1: get SRS

<pre>
git clone https://github.com/ossrs/srs &&
cd srs/trunk
</pre>

Step 2: build SRS,
Requires Centos6.x/Ubuntu12 32/64bits, for others OS recommend [docker][docker], see Build([CN][v2_CN_Build],[EN][v2_EN_Build]).

<pre>
./configure && make
</pre>

Step 3: start SRS

See also:
* Usage: How to delivery RTMP?([CN][v1_CN_SampleRTMP], [EN][v1_EN_SampleRTMP])
* Usage: How to delivery RTMP Cluster?([CN][v1_CN_SampleRTMPCluster], [EN][v1_EN_SampleRTMPCluster])
* Usage: How to delivery HTTP FLV Live Streaming?([CN][v2_CN_SampleHttpFlv], [EN][v2_EN_SampleHttpFlv])
* Usage: How to delivery HTTP FLV Live Streaming Cluster?([CN][v2_CN_SampleHttpFlvCluster], [EN][v2_EN_SampleHttpFlvCluster])
* Usage: How to delivery HLS?([CN][v2_CN_SampleHLS], [EN][v2_EN_SampleHLS])
* Usage: How to delivery HLS for other codec?([CN][v2_CN_SampleTranscode2HLS], [EN][v2_EN_SampleTranscode2HLS])
* Usage: How to transode RTMP stream by SRS?([CN][v2_CN_SampleFFMPEG], [EN][v2_EN_SampleFFMPEG])
* Usage: How to forward stream to other server?([CN][v1_CN_SampleForward], [EN][v1_EN_SampleForward])
* Usage: How to deploy low lantency application?([CN][v2_CN_SampleRealtime], [EN][v2_EN_SampleRealtime])
* Usage: How to deploy SRS on ARM?([CN][v1_CN_SampleARM], [EN][v1_EN_SampleARM])
* Usage: How to ingest file/stream/device to SRS?([CN][v1_CN_SampleIngest], [EN][v1_EN_SampleIngest])
* Usage: How to use SRS-HTTP-server to delivery HTTP/HLS stream?([CN][v2_CN_SampleHTTP], [EN][v2_EN_SampleHTTP])
* Usage: How to show the demo of ([CN][v1_CN_SampleDemo], [EN][v1_EN_SampleDemo])
* Usage: How to publish h.264 raw stream to [CN][v2_CN_SrsLibrtmp2], [EN][v2_EN_SrsLibrtmp2])
* Usage: Solution using SRS?([CN][v1_CN_Sample], [EN][v1_EN_Sample])
* Usage: Why SRS?([CN][v1_CN_Product], [EN][v1_EN_Product])

## Wiki

SRS 1.0 wiki

Please select your language:
* [SRS 1.0 English][v1_EN_Home]
* [SRS 1.0 Chinese][v1_CN_Home]

SRS 2.0 wiki

Please select your language:
* [SRS 2.0 English][v2_EN_Home]
* [SRS 2.0 Chinese][v2_CN_Home]

## System Requirements
Supported operating systems and hardware:
* All Linux , both 32 and 64 bits
* Apple OSX(Darwin), both 32 and 64bits.
* All hardware with x86/x86_64/arm/mips cpu.

## Features

1. Simple, also stable enough.
1. High-performance([CN][v1_CN_Performance], [EN][v1_EN_Performance]): single-thread, async socket, event/st-thread driven.
1. High-concurrency([CN][v1_CN_Performance], [EN][v1_EN_Performance]), 6000+ connections(500kbps), 900Mbps, CPU 90.2%, 41MB
1. Support RTMP Origin Server([CN][v1_CN_DeliveryRTMP],[EN][v1_EN_DeliveryRTMP])
1. Support RTMP Edge Server([CN][v2_CN_Edge], [EN][v2_EN_Edge]) for CDN, push/pull stream from any RTMP server
1. Support single process; no multiple processes.
1. Support Vhost([CN][v1_CN_RtmpUrlVhost], [EN][v1_EN_RtmpUrlVhost]), support \_\_defaultVhost\_\_.
1. Support RTMP([CN][v1_CN_DeliveryRTMP], [EN][v1_EN_DeliveryRTMP]) live streaming; no vod streaming.
1. Support Apple HLS(m3u8)([CN][v2_CN_DeliveryHLS], [EN][v2_EN_DeliveryHLS]) live streaming.
1. Support HLS audio-only([CN][v2_CN_DeliveryHLS2], [EN][v2_EN_DeliveryHLS2]) live streaming.
1. Support Reload([CN][v1_CN_Reload], [EN][v1_EN_Reload]) config to enable changes.
1. Support cache last gop([CN][v2_CN_LowLatency2], [EN][v2_EN_LowLatency2]) for flash player to fast startup.
1. Support listen at multiple ports.
1. Support long time(>4.6hours) publish/play.
1. Support Forward([CN][v1_CN_Forward], [EN][v1_EN_Forward]) in master-slave mode.
1. Support live stream Transcoding([CN][v2_CN_FFMPEG], [EN][v2_EN_FFMPEG]) by ffmpeg.
1. Support ffmpeg([CN][v2_CN_FFMPEG], [EN][v2_EN_FFMPEG]) filters(logo/overlay/crop), x264 params, copy/vn/an.
1. Support audio transcode([CN][v2_CN_FFMPEG], [EN][v2_EN_FFMPEG]) only, speex/mp3 to aac
1. Support http callback api hooks([CN][v2_CN_HTTPCallback], [EN][v2_EN_HTTPCallback])(for authentication and injection).
1. Support bandwidth test([CN][v1_CN_BandwidthTestTool], [EN][v1_EN_BandwidthTestTool]) api and flash client.
1. Player, publisher(encoder), and demo pages(jquery+bootstrap)([CN][v1_CN_SampleDemo],[EN][v1_EN_SampleDemo]). 
1. Demo([CN][v1_CN_SampleDemo], [EN][v1_EN_SampleDemo]) video meeting or chat(SRS+cherrypy+jquery+bootstrap). 
1. Full documents in wiki([CN][v2_CN_Home], [EN][v2_EN_Home]), both Chinese and English. 
1. Support RTMP(play-publish) library: srs-librtmp([CN][v2_CN_SrsLibrtmp], [EN][v2_EN_SrsLibrtmp])
1. Support ARM cpu arch([CN][v1_CN_SrsLinuxArm], [EN][v1_EN_SrsLinuxArm]) with rtmp/ssl/hls/librtmp.
1. Support init.d([CN][v1_CN_LinuxService], [EN][v1_EN_LinuxService]) and packge script, log to file. 
1. Support RTMP ATC([CN][v1_CN_RTMP-ATC], [EN][v1_EN_RTMP-ATC]) for HLS/HDS to support backup(failover)
1. Support HTTP RESTful management api([CN][v2_CN_HTTPApi], [EN][v2_EN_HTTPApi]).
1. Support Ingest([CN][v1_CN_Ingest], [EN][v1_EN_Ingest]) FILE/HTTP/RTMP/RTSP(RTP, SDP) to RTMP using external tools(e.g ffmepg).
1. Support DVR([CN][v2_CN_DVR], [EN][v2_EN_DVR]), record live to flv file for vod.
1. Support tracable log, session based log([CN][v1_CN_SrsLog], [EN][v1_EN_SrsLog]).
1. Support DRM token traverse([CN][v1_CN_DRM2], [EN][v1_EN_DRM2]) for fms origin authenticate.
1. Support system full utest on gtest.
1. Support embeded HTTP server([CN][v2_CN_SampleHTTP], [EN][v2_EN_SampleHTTP]) for hls(live/vod)
1. Support vod stream(http flv/hls vod stream)([CN][v2_CN_FlvVodStream], [EN][v2_EN_FlvVodStream]).
1. Stable [1.0release branch][branch1].
1. Support publish h264 raw stream([CN][v2_CN_SrsLibrtmp2], [EN][v2_EN_SrsLibrtmp2]) by srs-librtmp.
1. Support [6k+ clients][bug #194], 3Gbps per process.
1. Suppport [English wiki][v2_EN_Home].
1. Research and simplify st, [bug #182][bug #182].
1. Support compile [srs-librtmp on windows][srs-librtmp], [bug #213][bug #213].
1. Support [10k+ clients][bug #251], 4Gbps per process.
1. Support publish aac adts raw stream([CN][v2_CN_SrsLibrtmp3], [EN][v2_EN_SrsLibrtmp3]) by srs-librtmp.
1. Support 0.1s+ latency, read [bug #257][bug #257].
1. Support allow/deny publish/play for all or specified ip([CN][v2_CN_Security], [EN][v2_EN_Security]).
1. Support custom dvr path and http callback, read [bug #179][bug #179] and [bug #274][bug #274].
1. Support rtmp remux to http flv/mp3/aac/ts live stream, read [bug #293][bug #293]([CN][v2_CN_DeliveryHttpStream], [EN][v2_CN_DeliveryHttpStream]).
1. Support HLS(h.264+mp3) streaming, read [bug #301][bug #301].
1. Rewrite HLS(h.264+aac/mp3) streaming, read [bug #304][bug #304].
1. [dev] Realease [2.0release branch][branch2].
1. [experiment] Support Adobe HDS(f4m)([CN][v2_CN_DeliveryHDS], [EN][v2_EN_DeliveryHDS]) dynamic streaming.
1. [experiment] Support push MPEG-TS over UDP to SRS, read [bug #250][bug #250].
1. [experiment] Support push RTSP to SRS, read [bug #133][bug #133].
1. [experiment] Support push flv stream over HTTP POST to SRS, read [wiki]([CN][v2_CN_Streamer2], [EN][v2_EN_Streamer2]).
1. [experiment] Support [srs-dolphin][srs-dolphin], the multiple-process SRS.
1. [experiment] Support [remote console][console], read [srs-ngb][srs-ngb].

## Compare

Compare SRS with other media server.

### Stream Delivery

|   Feature     |   SRS     |   NGINX   | CRTMPD    | FMS       |   WOWZA   |
|   ----------- |   ------- |   -----   | --------- | --------  |   ------  |
|   RTMP        |   Stable  |   Stable  |   Stable  |   Stable  |   Stable  |
|   HLS         |   Stable  |   Stable  |   X       |   Stable  |   Stable  |
|   HDS         | Experiment|   X       |   X       |   Stable  |   Stable  |
|   HTTP FLV    |   Stable  |   X       |   X       |   X       |   X       |
|   HLS(aonly)  |   Stable  |   X       |   X       |   Stable  |   Stable  |
|   HTTP Server |   Stable  |   Stable  |   X       |   X       |   Stable  |

### Cluster

|   Feature     |   SRS     |   NGINX   | CRTMPD    | FMS       |   WOWZA   |
|   ----------- |   ------- |   -----   | --------- | --------  |   ------  |
|   RTMP Edge   |   Stable  |   X       |   X       |   Stable  |   X       |
|   RTMP Backup |   Stable  |   X       |   X       |   X       |   X       |
|   VHOST       |   Stable  |   X       |   X       |   Stable  |   Stable  |
|   Reload      |   Stable  |   X       |   X       |   X       |   X       |
|   Forward     |   Stable  |   X       |   X       |   X       |   X       |
|   ATC         |   Stable  |   X       |   X       |   X       |   X       |

### Stream Service

|   Feature     |   SRS     |   NGINX   | CRTMPD    | FMS       |   WOWZA   |
|   ----------- |   ------- |   -----   | --------- | --------  |   ------  |
|   DVR         |   Stable  |   Stable  |   X       |   X       |   Stable  |
|   Transcode   |   Stable  |   X       |   X       |   X       |   Stable  |
|   HTTP API    |   Stable  |   Stable  |   X       |   X       |   Stable  |
|   HTTP hooks  |   Stable  |   X       |   X       |   X       |   X       |
|   GopCache    |   Stable  |   X       |   X       |   Stable  |   X       |
|   Security    |   Stable  |   Stable  |   X       |   X       |   Stable  |
| Token Traverse|   Stable  |   X       |   X       |   Stable  |   X       |

