# SRS(Simple Realtime Server)
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[](https://twitter.com/srs_server)
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[](https://github.com/ossrs/srs/issues/2716)
[](https://stackoverflow.com/questions/tagged/simple-realtime-server)
[](https://opencollective.com/srs-server/contribute)
[](http://mulanos.cn)
[](https://hub.docker.com/r/ossrs/srs/tags)
[](https://cloud.digitalocean.com/droplets/new?appId=104916642&size=s-1vcpu-1gb®ion=sgp1&image=ossrs-srs&type=applications)
SRS/5.0 is a simple, high efficiency and realtime video server, supports RTMP/WebRTC/HLS/HTTP-FLV/SRT.
SRS/5.0，[Bee](https://github.com/ossrs/srs/wiki/Product#release50) 是一个简单高效的实时视频服务器，支持RTMP/WebRTC/HLS/HTTP-FLV/SRT。
[](https://ossrs.net/wiki/images/SRS-SingleNode-4.0-hd.png)
> Note: The single node architecture for SRS, for detail please see [here](https://www.figma.com/file/333POxVznQ8Wz1Rxlppn36/SRS-4.0-Server-Arch).
SRS is licenced under [MIT](https://github.com/ossrs/srs/blob/develop/LICENSE) or [MulanPSL-2.0](https://spdx.org/licenses/MulanPSL-2.0.html),
and note that [MulanPSL-2.0 is compatible with Apache-2.0](https://www.apache.org/legal/resolved.html#category-a),
but some third-party libraries are distributed using their [own licenses](https://github.com/ossrs/srs/wiki/LicenseMixing).
## Usage
Build SRS from source:
```
git clone -b develop https://gitee.com/ossrs/srs.git &&
cd srs/trunk && ./configure && make && ./objs/srs -c conf/srs.conf
```
Open [http://localhost:8080/](http://localhost:8080/) to check it, then publish
by [FFmpeg](https://ffmpeg.org/download.html) or [OBS](https://obsproject.com/download) as:
```bash
ffmpeg -re -i ./doc/source.flv -c copy -f flv -y rtmp://localhost/live/livestream
```
Play the following streams by [players](https://ossrs.net):
* RTMP (by [VLC](https://www.videolan.org/)): rtmp://localhost/live/livestream
* H5(HTTP-FLV): [http://localhost:8080/live/livestream.flv](http://localhost:8080/players/srs_player.html?autostart=true&stream=livestream.flv&port=8080&schema=http)
* H5(HLS): [http://localhost:8080/live/livestream.m3u8](http://localhost:8080/players/srs_player.html?autostart=true&stream=livestream.m3u8&port=8080&schema=http)
Note that if convert RTMP to WebRTC, please use [`rtmp2rtc.conf`](https://github.com/ossrs/srs/issues/2728#issuecomment-964686152):
* H5(WebRTC): [webrtc://localhost/live/livestream](http://localhost:8080/players/rtc_player.html?autostart=true)
> Note: Besides of FFmpeg or OBS, it's also able to [publish by H5](http://localhost:8080/players/rtc_publisher.html?autostart=true)
> if **WebRTC([CN](https://github.com/ossrs/srs/wiki/v4_CN_WebRTC#rtc-to-rtmp), [EN](https://github.com/ossrs/srs/wiki/v4_EN_WebRTC#rtc-to-rtmp))** is enabled,
> please remember to set the **CANDIDATE([CN](https://github.com/ossrs/srs/wiki/v4_CN_WebRTC#config-candidate) or [EN](https://github.com/ossrs/srs/wiki/v4_EN_WebRTC#config-candidate))** for WebRTC.
> Highly recommend that directly run SRS by
> **docker([CN](https://github.com/ossrs/srs/wiki/v4_CN_Home#docker) / [EN](https://github.com/ossrs/srs/wiki/v4_EN_Home#docker))**,
> **Cloud Virtual Machine([CN](https://github.com/ossrs/srs/wiki/v4_CN_Home#cloud-virtual-machine) / [EN](https://github.com/ossrs/srs/wiki/v4_EN_Home#cloud-virtual-machine))**,
> or **K8s([CN](https://github.com/ossrs/srs/wiki/v4_CN_Home#k8s) / [EN](https://github.com/ossrs/srs/wiki/v4_EN_Home#k8s))**,
> however it's also easy to build SRS from source code, for detail please see
> **Getting Started([CN](https://github.com/ossrs/srs/wiki/v4_CN_Home#getting-started) / [EN](https://github.com/ossrs/srs/wiki/v4_EN_Home#getting-started))**.
> Note: If need HTTPS, by which WebRTC and modern browsers require, please read
> **HTTPS API([CN](https://github.com/ossrs/srs/wiki/v4_CN_HTTPApi#https-api) / [EN](https://github.com/ossrs/srs/wiki/v4_EN_HTTPApi#https-api))**
> and **HTTPS Callback([CN](https://github.com/ossrs/srs/wiki/v4_CN_HTTPCallback#https-callback) / [EN](https://github.com/ossrs/srs/wiki/v4_EN_HTTPCallback#https-callback))**
> and **HTTPS Live Streaming([CN](https://github.com/ossrs/srs/wiki/v4_EN_DeliveryHttpStream#https-flv-live-stream) / [EN](https://github.com/ossrs/srs/wiki/v4_EN_DeliveryHttpStream#https-flv-live-stream))**,
> however HTTPS proxy also works perfect with SRS such as Nginx.
From here, please read wikis:
* [Getting Started](https://github.com/ossrs/srs/wiki/v4_EN_Home#getting-started), please read Wiki first.
* [中文文档：起步](https://github.com/ossrs/srs/wiki/v4_CN_Home#getting-started)，不读Wiki一定扑街，不读文档请不要提Issue，不读文档请不要提问题，任何文档中明确说过的疑问都不会解答。
Fast index for Wikis:
* Overview? ([CN](https://github.com/ossrs/srs/wiki/v4_CN_Home), [EN](https://github.com/ossrs/srs/wiki/v