### Efficiency

|   Feature     |   SRS     |   NGINX   | CRTMPD    | FMS       |   WOWZA   |
|   ----------- |   ------- |   -----   | --------- | --------  |   ------  |
|   Concurrency |   7.5k    |   3k      |   2k      |   2k      |   3k      |
|MultipleProcess| Experiment|   Stable  |   X       |   X       |   X       |
|   RTMP Latency|   0.1s    |   3s      |   3s      |   3s      |   3s      |
|   HLS Latency |   10s     |   30s     |   X       |   30s     |   30s     |

### Stream Caster

|   Feature     |   SRS     |   NGINX   | CRTMPD    | FMS       |   WOWZA   |
|   ----------- |   ------- |   -----   | --------- | --------  |   ------  |
|   Ingest      |   Stable  |   X       |   X       |   X       |   X       |
|   Push MPEGTS | Experiment|   X       |   X       |   X       |   Stable  |
|   Push RTSP   | Experiment|   X       |   Stable  |   X       |   Stable  |
| Push HTTP FLV | Experiment|   X       |   X       |   X       |   X       |

### Debug System

|   Feature     |   SRS     |   NGINX   | CRTMPD    | FMS       |   WOWZA   |
|   ----------- |   ------- |   -----   | --------- | --------  |   ------  |
|   BW check    |   Stable  |   X       |   X       |   X       |   X       |
| Tracable Log  |   Stable  |   X       |   X       |   X       |   X       |

### Docs

|   Feature     |   SRS     |   NGINX   | CRTMPD    | FMS       |   WOWZA   |
|   ----------- |   ------- |   -----   | --------- | --------  |   ------  |
|   Demos       |   Stable  |   X       |   X       |   X       |   X       |
|   WIKI(EN+CN) |   Stable  |  EN only  |   X       |   X       |   Stable  |

### Others

|   Feature     |   SRS     |   NGINX   | CRTMPD    | FMS       |   WOWZA   |
|   ----------- |   ------- |   -----   | --------- | --------  |   ------  |
|   ARM/MIPS    |   Stable  |   Stable  |   X       |   X       |   X       |
| Client Library|   Stable  |   X       |   X       |   X       |   X       |

Remark:

1. Concurrency: The concurrency of single process.
1. MultipleProcess: SRS is single process, while [srs-dolphin][srs-dolphin] is a MultipleProcess SRS.
1. HLS aonly: The HLS audio only streaming delivery.
1. BW check: The bandwidth check.
1. Security: To allow or deny stream publish or play.
1. Reload: Nginx supports reload, but not nginx-rtmp.

## Releases

* 2018-10-28, [Release v2.0-r6][r2.0r6], 2.0 release5, 2.0.263, 86994 lines.
* 2018-10-28, [Release v2.0-r5][r2.0r5], 2.0 release5, 2.0.258, 86916 lines.
* 2018-08-12, [Release v2.0-r4][r2.0r4], 2.0 release4, 2.0.255, 86915 lines.
* 2018-07-18, [Release v2.0-r3][r2.0r3], 2.0 release3, 2.0.248, 86775 lines.
* 2017-06-10, [Release v2.0-r2][r2.0r2], 2.0 release2, 2.0.243, 86670 lines.
* 2017-04-18, [Release v2.0-r1][r2.0r1], 2.0 release1, 2.0.239, 86515 lines.
* 2017-03-03, [Release v2.0-r0][r2.0r0], 2.0 release0, 2.0.234, 86373 lines.
* 2017-01-18, [Release v2.0-b4][r2.0b4], 2.0 beta4, 2.0.230, 86334 lines.
* 2016-11-13, [Release v2.0-b3][r2.0b3], 2.0 beta3, 2.0.223, 86685 lines.
* 2016-11-09, [Release v2.0-b2][r2.0b2], 2.0 beta2, 2.0.221, 86691 lines.
* 2016-09-09, [Release v2.0-b1][r2.0b1], 2.0 beta1, 2.0.215, 89941 lines.
* 2016-08-06, [Release v2.0-b0][r2.0b0], 2.0 beta0, 2.0.210, 89704 lines.
* 2015-12-23, [Release v2.0-a3][r2.0a3], 2.0 alpha3, 2.0.205, 89544 lines.
* 2015-10-08, [Release v2.0-a2][r2.0a2], 2.0 alpha2, 2.0.195, 89358 lines.
* 2015-09-14, [Release v2.0-a1][r2.0a1], 2.0 alpha1, 2.0.189, 89269 lines.
* 2015-08-23, [Release v2.0-a0][r2.0a0], 2.0 alpha0, 2.0.185, 89022 lines.
* 2015-05-23, [Release v1.0-r4][r1.0r4], bug fixed, 1.0.32, 59509 lines.
* 2015-03-19, [Release v1.0-r3][r1.0r3], bug fixed, 1.0.30, 59511 lines.
* 2015-02-12, [Release v1.0-r2][r1.0r2], bug fixed, 1.0.27, 59507 lines.
* 2015-01-15, [Release v1.0-r1][r1.0r1], bug fixed, 1.0.21, 59472 lines.
* 2014-12-05, [Release v1.0-r0][r1.0r0], all bug fixed, 1.0.10, 59391 lines.
* 2014-10-09, [Release v0.9.8][r1.0b0], all bug fixed, 1.0.0, 59316 lines.
* 2014-08-03, [Release v0.9.7][r1.0a7], config utest, all bug fixed. 57432 lines.
* 2014-07-13, [Release v0.9.6][r1.0a6], core/kernel/rtmp utest, refine bandwidth(as/js/srslibrtmp library). 50029 lines.
* 2014-06-27, [Release v0.9.5][r1.0a5], refine perf 3k+ clients, edge token traverse, [srs monitor](http://ossrs.net:1977), 30days online. 41573 lines.
* 2014-05-28, [Release v0.9.4][r1.0a4], support heartbeat, tracable log, fix mem leak and bugs. 39200 lines.
* 2014-05-18, [Release v0.9.3][r1.0a3], support mips, fms origin, json(http-api). 37594 lines.
* 2014-04-28, [Release v0.9.2][r1.0a2], support [dvr][v2_CN_DVR], android, [edge][v2_CN_Edge]. 35255 lines.
* 2014-04-07, [Release v0.9.1][r1.0a0], support [arm][v1_CN_SrsLinuxArm], [init.d][v1_CN_LinuxService], http [server][v2_CN_HTTPServer]/[api][v2_CN_HTTPApi], [ingest][v1_CN_SampleIngest]. 30000 lines.
* 2013-12-25, [Release v0.9.0][r0.9], support bandwidth test, player/encoder/chat [demos][v1_CN_SampleDemo]. 20926 lines.
* 2013-12-08, [Release v0.8.0][r0.8], support [http hooks callback][v2_CN_HTTPCallback], update [SB][srs-bench]. 19186 lines.
* 2013-12-03, [Release v0.7.0][r0.7], support [live stream transcoding][v2_CN_FFMPEG]. 17605 lines.
* 2013-11-29, [Release v0.6.0][r0.6], support [forward][v1_CN_Forward] stream to origin/edge. 16094 lines.
* 2013-11-26, [Release v0.5.0][r0.5], support [HLS(m3u8)][v2_CN_DeliveryHLS], fragment and window. 14449 lines.
* 2013-11-10, [Release v0.4.0][r0.4], support [reload][v1_CN_Reload] config, pause, longtime publish/play. 12500 lines.
* 2013-11-04, [Release v0.3.0][r0.3], support [vhost][v1_CN_RtmpUrlVhost], refer, gop cache, listen multiple ports. 11773 lines.
* 2013-10-25, [Release v0.2.0][r0.2], support [rtmp][v1_CN_RTMPHandshake] flash publish, h264, time jitter correct. 10125 lines.
* 2013-10-23, [Release v0.1.0][r0.1], support [rtmp FMLE/FFMPEG publish][v1_CN_DeliveryRTMP], vp6. 8287 lines.
* 2013-10-17, Created.

## History

* v2.0, 2019-04-05, [2.0 release5(2.0.263)][r2.0r6] released. 86994 lines.
* v2.0, 2019-04-05, Merge [#1312][bug #1312], Fix GCC7 build error, this statement may fall through. 2.0.263
* v2.0, 2019-04-05, Merge [#1339][bug #1339], Support HTTP-FLV params. 2.0.262
* v2.0, 2018-12-01, Merge [#1274][bug #1274], Upgrade to FFMPEG 4.1 and X264 157. 2.0.261
* v2.0, 2018-11-11, Merge [#1261][bug #1261], Support `_definst_` for Wowza. 2.0.260
* v2.0, 2018-11-11, Merge [#1263][bug #1263], Fix string trim bug. 2.0.259
* v2.0, 2018-10-28, [2.0 release5(2.0.258)][r2.0r5] released. 86916 lines.
* v2.0, 2018-10-28, Fix [#1250][bug #1250], Support build on OSX10.14 Mojave. 2.0.258
* v2.0, 2018-10-08, Merge [#1236][bug #1236], Fix sleep bug in us. 2.0.257
* v2.0, 2018-10-08, Merge [#1237][bug #1237], Support param for transcoder. 2.0.256
* v2.0, 2018-08-12, [2.0 release4(2.0.255)][r2.0r4] released. 86915 lines.
* v2.0, 2018-08-12, For [#1202][bug #1202], Support edge/forward to Aliyun CDN. 2.0.255 
* v2.0, 2018-08-11, For [#910][bug #910], Support HTTP FLV with HTTP callback. 2.0.254
* v2.0, 2018-08-11, For [#1110][bug #1110], Refine params in http callback. 2.0.253
* v2.0, 2018-08-05, Refine HTTP-FLV latency, support realtime mode. 2.0.252
* v2.0, 2018-08-04, For [#1110][bug #1110], Support params in http callback. 2.0.251
* v2.0, 2018-08-02, For [#1031][bug #1031], SRS edge support douyu.com. 2.0.250
* v2.0, 2018-07-21, Merge [#1119][bug #1119], fix memory leak. 2.0.249
* v2.0, 2018-07-18, [2.0 release3(2.0.248)][r2.0r3] released. 86775 lines.
* v2.0, 2018-07-17, Merge [#1176][bug #1176], fix scaned issues. 2.0.248
* v2.0, 2018-02-28, Merge [#1077][bug #1077], fix crash for edge HLS. 2.0.247
* v2.0, 2018-02-13, Fix [#1059][bug #1059], support vhost in stream parameters. 2.0.246
* v2.0, 2018-01-07, Merge [#1045][bug #1045], fix [#1044][bug #1044], TCP connection alive detection. 2.0.245
* v2.0, 2018-01-04, Merge [#1039][bug #1039], fix bug of init.d script.
* v2.0, 2018-01-01, Merge [#1033][bug #1033], allow user to add some specific flags. 2.0.244
* v2.0, 2017-06-10, [2.0 release2(2.0.243)][r2.0r2] released. 86670 lines.
* v2.0, 2017-05-29, Merge [#899][bug #899] to fix [#893][bug #893], ts PES ext length. 2.0.243
* v2.0, 2017-05-01, Fix [#865][bug #865], shouldn't remove ts/m3u8 when hls_dispose disabled. 2.0.242
* v2.0, 2017-04-30, Fix [#636][bug #636], FD leak for requesting empty HTTP stream. 2.0.241
* v2.0, 2017-04-23, Fix [#851][bug #851], HTTP API support number of video frames for FPS. 2.0.240
* v2.0, 2017-04-18, [2.0 release1(2.0.239)][r2.0r1] released. 86515 lines.
* v2.0, 2017-04-18, Fix [#848][bug #848], crash at HTTP fast buffer grow. 2.0.239
* v2.0, 2017-04-15, Fix [#844][bug #844], support Haivision encoder. 2.0.238
* v2.0, 2017-04-15, Merge [#846][bug #846], fix fd leak for FLV stream caster. 2.0.237
* v2.0, 2017-04-15, Merge [#841][bug #841], avoid the duplicated sps/pps in ts. 2.0.236
* v2.0, 2017-04-09, Fix [#834][bug #834], crash for TS context corrupt. 2.0.235
* v2.0, 2017-03-03, [2.0 release0(2.0.234)][r2.0r0] released. 86373 lines.
* v2.0, 2017-02-25, for [#730][bug #730], remove the test code. 2.0.234
* v2.0, 2017-02-09, fix [#503][bug #503] disable utilities when reload a source. 2.0.233
* v2.0, 2017-01-22, for [#752][bug #752] release the io then free it for kbps. 2.0.232
* v2.0, 2017-01-18, fix [#750][bug #750] use specific error code for dns resolve. 2.0.231
* v2.0, 2017-01-18, [2.0 beta4(2.0.230)][r2.0b4] released. 86334 lines.
* v2.0, 2017-01-18, fix [#749][bug #749], timestamp overflow for ATC. 2.0.230
* v2.0, 2017-01-11, fix [#740][bug #740], convert ts aac audio private stream 1 to common. 2.0.229
* v2.0, 2017-01-11, fix [#588][bug #588], kbps interface error. 2.0.228
* v2.0, 2017-01-11, fix [#736][bug #736], recovery the hls dispose. 2.0.227
* v2.0, 2017-01-10, refine hls html5 video template.
* v2.0, 2017-01-10, fix [#635][bug #635], hls support NonIDR(open gop). 2.0.226
* v2.0, 2017-01-06, for [#730][bug #730], reset ack follow flash player rules. 2.0.225
* v2.0, 2016-12-15, for [#513][bug #513], remove hls ram from srs2 to srs3+. 2.0.224
* v2.0, 2016-12-13, [2.0 beta3(2.0.223)][r2.0b3] released. 86685 lines.
* v2.0, 2016-12-13, fix [#713][bug #713], disable the source cleanup. 2.0.223
* v2.0, 2016-12-13, fix [#713][bug #713], refine source to avoid critical fetch and create. 2.0.222
* v2.0, 2016-11-09, [2.0 beta2(2.0.221)][r2.0b2] released. 86691 lines.
* v2.0, 2016-11-05, fix [#654][bug #654], crash when source cleanup for edge. 2.0.221
* v2.0, 2016-10-26, fix [#666][bug #666], crash when source cleanup for http-flv. 2.0.220
* v2.0, 2016-10-10, fix [#661][bug #661], close fd after thread stopped. 2.0.219
* v2.0, 2016-09-23, support asprocess for oryx. 2.0.218
* v2.0, 2016-09-23, support change work_dir for oryx.
* v2.0, 2016-09-15, fix [#640][bug #640], typo for rtmp type. 2.0.217
* v2.0, 2016-09-12, fix fast stream error bug. 2.0.216
* v2.0, 2016-09-09, [2.0 beta1(2.0.215)][r2.0b1] released. 89941 lines.
* v2.0, 2016-09-09, refine librtmp comments about NALUs. 2.0.215
* v2.0, 2016-09-05, fix memory leak at source. 2.0.214
* v2.0, 2016-09-05, fix memory leak at handshake. 2.0.213
* v2.0, 2016-09-04, support valgrind for [patched st](https://github.com/ossrs/state-threads/issues/2).
* v2.0, 2016-09-03, support all arm for [patched st](https://github.com/ossrs/state-threads/issues/1). 2.0.212
* v2.0, 2016-09-01, workaround [#511][bug #511] the fly stfd in close. 2.0.211
* v2.0, 2016-08-30, comment the pcr.
* v2.0, 2016-08-18, fix [srs-librtmp#4](https://github.com/ossrs/srs-librtmp/issues/4) filter frame.
* v2.0, 2016-08-10, fix socket timeout for librtmp.
* v2.0, 2016-08-08, fix the crash by srs_info log.
* v2.0, 2016-08-06, [2.0 beta0(2.0.210)][r2.0b0] released. 89704 lines.
* v2.0, 2016-05-17, fix the sps pps parse bug.
* v2.0, 2016-01-13, fix http reader bug, support infinite chunked. 2.0.209
* v2.0, 2016-01-09, merge [#559][pr #559] fix memory leak bug. 2.0.208
* v2.0, 2016-01-09, merge [#558][pr #558] add tcUrl for on_publish.
* v2.0, 2016-01-05, add keyword XCORE for coredump to identify the version. 2.0.207
* v2.0, 2015-12-23, [2.0 alpha3(2.0.205)][r2.0a3] released. 89544 lines.
* v2.0, 2015-12-22, for [#509][bug #509] always alloc big object at heap. 2.0.205
* v2.0, 2015-12-22, for [#418][bug #418] ignore null connect props to make RED5 happy. 2.0.204
* v2.0, 2015-12-22, for [#546][bug #546] thread terminate normally dispose bug. 2.0.203
* v2.0, 2015-12-22, for [#541][bug #541] failed when chunk size too small. 2.0.202
* v2.0, 2015-12-15, default hls_on_error to continue. 2.0.201
* v2.0, 2015-11-16, for [#518][bug #518] fix fd leak bug when fork. 2.0.200
* v2.0, 2015-11-05, for [#511][bug #511] fix bug for restart thread. 2.0.199
* v2.0, 2015-11-02, for [#515][bug #515] use srs_freepa and SrsAutoFreeA for array. 2.0.198
* v2.0, 2015-10-28, for [ExoPlayer #828][exo #828], remove duration for live.
* v2.0, 2015-10-28, for [ExoPlayer #828][exo #828], add av tag in flv header. 2.0.197
* v2.0, 2015-10-27, for [#512][bug #512] partial hotfix the hls pure audio. 2.0.196
* v2.0, 2015-10-08, [2.0 alpha2(2.0.195)][r2.0a2] released. 89358 lines.
* v2.0, 2015-10-04, for [#448][bug #448] fix the bug of response of http hooks. 2.0.195
* v2.0, 2015-10-01, for [#497][bug #497] response error when client not found to kickoff. 2.0.194
* v2.0, 2015-10-01, for [#495][bug #495] decrease the srs-librtmp size. 2.0.193
* v2.0, 2015-09-23, for [#485][bug #485] error when arm glibc 2.15+ or not i386/x86_64/amd64. 2.0.192
* v2.0, 2015-09-23, for [#485][bug #485] srs for respberrypi and cubieboard. 2.0.191
* v2.0, 2015-09-21, fix [#484][bug #484] hotfix the openssl build script 2.0.190
* v2.0, 2015-09-14, [2.0 alpha1(2.0.189)][r2.0a1] released. 89269 lines.
* v2.0, 2015-09-14, fix [#474][bug #474] config to donot parse width/height from sps. 2.0.189
* v2.0, 2015-09-14, for [#474][bug #474] always release publish for source.
* v2.0, 2015-09-14, for [#458][bug #458] http hooks use source thread cid. 2.0.188
* v2.0, 2015-09-14, for [#475][bug #475] fix http hooks crash for st context switch. 2.0.187
* v2.0, 2015-09-09, support reload utc_time. 2.0.186
* v2.0, 2015-08-23, [2.0 alpha0(2.0.185)][r2.0a0] released. 89022 lines.
* v2.0, 2015-08-22, HTTP API support JSONP by specifies the query string callback=xxx.
* v2.0, 2015-08-20, fix [#380][bug #380], srs-librtmp send sequence header when sps or pps changed.
* v2.0, 2015-08-18, close [#454][bug #454], support obs restart publish. 2.0.184
* v2.0, 2015-08-14, use reduce_sequence_header for stream control.
* v2.0, 2015-08-14, use send_min_interval for stream control. 2.0.183
* v2.0, 2015-08-12, enable the SRS_PERF_TCP_NODELAY and add config tcp_nodelay. 2.0.182
* v2.0, 2015-08-11, for [#442][bug #442] support kickoff connected client. 2.0.181
* v2.0, 2015-07-21, for [#169][bug #169] support default values for transcode. 2.0.180
* v2.0, 2015-07-21, fix [#435][bug #435] add pageUrl for HTTP callback on_play.
* v2.0, 2015-07-20, refine the hls, ignore packet when no sequence header. 2.0.179
* v2.0, 2015-07-16, for [#441][bug #441] use 30s timeout for first msg. 2.0.178
* v2.0, 2015-07-14, refine hls disable the time jitter, support not mix monotonically increase. 2.0.177
* v2.0, 2015-07-01, fix [#433][bug #433] fix the sps parse bug. 2.0.176
* v2.0, 2015-06-10, fix [#425][bug #425] refine the time jitter, correct (-inf,-250)+(250,+inf) to 10ms. 2.0.175
* v2.0, 2015-06-10, fix [#424][bug #424] fix aggregate timestamp bug. 2.0.174
* v2.0, 2015-06-06, fix [#421][bug #421] drop video for unkown RTMP header.
* v2.0, 2015-06-05, fix [#420][bug #420] remove ts for hls ram mode.
* v2.0, 2015-05-30, fix [#209][bug #209] cleanup hls when stop and timeout. 2.0.173.
* v2.0, 2015-05-29, fix [#409][bug #409] support pure video hls. 2.0.172.
* v2.0, 2015-05-28, support [srs-dolphin][srs-dolphin], the multiple-process SRS.
* v2.0, 2015-05-24, fix [#404][bug #404] register handler then start http thread. 2.0.167.
* v2.0, 2015-05-23, refine the thread, protocol, kbps code. 2.0.166
* v2.0, 2015-05-23, fix [#391][bug #391] copy request for async call.
* v2.0, 2015-05-22, fix [#397][bug #397] the USER_HZ maybe not 100. 2.0.165
* v2.0, 2015-05-22, for [#400][bug #400], parse when got entire http header, by feilong. 2.0.164.
* v2.0, 2015-05-19, merge from bravo system, add the rtmfp to bms(commercial srs). 2.0.163.
* v2.0, 2015-05-10, support push flv stream over HTTP POST to SRS.
* v2.0, 2015-04-20, support ingest hls live stream to RTMP.
* v2.0, 2015-04-15, for [#383][bug #383], support mix_correct algorithm. 2.0.161.
* v2.0, 2015-04-13, for [#381][bug #381], support reap hls/ts by gop or not. 2.0.160.
* v2.0, 2015-04-10, enhanced on_hls_notify, support HTTP GET when reap ts.
* v2.0, 2015-04-10, refine the hls deviation for floor algorithm.
* v2.0, 2015-04-08, for [#375][bug #375], fix hls bug, keep cc continous between ts files. 2.0.159.
* v2.0, 2015-04-04, for [#304][bug #304], rewrite annexb mux for ts, refer to apple sample. 2.0.157.
* v2.0, 2015-04-03, enhanced avc decode, parse the sps get width+height. 2.0.156.
* v2.0, 2015-04-03, for [#372][bug #372], support transform vhost of edge 2.0.155.
* v2.0, 2015-03-30, for [#366][bug #366], config hls to disable cleanup of ts. 2.0.154.
* v2.0, 2015-03-31, support server cycle handler. 2.0.153.
* v2.0, 2015-03-31, support on_hls for http hooks. 2.0.152.
* v2.0, 2015-03-31, enhanced hls, support deviation for duration. 2.0.151.
* v2.0, 2015-03-30, for [#351][bug #351], support config the m3u8/ts path for hls. 2.0.149.
* v2.0, 2015-03-17, for [#155][bug #155], osx(darwin) support demo with nginx and ffmpeg. 2.0.143.
* v2.0, 2015-03-15, start [2.0release branch][branch2], 80773 lines.
* v2.0, 2015-03-14, fix [#324][bug #324], support hstrs(http stream trigger rtmp source) edge mode. 2.0.140.
* v2.0, 2015-03-14, for [#324][bug #324], support hstrs(http stream trigger rtmp source) origin mode. 2.0.139.
* v2.0, 2015-03-12, fix [#328][bug #328], support adobe hds. 2.0.138.
* v2.0, 2015-03-10, fix [#155][bug #155], support osx(darwin) for mac pro. 2.0.137.
* v2.0, 2015-03-08, fix [#316][bug #316], http api provides stream/vhost/srs/server bytes, codec and count. 2.0.136.
* v2.0, 2015-03-08, fix [#310][bug #310], refine aac LC, support aac HE/HEv2. 2.0.134.
* v2.0, 2015-03-06, for [#322][bug #322], fix http-flv stream bug, support multiple streams. 2.0.133.
* v2.0, 2015-03-06, refine http request parse. 2.0.132.
* v2.0, 2015-03-01, for [#179][bug #179], revert dvr http api. 2.0.128.
* v2.0, 2015-02-24, for [#304][bug #304], fix hls bug, write pts/dts error. 2.0.124
* v2.0, 2015-02-19, refine dvr, append file when dvr file exists. 2.0.122.
* v2.0, 2015-02-19, refine pithy print to more easyer to use. 2.0.121.
* v2.0, 2015-02-18, fix [#133][bug #133], support push rtsp to srs. 2.0.120.
* v2.0, 2015-02-17, the join maybe failed, should use a variable to ensure thread terminated. 2.0.119.
* v2.0, 2015-02-15, for [#304][bug #304], support config default acodec/vcodec. 2.0.118.
* v2.0, 2015-02-15, for [#304][bug #304], rewrite hls/ts code, support h.264+mp3 for hls. 2.0.117.
* v2.0, 2015-02-12, for [#304][bug #304], use stringstream to generate m3u8, add hls_td_ratio. 2.0.116.
* v2.0, 2015-02-11, dev code ZhouGuowen for 2.0.115.
* v2.0, 2015-02-10, for [#311][bug #311], set pcr_base to dts. 2.0.114.
* v2.0, 2015-02-10, fix [the bug][p21] of ibmf format which decoded in annexb.
* v2.0, 2015-02-10, for [#310][bug #310], downcast aac SSR to LC. 2.0.113
* v2.0, 2015-02-03, fix [#136][bug #136], support hls without io(in ram). 2.0.112
* v2.0, 2015-01-31, for [#250][bug #250], support push MPEGTS over UDP to SRS. 2.0.111
* v2.0, 2015-01-29, build libfdk-aac in ffmpeg. 2.0.108
* v2.0, 2015-01-25, for [#301][bug #301], hls support h.264+mp3, ok for vlc. 2.0.107
* v2.0, 2015-01-25, for [#301][bug #301], http ts stream support h.264+mp3. 2.0.106
* v2.0, 2015-01-25, hotfix [#268][bug #268], refine the pcr start at 0, dts/pts plus delay. 2.0.105
* v2.0, 2015-01-25, hotfix [#151][bug #151], refine pcr=dts-800ms and use dts/pts directly. 2.0.104
* v2.0, 2015-01-23, hotfix [#151][bug #151], use absolutely overflow to make jwplayer happy. 2.0.103
* v2.0, 2015-01-22, for [#293][bug #293], support http live ts stream. 2.0.101.
* v2.0, 2015-01-19, for [#293][bug #293], support http live flv/aac/mp3 stream with fast cache. 2.0.100.
* v2.0, 2015-01-18, for [#293][bug #293], support rtmp remux to http flv live stream. 2.0.99.
* v2.0, 2015-01-17, fix [#277][bug #277], refine http server refer to go http-framework. 2.0.98
* v2.0, 2015-01-17, for [#277][bug #277], refine http api refer to go http-framework. 2.0.97
* v2.0, 2015-01-17, hotfix [#290][bug #290], use iformat only for rtmp input. 2.0.95
* v2.0, 2015-01-08, hotfix [#281][bug #281], fix hls bug ignore type-9 send aud. 2.0.93
* v2.0, 2015-01-03, fix [#274][bug #274], http-callback support on_dvr when reap a dvr file. 2.0.89
* v2.0, 2015-01-03, hotfix to remove the pageUrl for http callback. 2.0.88
* v2.0, 2015-01-03, fix [#179][bug #179], dvr support custom filepath by variables. 2.0.87
* v2.0, 2015-01-02, fix [#211][bug #211], support security allow/deny publish/play all/ip. 2.0.86
* v2.0, 2015-01-02, hotfix [#207][bug #207], trim the last 0 of log. 2.0.85
* v2.0, 2014-01-02, fix [#158][bug #158], http-callback check http status code ok(200). 2.0.84
* v2.0, 2015-01-02, hotfix [#216][bug #216], http-callback post in application/json content-type. 2.0.83
* v2.0, 2014-01-02, fix [#263][bug #263], srs-librtmp flv read tag should init size. 2.0.82
* v2.0, 2015-01-01, hotfix [#270][bug #270], memory leak for http client post. 2.0.81
* v2.0, 2014-12-12, fix [#266][bug #266], aac profile is object id plus one. 2.0.80
* v2.0, 2014-12-29, hotfix [#267][bug #267], the forward dest ep should use server. 2.0.79
* v2.0, 2014-12-29, hotfix [#268][bug #268], the hls pcr is negative when startup. 2.0.78
* v2.0, 2014-12-22, hotfix [#264][bug #264], ignore NALU when sequence header to make HLS happy. 2.0.76
* v2.0, 2014-12-20, hotfix [#264][bug #264], support disconnect publish connect when hls error. 2.0.75
* v2.0, 2014-12-12, fix [#257][bug #257], support 0.1s+ latency. 2.0.70
* v2.0, 2014-12-08, update wiki for mr([EN][v2_EN_LowLatency#merged-read], [CN][v2_CN_LowLatency#merged-read]) and mw([EN][v2_EN_LowLatency#merged-write], [CN][v2_CN_LowLatency#merged-write]).
* v2.0, 2014-12-07, fix [#251][bug #251], 10k+ clients, use queue cond wait and fast vector. 2.0.67
* v2.0, 2014-12-05, fix [#251][bug #251], 9k+ clients, use fast cache for msgs queue. 2.0.57
* v2.0, 2014-12-04, fix [#241][bug #241], add mw(merged-write) config. 2.0.53
* v2.0, 2014-12-04, for [#241][bug #241], support mr(merged-read) config and reload. 2.0.52.
* v2.0, 2014-12-04, enable [#241][bug #241] and [#248][bug #248], +25% performance, 2.5k publisher. 2.0.50
* v2.0, 2014-12-04, fix [#248][bug #248], improve about 15% performance for fast buffer. 2.0.49
* v2.0, 2014-12-03, fix [#244][bug #244], conn thread use cond to wait for recv thread error. 2.0.47.
* v2.0, 2014-12-02, merge [#239][p23], traverse the token before response connect. 2.0.45.
* v2.0, 2014-12-02, srs-librtmp support hijack io apis for st-load. 2.0.42.
* v2.0, 2014-12-01, for [#237][bug #237], refine syscall for recv, supports 1.5k clients. 2.0.41.
* v2.0, 2014-11-30, add qtcreate project file trunk/src/qt/srs/srs-qt.pro. 2.0.39.
* v2.0, 2014-11-29, fix [#235][bug #235], refine handshake, replace union with template method. 2.0.38.
* v2.0, 2014-11-28, fix [#215][bug #215], add srs_rtmp_dump tool. 2.0.37.
* v2.0, 2014-11-25, update PRIMARY, AUTHORS, CONTRIBUTORS rule. 2.0.32.
* v2.0, 2014-11-24, fix [#212][bug #212], support publish aac adts raw stream. 2.0.31.
* v2.0, 2014-11-22, fix [#217][bug #217], remove timeout recv, support 7.5k+ 250kbps clients. 2.0.30.
* v2.0, 2014-11-21, srs-librtmp add rtmp prefix for rtmp/utils/human apis. 2.0.29.
* v2.0, 2014-11-21, refine examples of srs-librtmp, add srs_print_rtmp_packet. 2.0.28.
* v2.0, 2014-11-20, fix [#212][bug #212], support publish audio raw frames. 2.0.27
* v2.0, 2014-11-19, fix [#213][bug #213], support compile [srs-librtmp on windows](https://github.com/winlinvip/srs.librtmp), [bug #213][bug #213]. 2.0.26
* v2.0, 2014-11-18, all wiki translated to English. 2.0.23.
* v2.0, 2014-11-15, fix [#204][bug #204], srs-librtmp drop duplicated sps/pps(sequence header). 2.0.22.
* v2.0, 2014-11-15, fix [#203][bug #203], srs-librtmp drop any video before sps/pps(sequence header). 2.0.21.
* v2.0, 2014-11-15, fix [#202][bug #202], fix memory leak of h.264 raw packet send in srs-librtmp. 2.0.20.
* v2.0, 2014-11-13, fix [#200][bug #200], deadloop when read/write 0 and ETIME. 2.0.16.
* v2.0, 2014-11-13, fix [#194][bug #194], writev multiple msgs, support 6k+ 250kbps clients. 2.0.15.
* v2.0, 2014-11-12, fix [#194][bug #194], optmized st for timeout recv. pulse to 500ms. 2.0.14.
* v2.0, 2014-11-11, fix [#195][bug #195], remove the confuse code st_usleep(0). 2.0.13.
* v2.0, 2014-11-08, fix [#191][bug #191], configure --export-librtmp-project and --export-librtmp-single. 2.0.11.
* v2.0, 2014-11-08, fix [#66][bug #66], srs-librtmp support write h264 raw packet. 2.0.9.
* v2.0, 2014-10-25, fix [#185][bug #185], AMF0 support 0x0B the date type codec. 2.0.7.
* v2.0, 2014-10-24, fix [#186][bug #186], hotfix for bug #186, drop connect args when not object. 2.0.6.
* v2.0, 2014-10-24, rename wiki/xxx to wiki/v1_CN_xxx. 2.0.3.
* v2.0, 2014-10-19, fix [#184][bug #184], support AnnexB in RTMP body for HLS. 2.0.2
* v2.0, 2014-10-18, remove supports for OSX(darwin). 2.0.1.
* v2.0, 2014-10-16, revert github srs README to English. 2.0.0.
* v1.0, 2014-12-05, [1.0 release(1.0.10)][r1.0r0] released. 59391 lines.
* v1.0, 2014-10-09, [1.0 beta(1.0.0)][r1.0b0] released. 59316 lines.
* v1.0, 2014-10-08, fix [#151][bug #151], always reap ts whatever audio or video packet. 0.9.223.
* v1.0, 2014-10-08, fix [#162][bug #162], failed if no epoll. 0.9.222.
* v1.0, 2014-09-30, fix [#180][bug #180], crash for multiple edge publishing the same stream. 0.9.220.
* v1.0, 2014-09-26, fix hls bug, refine config and log, according to clion of jetbrains. 0.9.216. 
* v1.0, 2014-09-25, fix [#177][bug #177], dvr segment add config dvr_wait_keyframe. 0.9.213.
* v1.0, 2014-08-28, fix [#167][bug #167], add openssl includes to utest. 0.9.209.
* v1.0, 2014-08-27, max connections is 32756, for st use mmap default. 0.9.209
* v1.0, 2014-08-24, fix [#150][bug #150], forward should forward the sequence header when retry. 0.9.208.
* v1.0, 2014-08-22, for [#165][bug #165], refine dh wrapper, ensure public key is 128bytes. 0.9.206.
* v1.0, 2014-08-19, for [#160][bug #160], support forward/edge to flussonic, disable debug_srs_upnode to make flussonic happy. 0.9.201.
* v1.0, 2014-08-17, for [#155][bug #155], refine for osx, with ssl/http, disable statistics. 0.9.198.
* v1.0, 2014-08-06, fix [#148][bug #148], simplify the RTMP handshake key generation. 0.9.191.
* v1.0, 2014-08-06, fix [#147][bug #147], support identify the srs edge. 0.9.190.
* v1.0, 2014-08-03, [1.0 mainline7(0.9.189)][r1.0a7] released. 57432 lines.
* v1.0, 2014-08-03, fix [#79][bug #79], fix the reload remove edge assert bug. 0.9.189.
* v1.0, 2014-08-03, fix [#57][bug #57], use lock(acquire/release publish) to avoid duplicated publishing. 0.9.188.
* v1.0, 2014-08-03, fix [#85][bug #85], fix the segment-dvr sequence header missing. 0.9.187.
* v1.0, 2014-08-03, fix [#145][bug #145], refine ffmpeg log, check abitrate for libaacplus. 0.9.186.
* v1.0, 2014-08-03, fix [#143][bug #143], fix retrieve sys stat bug for all linux. 0.9.185.
* v1.0, 2014-08-02, fix [#138][bug #138], fix http hooks bug, regression bug. 0.9.184.
* v1.0, 2014-08-02, fix [#142][bug #142], fix tcp stat slow bug, use /proc/net/sockstat instead, refer to 'ss -s'. 0.9.183.
* v1.0, 2014-07-31, fix [#141][bug #141], support tun0(vpn network device) ip retrieve. 0.9.179.
* v1.0, 2014-07-27, support partially build on OSX(Darwin). 0.9.177
* v1.0, 2014-07-27, api connections add udp, add disk iops. 0.9.176
* v1.0, 2014-07-26, complete config utest. 0.9.173
* v1.0, 2014-07-26, fix [#124][bug #124], gop cache support disable video in publishing. 0.9.171.
* v1.0, 2014-07-23, fix [#121][bug #121], srs_info detail log compile failed. 0.9.168.
* v1.0, 2014-07-19, fix [#119][bug #119], use iformat and oformat for ffmpeg transcode. 0.9.163.
* v1.0, 2014-07-13, [1.0 mainline6(0.9.160)][r1.0a6] released. 50029 lines.
* v1.0, 2014-07-13, refine the bandwidth check/test, add as/js library, use srs-librtmp for linux tool. 0.9.159
* v1.0, 2014-07-12, complete rtmp stack utest. 0.9.156
* v1.0, 2014-07-06, fix [#81][bug #81], fix HLS codec info, IOS ok. 0.9.153.
* v1.0, 2014-07-06, fix [#103][bug #103], support all aac sample rate. 0.9.150.
* v1.0, 2014-07-05, complete kernel utest. 0.9.149
* v1.0, 2014-06-30, fix [#111][bug #111], always use 31bits timestamp. 0.9.143.
* v1.0, 2014-06-28, response the call message with null. 0.9.137
* v1.0, 2014-06-28, fix [#110][bug #110], thread start segment fault, thread cycle stop destroy thread. 0.9.136
* v1.0, 2014-06-27, fix [#109][bug #109], fix the system jump time, adjust system startup time. 0.9.135
* v1.0, 2014-06-27, [1.0 mainline5(0.9.134)][r1.0a5] released. 41573 lines.
* v1.0, 2014-06-27, SRS online 30days with RTMP/HLS.
* v1.0, 2014-06-25, fix [#108][bug #108], support config time jitter for encoder non-monotonical stream. 0.9.133
* v1.0, 2014-06-23, support report summaries in heartbeat. 0.9.132
* v1.0, 2014-06-22, performance refine, support [3k+][v1_CN_Performance#performancereport4k] connections(270kbps). 0.9.130
* v1.0, 2014-06-21, support edge [token traverse][v1_CN_DRM#tokentraverse], fix [#104][bug #104]. 0.9.129
* v1.0, 2014-06-19, add connections count to api summaries. 0.9.127
* v1.0, 2014-06-19, add srs bytes and kbps to api summaries. 0.9.126
* v1.0, 2014-06-18, add network bytes to api summaries. 0.9.125
* v1.0, 2014-06-14, fix [#98][bug #98], workaround for librtmp ping(fmt=1,cid=2 fresh stream). 0.9.124
* v1.0, 2014-05-29, support flv inject and flv http streaming with start=bytes. 0.9.122
* v1.0, 2014-05-28, [1.0 mainline4(0.9.120)][r1.0a4] released. 39200 lines.
* v1.0, 2014-05-27, fix [#87][bug #87], add source id for full trackable log. 0.9.120
* v1.0, 2014-05-27, fix [#84][bug #84], unpublish when edge disconnect. 0.9.119
* v1.0, 2014-05-27, fix [#89][bug #89], config to /dev/null to disable ffmpeg log. 0.9.117
* v1.0, 2014-05-25, fix [#76][bug #76], allow edge vhost to add or remove. 0.9.114
* v1.0, 2014-05-24, Johnny contribute [ossrs.net](http://ossrs.net). karthikeyan start to translate wiki to English.
* v1.0, 2014-05-22, fix [#78][bug #78], st joinable thread must be stop by other threads, 0.9.113
* v1.0, 2014-05-22, support amf0 StrictArray(0x0a). 0.9.111.
* v1.0, 2014-05-22, support flv parser, add amf0 to librtmp. 0.9.110
* v1.0, 2014-05-22, fix [#74][bug #74], add tcUrl for http callback on_connect, 0.9.109
* v1.0, 2014-05-19, support http heartbeat, 0.9.107
* v1.0, 2014-05-18, [1.0 mainline3(0.9.105)][r1.0a3] released. 37594 lines.
* v1.0, 2014-05-18, support http api json, to PUT/POST. 0.9.105
* v1.0, 2014-05-17, fix [#72][bug #72], also need stream_id for send_and_free_message. 0.9.101
* v1.0, 2014-05-17, rename struct to class. 0.9.100
* v1.0, 2014-05-14, fix [#67][bug #67] pithy print, stage must has a age. 0.9.98
* v1.0, 2014-05-13, fix mem leak for delete[] SharedPtrMessage array. 0.9.95
* v1.0, 2014-05-12, refine the kbps calc module. 0.9.93
* v1.0, 2014-05-12, fix bug [#64][bug #64]: install_dir=DESTDIR+PREFIX
* v1.0, 2014-05-08, fix [#36][bug #36]: never directly use \*(int32_t\*) for arm.
* v1.0, 2014-05-08, fix [#60][bug #60]: support aggregate message
* v1.0, 2014-05-08, fix [#59][bug #59], edge support FMS origin server. 0.9.92
* v1.0, 2014-05-06, fix [#50][bug #50], ubuntu14 build error.
* v1.0, 2014-05-04, support mips linux.
* v1.0, 2014-04-30, fix bug [#34][bug #34]: convert signal to io thread. 0.9.85
* v1.0, 2014-04-29, refine RTMP protocol completed, to 0.9.81
* v1.0, 2014-04-28, [1.0 mainline2(0.9.79)][r1.0a2] released. 35255 lines.
* v1.0, 2014-04-28, support full edge RTMP server. 0.9.79
* v1.0, 2014-04-27, support basic edge(play/publish) RTMP server. 0.9.78
* v1.0, 2014-04-25, add donation page. 0.9.76
* v1.0, 2014-04-21, support android app to start srs for internal edge. 0.9.72
* v1.0, 2014-04-19, support tool over srs-librtmp to ingest flv/rtmp. 0.9.71
* v1.0, 2014-04-17, support dvr(record live to flv file for vod). 0.9.69
* v1.0, 2014-04-11, add speex1.2 to transcode flash encoder stream. 0.9.58
* v1.0, 2014-04-10, support reload ingesters(add/remov/update). 0.9.57
* v1.0, 2014-04-07, [1.0 mainline(0.9.55)][r1.0a0] released. 30000 lines.
* v1.0, 2014-04-07, support [ingest][v1_CN_SampleIngest] file/stream/device.
* v1.0, 2014-04-05, support [http api][v2_CN_HTTPApi] and [http server][v2_CN_HTTPServer].
* v1.0, 2014-04-03, implements http framework and api/v1/version.
* v1.0, 2014-03-30, fix bug for st detecting epoll failed, force st to use epoll.
* v1.0, 2014-03-29, add wiki [Performance for RaspberryPi][v1_CN_RaspberryPi].
* v1.0, 2014-03-29, add release binary package for raspberry-pi. 
* v1.0, 2014-03-26, support RTMP ATC for HLS/HDS to support backup(failover).
* v1.0, 2014-03-23, support daemon, default start in daemon.
* v1.0, 2014-03-22, support make install/install-api and uninstall.
* v1.0, 2014-03-22, add ./etc/init.d/srs, refine to support make clean then make.
* v1.0, 2014-03-21, write pid to ./objs/srs.pid.
* v1.0, 2014-03-20, refine hls code, support pure audio HLS.
* v1.0, 2014-03-19, add vn/an for FFMPEG to drop video/audio for radio stream.
* v1.0, 2014-03-19, refine handshake, client support complex handshake, add utest.
* v1.0, 2014-03-16, fix bug on arm of st, the sp change from 20 to 8, for respberry-pi, @see [commit][p22]
* v1.0, 2014-03-16, support ARM([debian armhf, v7cpu][v1_CN_SrsLinuxArm]) with rtmp/ssl/hls/librtmp.
* v1.0, 2014-03-12, finish utest for amf0 codec.
* v1.0, 2014-03-06, add gperftools for mem leak detect, mem/cpu profile.
* v1.0, 2014-03-04, add gest framework for utest, build success.
* v1.0, 2014-03-02, add wiki [srs-librtmp][v2_CN_SrsLibrtmp], [SRS for arm][v1_CN_SrsLinuxArm], [product][v1_CN_Product]
* v1.0, 2014-03-02, srs-librtmp, client publish/play library like librtmp.
* v1.0, 2014-03-01, modularity, extract core/kernel/rtmp/app/main module.
* v1.0, 2014-02-28, support arm build(SRS/ST), add ssl to 3rdparty package.
* v1.0, 2014-02-28, add wiki [BuildArm][v2_CN_Build], [FFMPEG][v2_CN_FFMPEG], [Reload][v1_CN_Reload]
* v1.0, 2014-02-27, add wiki [LowLatency][v2_CN_LowLatency], [HTTPCallback][v2_CN_HTTPCallback], [ServerSideScript][v1_CN_ServerSideScript], [IDE][v2_CN_IDE]
* v1.0, 2014-01-19, add wiki [DeliveryHLS][v2_CN_DeliveryHLS]
* v1.0, 2014-01-12, add wiki [HowToAskQuestion][v1_CN_HowToAskQuestion], [RtmpUrlVhost][v1_CN_RtmpUrlVhost]
* v1.0, 2014-01-11, fix jw/flower player pause bug, which send closeStream actually.
* v1.0, 2014-01-05, add wiki [Build][v2_CN_Build], [Performance][v1_CN_Performance], [Forward][v1_CN_Forward]
* v1.0, 2014-01-01, change listen(512), chunk-size(60000), to improve performance.
* v1.0, 2013-12-27, merge from wenjie, the bandwidth test feature.
* v0.9, 2013-12-25, [v0.9][r0.9] released. 20926 lines.
* v0.9, 2013-12-25, fix the bitrate bug(in Bps), use enhanced microphone.
* v0.9, 2013-12-22, demo video meeting or chat(SRS+cherrypy+jquery+bootstrap).
* v0.9, 2013-12-22, merge from wenjie, support banwidth test.
* v0.9, 2013-12-22, merge from wenjie: support set chunk size at vhost level
* v0.9, 2013-12-21, add [players](http://demo.srs.com/players) for play and publish.
* v0.9, 2013-12-15, ensure the HLS(ts) is continous when republish stream.
* v0.9, 2013-12-15, fix the hls reload bug, feed it the sequence header.
* v0.9, 2013-12-15, refine protocol, use int64_t timestamp for ts and jitter.
* v0.9, 2013-12-15, support set the live queue length(in seconds), drop when full.
* v0.9, 2013-12-15, fix the forwarder reconnect bug, feed it the sequence header.
* v0.9, 2013-12-15, support reload the hls/forwarder/transcoder.
* v0.9, 2013-12-14, refine the thread model for the retry threads.
* v0.9, 2013-12-10, auto install depends tools/libs on centos/ubuntu.
* v0.8, 2013-12-08, [v0.8][r0.8] released. 19186 lines.
* v0.8, 2013-12-08, support [http hooks][v2_CN_HTTPCallback]: on_connect/close/publish/unpublish/play/stop.
* v0.8, 2013-12-08, support multiple http hooks for a event.
* v0.8, 2013-12-07, support http callback hooks, on_connect.
* v0.8, 2013-12-07, support network based cli and json result, add CherryPy 3.2.4.
* v0.8, 2013-12-07, update http/hls/rtmp load test tool [SB][srs-bench], use SRS rtmp sdk.
* v0.8, 2013-12-06, support max_connections, drop if exceed.
* v0.8, 2013-12-05, support log_dir, write ffmpeg log to file.
* v0.8, 2013-12-05, fix the forward/hls/encoder bug.
* v0.7, 2013-12-03, [v0.7][r0.7] released. 17605 lines.
* v0.7, 2013-12-01, support dead-loop detect for forwarder and transcoder.
* v0.7, 2013-12-01, support all ffmpeg filters and params.
* v0.7, 2013-11-30, support live stream transcoder by ffmpeg.
* v0.7, 2013-11-30, support --with/without -ffmpeg, build ffmpeg-2.1.
* v0.7, 2013-11-30, add ffmpeg-2.1, x264-core138, lame-3.99.5, libaacplus-2.0.2.
* v0.6, 2013-11-29, [v0.6][r0.6] released. 16094 lines.
* v0.6, 2013-11-29, add performance summary, 1800 clients, 900Mbps, CPU 90.2%, 41MB.
* v0.6, 2013-11-29, support forward stream to other edge server.
* v0.6, 2013-11-29, support forward stream to other origin server.
* v0.6, 2013-11-28, fix memory leak bug, aac decode bug.
* v0.6, 2013-11-27, support --with or --without -hls and -ssl options.
* v0.6, 2013-11-27, support AAC 44100HZ sample rate for iphone, adjust the timestamp.
* v0.5, 2013-11-26, [v0.5][r0.5] released. 14449 lines.
* v0.5, 2013-11-24, support HLS(m3u8), fragment and window.
* v0.5, 2013-11-24, support record to ts file for HLS.
* v0.5, 2013-11-21, add ts_info tool to demux ts file.
* v0.5, 2013-11-16, add rtmp players(OSMF/jwplayer5/jwplayer6).
* v0.4, 2013-11-10, [v0.4][r0.4] released. 12500 lines.
* v0.4, 2013-11-10, support config and reload the pithy print.
* v0.4, 2013-11-09, support reload config(vhost and its detail).
* v0.4, 2013-11-09, support reload config(listen and chunk_size) by SIGHUP(1).
* v0.4, 2013-11-09, support longtime(>4.6hours) publish/play.
* v0.4, 2013-11-09, support config the chunk_size.
* v0.4, 2013-11-09, support pause for live stream.
* v0.3, 2013-11-04, [v0.3][r0.3] released. 11773 lines.
* v0.3, 2013-11-04, support refer/play-refer/publish-refer.
* v0.3, 2013-11-04, support vhosts specified config.
* v0.3, 2013-11-02, support listen multiple ports.
* v0.3, 2013-11-02, support config file in nginx-conf style.
* v0.3, 2013-10-29, support pithy print log message specified by stage.
* v0.3, 2013-10-28, support librtmp without extended-timestamp in 0xCX chunk packet.
* v0.3, 2013-10-27, support cache last gop for client fast startup.
* v0.2, 2013-10-25, [v0.2][r0.2] released. 10125 lines.
* v0.2, 2013-10-25, support flash publish.
* v0.2, 2013-10-25, support h264/avc codec by rtmp complex handshake.
* v0.2, 2013-10-24, support time jitter detect and correct algorithm
* v0.2, 2013-10-24, support decode codec type to cache the h264/avc sequence header.
* v0.1, 2013-10-23, [v0.1][r0.1] released. 8287 lines.
* v0.1, 2013-10-23, support basic amf0 codec, simplify the api using c-style api.
* v0.1, 2013-10-23, support shared ptr msg for zero memory copy.
* v0.1, 2013-10-22, support vp6 codec with rtmp protocol specified simple handshake.
* v0.1, 2013-10-20, support multiple flash client play live streaming.
* v0.1, 2013-10-20, support FMLE/FFMPEG publish live streaming.
* v0.1, 2013-10-18, support rtmp message2chunk protocol(send\_message).
* v0.1, 2013-10-17, support rtmp chunk2message protocol(recv\_message).

## Performance

Performance benchmark history, on virtual box.

* See also: [Performance for x86/x64 Test Guide][v1_CN_Performance]
* See also: [Performance for RaspberryPi][v1_CN_RaspberryPi]
* About multiple-process performance, read [srs-dolphin][srs-dolphin].

### Play RTMP benchmark

The play RTMP benchmark by [SB][srs-bench]:

|   Update      |    SRS    |    Clients    |     Type      |    CPU    |  Memory   | Commit        |
| ------------- | --------- | ------------- | ------------- | --------- | --------  | ------------  |
|   2013-11-28  |   0.5.0   |   1.8k(1800)  |   players     |   90%     |   41M     |   -           |
|   2014-07-12  |   0.9.156 |   1.8k(1800)  |   players     |   68%     |   38MB    |   -           |
|   2014-07-12  |   0.9.156 |   2.7k(2700)  |   players     |   89%     |   61MB    |   [code][p6]  |
|   2014-11-11  |   1.0.5   |   2.7k(2700)  |   players     |   85%     |   66MB    |   -           |
|   2014-11-11  |   2.0.12  |   2.7k(2700)  |   players     |   85%     |   66MB    |   -           |
|   2014-11-12  |   2.0.14  |   2.7k(2700)  |   players     |   69%     |   59MB    |   -           |
|   2014-11-12  |   2.0.14  |   3.5k(3500)  |   players     |   95%     |   78MB    |   [code][p7]  |
|   2014-11-13  |   2.0.15  |   6.0k(6000)  |   players     |   82%     |   203MB   |   [code][p8]  |
|   2014-11-22  |   2.0.30  |   7.5k(7500)  |   players     |   87%     |   320MB   |   [code][p9]  |
|   2014-12-05  |   2.0.55  |   8.0k(8000)  |   players     |   89%     |   360MB   |   [code][p10] |
|   2014-12-05  |   2.0.57  |   9.0k(9000)  |   players     |   90%     |   468MB   |   [code][p11] |
|   2014-12-07  |   2.0.67  |   10k(10000)  |   players     |   95%     |   656MB   |   [code][p12] |

### Publish RTMP benchmark

The publish RTMP benchmark by [SB][srs-bench]:

|   Update      |    SRS    |    Clients    |     Type      |    CPU    |  Memory   | Commit        |
| ------------- | --------- | ------------- | ------------- | --------- | --------  | ------------  |
|   2014-12-03  |   1.0.10  |   1.2k(1200)  |   publishers  |   96%     |   43MB    |   -           |
|   2014-12-03  |   2.0.12  |   1.2k(1200)  |   publishers  |   96%     |   43MB    |   -           |
|   2014-12-03  |   2.0.47  |   1.2k(1200)  |   publishers  |   84%     |   76MB    |   [code][p1]  |
|   2014-12-03  |   2.0.47  |   1.4k(1400)  |   publishers  |   95%     |   140MB   |   -           |
|   2014-12-03  |   2.0.48  |   1.4k(1400)  |   publishers  |   95%     |   140MB   |   [code][p2]  |
|   2014-12-04  |   2.0.49  |   1.4k(1400)  |   publishers  |   68%     |   144MB   |   -           |
|   2014-12-04  |   2.0.49  |   2.5k(2500)  |   publishers  |   95%     |   404MB   |   [code][p3]  |
|   2014-12-04  |   2.0.51  |   2.5k(2500)  |   publishers  |   91%     |   259MB   |   [code][p4]  |
|   2014-12-04  |   2.0.52  |   4.0k(4000)  |   publishers  |   80%     |   331MB   |   [code][p5]  |

### Play HTTP FLV benchmark

The play HTTP FLV benchmark by [SB][srs-bench]:

|   Update      |    SRS    |    Clients    |     Type      |    CPU    |  Memory   | Commit        |
| ------------- | --------- | ------------- | ------------- | --------- | --------  | ------------  |
|   2014-05-24  |   2.0.167 |   1.0k(1000)  |   players     |   82%     |   86MB    |   -           |
|   2014-05-24  |   2.0.168 |   2.3k(2300)  |   players     |   92%     |   276MB   |   [code][p17] |
|   2014-05-24  |   2.0.169 |   3.0k(3000)  |   players     |   94%     |   188MB   |   [code][p18] |
|   2014-05-24  |   2.0.170 |   3.0k(3000)  |   players     |   89%     |   96MB    |   [code][p19] |
|   2014-05-25  |   2.0.171 |   6.0k(6000)  |   players     |   84%     |   297MB   |   [code][p20] |

### Latency benchmark

The latency between encoder and player with realtime config([CN][v2_CN_LowLatency], [EN][v2_EN_LowLatency]):
|

|   Update      |    SRS    |    VP6    |  H.264    |  VP6+MP3  | H.264+MP3 |
| ------------- | --------- | --------- | --------- | --------- | --------  |
|   2014-12-03  |   1.0.10  |   0.4s    |   0.4s    |   0.9s    |   1.2s    |
|   2014-12-12  |   2.0.70  |[0.1s][p13]|[0.4s][p14]|   1.0s    |   0.9s    |
|   2014-12-16  |   2.0.72  |   0.1s    |   0.4s    |[0.8s][p15]|[0.6s][p16]|

> 2018-08-05, [c45f72e](https://github.com/ossrs/srs/commit/c45f72ef7bac9c7cf85b9125fc9e3aafd53f396f), Refine HTTP-FLV latency, support realtime mode. 2.0.252

We use FMLE as encoder for benchmark. The latency of server is 0.1s+, 
and the bottleneck is the encoder. For more information, read 
[bug #257][bug #257-c0].

### HLS overhead

About the HLS overhead of SRS, we compare the overhead to FLV by remux the HLS to FLV by ffmpeg.

| Bitrate   |   Duration    |   FLV(KB)     |   HLS(KB)     |   Overhead    |
| -------   |   --------    |   -------     |   --------    |   ---------   |
| 275kbps   |   600s        |   11144       |   12756       |   14.46%      |
| 260kbps   |   1860s       |   59344       |   68004       |   14.59%      |
| 697kbps   |   60s         |   5116        |   5476        |   7.03%       |
| 565kbps   |   453s        |   31316       |   33544       |   7.11%       |
| 565kbps   |   1813s       |   125224      |   134140      |   7.12%       |
| 861kbps   |   497s        |   52316       |   54924       |   4.98%       |
| 857kbps   |   1862s       |   195008      |   204768      |   5.00%       |
| 1301kbps  |   505s        |   80320       |   83676       |   4.17%       |
| 1312kbps  |   1915s       |   306920      |   319680      |   4.15%       |
| 2707kbps  |   600s        |   198356      |   204560      |   3.12%       |
| 2814kbps  |   1800s       |   618456      |   637660      |   3.10%       |
| 2828kbps  |   60s         |   20716       |   21356       |   3.08%       |
| 2599kbps  |   307s        |   97580       |   100672      |   3.16%       |
| 2640kbps  |   1283s       |   413880      |   426912      |   3.14%       |
| 5254kbps  |   71s         |   45832       |   47056       |   2.67%       |
| 5147kbps  |   370s        |   195040      |   200280      |   2.68%       |
| 5158kbps  |   1327s       |   835664      |   858092      |   2.68%       |

The HLS overhead is calc by: (HLS - FLV) / FLV * 100%.

The overhead is larger than this benchmark(48kbps audio is best overhead), for we fix the [#512][bug #512].

## Architecture

SRS always use the most simple architecture to support complex transaction.
* System arch: the system structure and arch.
* Modularity arch: the main modularity of SRS.
* Stream arch: the stream dispatch arch of SRS.

### System Architecture

### Modularity Architecture

<pre>
+------------------------------------------------------+
| Main(srs/ingest-hls/librtmp) |
+------------------------------------------------------+
| App(Server/Client application) |
+------------------------------------------------------+
| RTMP/HTTP/RawStream(Protocol stack) |
+------------------------------------------------------+
| Kernel(depends on Core, provides error/log) |
+------------------------------------------------------+
| Core(depends only on system apis) |
+------------------------------------------------------+
</pre>

### Stream Architecture

<pre>
 +---------+ +----------+
 | Publish | | Deliver |
 +---|-----+ +----|-----+
+----------------------+-------------------------+----------------+
| Input | SRS(Simple RTMP Server) | Output |
+----------------------+-------------------------+----------------+
| Encoder(1) | +-> RTMP/HDS --------+-> Flash player |
| (FMLE,FFMPEG, -rtmp-+->-+-> HLS/HTTP ---------+-> M3u8 player |
| Flash,XSPLIT, | +-> FLV/MP3/Aac/Ts ---+-> HTTP player |
| ......) | +-> Fowarder ---------+-> RTMP server |
| | +-> Transcoder -------+-> RTMP server |
| | +-> DVR --------------+-> Flv file |
| | +-> BandwidthTest ----+-> flash |
+----------------------+ | |
| MediaSource(2) | | |
| (RTSP,FILE, | | |
| HTTP,HLS, --pull-+->-- Ingester(3) -(rtmp)-+-> SRS |
| Device, | | |
| ......) | | |
+----------------------+ | |
| MediaSource(2) | | |
| (RTSP,FILE, | | |
| HTTP,HLS, --push-+->-- Streamer(4) -(rtmp)-+-> SRS |
| Device, | | |
| ......) | | |
+----------------------+-------------------------+----------------+

Remark:
(1) Encoder: encoder must push RTMP stream to SRS server.
(2) MediaSource: any media source, which can be ingest by ffmpeg.
(3) Ingester: SRS will fork a process to run ffmpeg(or your application) 
to ingest any input to rtmp, push to SRS. Read <a href="https://github.com/ossrs/srs/wiki/v1_CN_Ingest">Ingest</a>.
(4) Streamer: SRS will listen for some protocol and accept stream push 
over some protocol and remux to rtmp to SRS. Read <a href="https://github.com/ossrs/srs/wiki/v2_CN_Streamer">Streamer</a>.
</pre>

Beijing, 2013.10 
Winlin

[p1]: https://github.com/ossrs/srs/commit/787ab674e38734ea8e0678101614fdcd84645dc8
[p2]: https://github.com/ossrs/srs/commit/f35ec2155b1408d528a9f37da7904c9625186bcf
[p3]: https://github.com/ossrs/srs/commit/29324fab469e0f7cef9ad04ffdbce832ac7dd9ff
[p4]: https://github.com/ossrs/srs/commit/f57801eb46c16755b173984b915a4166922df6a6
[p5]: https://github.com/ossrs/srs/commit/5589b13d2e216b91f97afb78ee0c011b2fccf7da
[p6]: https://github.com/ossrs/srs/commit/1ae3e6c64cc5cee90e6050c26968ebc3c18281be
[p7]: https://github.com/ossrs/srs/commit/8acd143a7a152885b815999162660fd4e7a3f247
[p8]: https://github.com/ossrs/srs/commit/cc6aca9ad55342a06440ce7f3b38453776b2b2d1
[p9]: https://github.com/ossrs/srs/commit/58136ec178e3d47db6c90a59875d7e40946936e5
[p10]: https://github.com/ossrs/srs/commit/58136ec178e3d47db6c90a59875d7e40946936e5
[p11]: https://github.com/ossrs/srs/commit/9ee138746f83adc26f0e236ec017f4d68a300004
[p12]: https://github.com/ossrs/srs/commit/1311b6fe6576fd7b9c6d299b0f8f2e8d202f4bf8
[p13]: https://github.com/ossrs/srs/commit/10297fab519811845b549a8af40a6bcbd23411e8
[p14]: https://github.com/ossrs/srs/commit/10297fab519811845b549a8af40a6bcbd23411e8
[p15]: https://github.com/ossrs/srs/commit/0d6b91039d408328caab31a1077d56a809b6bebc
[p16]: https://github.com/ossrs/srs/commit/0d6b91039d408328caab31a1077d56a809b6bebc
[p17]: https://github.com/ossrs/srs/commit/fc995473eb02c7cf64b5b212b456e11f34aa7984
[p18]: https://github.com/ossrs/srs/commit/960341b9b2b9646270ccfd113b4dd784d9826c73
[p19]: https://github.com/ossrs/srs/commit/4df19ba99a4e4d80cd89b304f9298d343497bec9
[p20]: https://github.com/ossrs/srs/commit/d12fc7fcc5b2e9e3c8ee5c7da01d0e41c8f8ca4a
[p21]: https://github.com/ossrs/srs/commit/87519aaae835199e5adb60c0ae2c1cd24939448c
[p22]: https://github.com/ossrs/srs/commit/5a4373d4835758188b9a1f03005cea0b6ddc62aa
[p23]: https://github.com/ossrs/srs/pull/239
[pr #558]: https://github.com/ossrs/srs/pull/558
[pr #559]: https://github.com/ossrs/srs/pull/559

[authors]: https://github.com/ossrs/srs/blob/develop/AUTHORS.txt
[bigthanks]: https://github.com/ossrs/srs/wiki/v1_CN_Product#bigthanks
[st]: https://github.com/winlinvip/state-threads
[st2]: http://sourceforge.net/projects/state-threads/
[state-threads]: http://sourceforge.net/projects/state-threads/
[nginx-rtmp]: https://github.com/arut/nginx-rtmp-module
[http-parser]: https://github.com/joyent/http-parser
[nginx]: http://nginx.org/
[FFMPEG]: http://ffmpeg.org/
[libx264]: http://www.videolan.org/
[srs]: https://github.com/ossrs/srs
[csdn]: https://code.csdn.net/winlinvip/srs-csdn
[oschina]: http://git.oschina.net/winlinvip/srs.oschina
[srs-dolphin]: https://github.com/ossrs/srs-dolphin
[srs-bench]: https://github.com/ossrs/srs-bench
[srs-ngb]: https://github.com/ossrs/srs-ngb
[srs-librtmp]: https://github.com/ossrs/srs-librtmp
[gitlab]: https://gitlab.com/winlinvip/srs-gitlab
[console]: http://ossrs.net:1985/console
[docker]: https://github.com/ossrs/srs-docker/tree/centos#usage

[v1_CN_Git]: https://github.com/ossrs/srs/wiki/v1_CN_Git
[v1_EN_Git]: https://github.com/ossrs/srs/wiki/v1_EN_Git
[v1_CN_SampleRTMP]: https://github.com/ossrs/srs/wiki/v1_CN_SampleRTMP
[v1_EN_SampleRTMP]: https://github.com/ossrs/srs/wiki/v1_EN_SampleRTMP
[v1_CN_SampleRTMPCluster]: https://github.com/ossrs/srs/wiki/v1_CN_SampleRTMPCluster
[v1_EN_SampleRTMPCluster]: https://github.com/ossrs/srs/wiki/v1_EN_SampleRTMPCluster
[v2_CN_SampleHLS]: https://github.com/ossrs/srs/wiki/v2_CN_SampleHLS
[v2_EN_SampleHLS]: https://github.com/ossrs/srs/wiki/v2_EN_SampleHLS
[v2_CN_SampleTranscode2HLS]: https://github.com/ossrs/srs/wiki/v2_CN_SampleTranscode2HLS
[v2_EN_SampleTranscode2HLS]: https://github.com/ossrs/srs/wiki/v2_EN_SampleTranscode2HLS
[v2_CN_SampleFFMPEG]: https://github.com/ossrs/srs/wiki/v2_CN_SampleFFMPEG
[v2_EN_SampleFFMPEG]: https://github.com/ossrs/srs/wiki/v2_EN_SampleFFMPEG
[v1_CN_SampleForward]: https://github.com/ossrs/srs/wiki/v1_CN_SampleForward
[v1_EN_SampleForward]: https://github.com/ossrs/srs/wiki/v1_EN_SampleForward
[v2_CN_SampleRealtime]: https://github.com/ossrs/srs/wiki/v2_CN_SampleRealtime
[v2_EN_SampleRealtime]: https://github.com/ossrs/srs/wiki/v2_EN_SampleRealtime
[v1_CN_SampleARM]: https://github.com/ossrs/srs/wiki/v1_CN_SampleARM
[v1_EN_SampleARM]: https://github.com/ossrs/srs/wiki/v1_EN_SampleARM
[v1_CN_SampleIngest]: https://github.com/ossrs/srs/wiki/v1_CN_SampleIngest
[v1_EN_SampleIngest]: https://github.com/ossrs/srs/wiki/v1_EN_SampleIngest
[v2_CN_SampleHTTP]: https://github.com/ossrs/srs/wiki/v2_CN_SampleHTTP
[v2_EN_SampleHTTP]: https://github.com/ossrs/srs/wiki/v2_EN_SampleHTTP
[v1_CN_SampleDemo]: https://github.com/ossrs/srs/wiki/v1_CN_SampleDemo
[v1_EN_SampleDemo]: https://github.com/ossrs/srs/wiki/v1_EN_SampleDemo
[v2_CN_SrsLibrtmp2]: https://github.com/ossrs/srs/wiki/v2_CN_SrsLibrtmp#publish-h264-raw-data
[v2_EN_SrsLibrtmp2]: https://github.com/ossrs/srs/wiki/v2_EN_SrsLibrtmp#publish-h264-raw-data
[v1_CN_Sample]: https://github.com/ossrs/srs/wiki/v1_CN_Sample
[v1_EN_Sample]: https://github.com/ossrs/srs/wiki/v1_EN_Sample
[v1_CN_Product]: https://github.com/ossrs/srs/wiki/v1_CN_Product
[v1_EN_Product]: https://github.com/ossrs/srs/wiki/v1_EN_Product
[v1_CN_Home]: https://github.com/ossrs/srs/wiki/v1_CN_Home
[v1_EN_Home]: https://github.com/ossrs/srs/wiki/v1_EN_Home
[v2_CN_Home]: https://github.com/ossrs/srs/wiki/v2_CN_Home
[v2_EN_Home]: https://github.com/ossrs/srs/wiki/v2_EN_Home
[donation0]: http://winlinvip.github.io/srs.release/donation/index.html
[donation1]: http://www.ossrs.net/srs.release/donation/index.html
[donations]: https://github.com/ossrs/srs/blob/develop/DONATIONS.txt

[v2_CN_Build]: https://github.com/ossrs/srs/wiki/v2_CN_Build
[v2_EN_Build]: https://github.com/ossrs/srs/wiki/v2_EN_Build
[v1_CN_Performance]: https://github.com/ossrs/srs/wiki/v1_CN_Performance
[v1_EN_Performance]: https://github.com/ossrs/srs/wiki/v1_EN_Performance
[v1_CN_DeliveryRTMP]: https://github.com/ossrs/srs/wiki/v1_CN_DeliveryRTMP
[v1_EN_DeliveryRTMP]: https://github.com/ossrs/srs/wiki/v1_EN_DeliveryRTMP
[v2_CN_Edge]: https://github.com/ossrs/srs/wiki/v2_CN_Edge
[v2_EN_Edge]: https://github.com/ossrs/srs/wiki/v2_EN_Edge
[v1_CN_RtmpUrlVhost]: https://github.com/ossrs/srs/wiki/v1_CN_RtmpUrlVhost
[v1_EN_RtmpUrlVhost]: https://github.com/ossrs/srs/wiki/v1_EN_RtmpUrlVhost
[v1_CN_RTMPHandshake]: https://github.com/ossrs/srs/wiki/v1_CN_RTMPHandshake
[v1_EN_RTMPHandshake]: https://github.com/ossrs/srs/wiki/v1_EN_RTMPHandshake
[v2_CN_HTTPServer]: https://github.com/ossrs/srs/wiki/v2_CN_HTTPServer
[v2_EN_HTTPServer]: https://github.com/ossrs/srs/wiki/v2_EN_HTTPServer
[v2_CN_DeliveryHLS]: https://github.com/ossrs/srs/wiki/v2_CN_DeliveryHLS
[v2_EN_DeliveryHLS]: https://github.com/ossrs/srs/wiki/v2_EN_DeliveryHLS
[v2_CN_DeliveryHLS2]: https://github.com/ossrs/srs/wiki/v2_CN_DeliveryHLS#hlsaudioonly
[v2_EN_DeliveryHLS2]: https://github.com/ossrs/srs/wiki/v2_EN_DeliveryHLS#hlsaudioonly
[v1_CN_Reload]: https://github.com/ossrs/srs/wiki/v1_CN_Reload
[v1_EN_Reload]: https://github.com/ossrs/srs/wiki/v1_EN_Reload
[v2_CN_LowLatency2]: https://github.com/ossrs/srs/wiki/v2_CN_LowLatency#gop-cache
[v2_EN_LowLatency2]: https://github.com/ossrs/srs/wiki/v2_EN_LowLatency#gop-cache
[v1_CN_Forward]: https://github.com/ossrs/srs/wiki/v1_CN_Forward
[v1_EN_Forward]: https://github.com/ossrs/srs/wiki/v1_EN_Forward
[v2_CN_FFMPEG]: https://github.com/ossrs/srs/wiki/v2_CN_FFMPEG
[v2_EN_FFMPEG]: https://github.com/ossrs/srs/wiki/v2_EN_FFMPEG
[v2_CN_HTTPCallback]: https://github.com/ossrs/srs/wiki/v2_CN_HTTPCallback
[v2_EN_HTTPCallback]: https://github.com/ossrs/srs/wiki/v2_EN_HTTPCallback
[v1_CN_BandwidthTestTool]: https://github.com/ossrs/srs/wiki/v1_CN_BandwidthTestTool
[v1_EN_BandwidthTestTool]: https://github.com/ossrs/srs/wiki/v1_EN_BandwidthTestTool
[v1_CN_SampleDemo]: https://github.com/ossrs/srs/wiki/v1_CN_SampleDemo
[v1_EN_SampleDemo]: https://github.com/ossrs/srs/wiki/v1_EN_SampleDemo
[v2_CN_SrsLibrtmp]: https://github.com/ossrs/srs/wiki/v2_CN_SrsLibrtmp
[v2_EN_SrsLibrtmp]: https://github.com/ossrs/srs/wiki/v2_EN_SrsLibrtmp
[v1_CN_SrsLinuxArm]: https://github.com/ossrs/srs/wiki/v1_CN_SrsLinuxArm
[v1_EN_SrsLinuxArm]: https://github.com/ossrs/srs/wiki/v1_EN_SrsLinuxArm
[v1_CN_LinuxService]: https://github.com/ossrs/srs/wiki/v1_CN_LinuxService
[v1_EN_LinuxService]: https://github.com/ossrs/srs/wiki/v1_EN_LinuxService
[v1_CN_RTMP-ATC]: https://github.com/ossrs/srs/wiki/v1_CN_RTMP-ATC
[v1_EN_RTMP-ATC]: https://github.com/ossrs/srs/wiki/v1_EN_RTMP-ATC
[v2_CN_HTTPApi]: https://github.com/ossrs/srs/wiki/v2_CN_HTTPApi
[v2_EN_HTTPApi]: https://github.com/ossrs/srs/wiki/v2_EN_HTTPApi
[v1_CN_Ingest]: https://github.com/ossrs/srs/wiki/v1_CN_Ingest
[v1_EN_Ingest]: https://github.com/ossrs/srs/wiki/v1_EN_Ingest
[v2_CN_DVR]: https://github.com/ossrs/srs/wiki/v2_CN_DVR
[v2_EN_DVR]: https://github.com/ossrs/srs/wiki/v2_EN_DVR
[v1_CN_SrsLog]: https://github.com/ossrs/srs/wiki/v1_CN_SrsLog
[v1_EN_SrsLog]: https://github.com/ossrs/srs/wiki/v1_EN_SrsLog
[v1_CN_DRM2]: https://github.com/ossrs/srs/wiki/v1_CN_DRM#tokentraverse
[v1_EN_DRM2]: https://github.com/ossrs/srs/wiki/v1_EN_DRM#tokentraverse
[v2_CN_SampleHTTP]: https://github.com/ossrs/srs/wiki/v2_CN_SampleHTTP
[v2_EN_SampleHTTP]: https://github.com/ossrs/srs/wiki/v2_EN_SampleHTTP
[v2_CN_FlvVodStream]: https://github.com/ossrs/srs/wiki/v2_CN_FlvVodStream
[v2_EN_FlvVodStream]: https://github.com/ossrs/srs/wiki/v2_EN_FlvVodStream
[v2_CN_SrsLibrtmp2]: https://github.com/ossrs/srs/wiki/v2_CN_SrsLibrtmp#publish-h264-raw-data
[v2_EN_SrsLibrtmp2]: https://github.com/ossrs/srs/wiki/v2_EN_SrsLibrtmp#publish-h264-raw-data
[v2_CN_SrsLibrtmp3]: https://github.com/ossrs/srs/wiki/v2_CN_SrsLibrtmp#publish-audio-raw-stream
[v2_EN_SrsLibrtmp3]: https://github.com/ossrs/srs/wiki/v2_EN_SrsLibrtmp#publish-audio-raw-stream
[v2_CN_Security]: https://github.com/ossrs/srs/wiki/v2_CN_Security
[v2_EN_Security]: https://github.com/ossrs/srs/wiki/v2_EN_Security
[v2_CN_DeliveryHttpStream]: https://github.com/ossrs/srs/wiki/v2_CN_DeliveryHttpStream
[v2_EN_DeliveryHttpStream]: https://github.com/ossrs/srs/wiki/v2_EN_DeliveryHttpStream
[v2_CN_DeliveryHDS]: https://github.com/ossrs/srs/wiki/v2_CN_DeliveryHDS
[v2_EN_DeliveryHDS]: https://github.com/ossrs/srs/wiki/v2_EN_DeliveryHDS
[v2_CN_Streamer2]: https://github.com/ossrs/srs/wiki/v2_CN_Streamer#push-http-flv-to-srs
[v2_EN_Streamer2]: https://github.com/ossrs/srs/wiki/v2_EN_Streamer#push-http-flv-to-srs
[v2_CN_SampleHttpFlv]: https://github.com/ossrs/srs/wiki/v2_CN_SampleHttpFlv
[v2_EN_SampleHttpFlv]: https://github.com/ossrs/srs/wiki/v2_EN_SampleHttpFlv
[v2_CN_SampleHttpFlvCluster]: https://github.com/ossrs/srs/wiki/v2_CN_SampleHttpFlvCluster
[v2_EN_SampleHttpFlvCluster]: https://github.com/ossrs/srs/wiki/v2_EN_SampleHttpFlvCluster
[v2_CN_LowLatency]: https://github.com/ossrs/srs/wiki/v2_CN_LowLatency
[v2_EN_LowLatency]: https://github.com/ossrs/srs/wiki/v2_EN_LowLatency
[v2_EN_LowLatency#merged-read]: https://github.com/ossrs/srs/wiki/v2_EN_LowLatency#merged-read
[v1_CN_Performance#performancereport4k]: https://github.com/ossrs/srs/wiki/v1_CN_Performance#performancereport4k
[v1_CN_DRM#tokentraverse]: https://github.com/ossrs/srs/wiki/v1_CN_DRM#tokentraverse
[v1_CN_RaspberryPi]: https://github.com/ossrs/srs/wiki/v1_CN_RaspberryPi
[v2_CN_SrsLibrtmp]: https://github.com/ossrs/srs/wiki/v2_CN_SrsLibrtmp
[v2_CN_Build]: https://github.com/ossrs/srs/wiki/v2_CN_Build
[v2_CN_LowLatency]: https://github.com/ossrs/srs/wiki/v2_CN_LowLatency
[v1_CN_HowToAskQuestion]: https://github.com/ossrs/srs/wiki/v1_CN_HowToAskQuestion
[v2_CN_Build]: https://github.com/ossrs/srs/wiki/v2_CN_Build
[v1_CN_Performance]: https://github.com/ossrs/srs/wiki/v1_CN_Performance
[v1_CN_RaspberryPi]: https://github.com/ossrs/srs/wiki/v1_CN_RaspberryPi
[v2_CN_LowLatency#merged-read]: https://github.com/ossrs/srs/wiki/v2_CN_LowLatency#merged-read
[v1_CN_Product]: https://github.com/ossrs/srs/wiki/v1_CN_Product
[v1_CN_ServerSideScript]: https://github.com/ossrs/srs/wiki/v1_CN_ServerSideScript
[v2_EN_LowLatency#merged-write]: https://github.com/ossrs/srs/wiki/v2_EN_LowLatency#merged-write
[v2_CN_IDE]: https://github.com/ossrs/srs/wiki/v2_CN_IDE
[v2_CN_LowLatency#merged-write]: https://github.com/ossrs/srs/wiki/v2_CN_LowLatency#merged-write

[bug #213]: https://github.com/ossrs/srs/issues/213
[bug #194]: https://github.com/ossrs/srs/issues/194
[bug #182]: https://github.com/ossrs/srs/issues/182
[bug #257]: https://github.com/ossrs/srs/issues/257
[bug #179]: https://github.com/ossrs/srs/issues/179
[bug #224]: https://github.com/ossrs/srs/issues/224
[bug #251]: https://github.com/ossrs/srs/issues/251
[bug #293]: https://github.com/ossrs/srs/issues/293
[bug #250]: https://github.com/ossrs/srs/issues/250
[bug #301]: https://github.com/ossrs/srs/issues/301
[bug #304]: https://github.com/ossrs/srs/issues/304
[bug #133]: https://github.com/ossrs/srs/issues/133
[bug #92]: https://github.com/ossrs/srs/issues/92
[bug #380]: https://github.com/ossrs/srs/issues/380
[bug #474]: https://github.com/ossrs/srs/issues/474
[bug #484]: https://github.com/ossrs/srs/issues/484
[bug #485]: https://github.com/ossrs/srs/issues/485
[bug #495]: https://github.com/ossrs/srs/issues/495
[bug #497]: https://github.com/ossrs/srs/issues/497
[bug #448]: https://github.com/ossrs/srs/issues/448
[bug #475]: https://github.com/ossrs/srs/issues/475
[bug #458]: https://github.com/ossrs/srs/issues/458
[bug #454]: https://github.com/ossrs/srs/issues/454
[bug #442]: https://github.com/ossrs/srs/issues/442
[bug #169]: https://github.com/ossrs/srs/issues/169
[bug #441]: https://github.com/ossrs/srs/issues/441
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[bug #241]: https://github.com/ossrs/srs/issues/241
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[bug #1045]: https://github.com/ossrs/srs/issues/1045
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[bug #1263]: https://github.com/ossrs/srs/issues/1263
[bug #1261]: https://github.com/ossrs/srs/issues/1261
[bug #1274]: https://github.com/ossrs/srs/pull/1274
[bug #1339]: https://github.com/ossrs/srs/pull/1339
[bug #1312]: https://github.com/ossrs/srs/pull/1312
[bug #xxxxxxxxxx]: https://github.com/ossrs/srs/issues/xxxxxxxxxx

[exo #828]: https://github.com/google/ExoPlayer/pull/828

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[contact]: https://github.com/ossrs/srs/wiki/v1_CN_Contact
[more0]: http://winlinvip.github.io/srs.release/releases/
[more1]: http://www.ossrs.net/srs.release/releases/

[srs_CN]: https://github.com/ossrs/srs/wiki/v2_CN_Home
[srs_EN]: https://github.com/ossrs/srs/wiki/v2_EN_Home
[branch1]: https://github.com/ossrs/srs/tree/1.0release
[branch2]: https://github.com/ossrs/srs/tree/2.0release
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[release3]: https://github.com/ossrs/srs/wiki/v1_CN_Product#release30
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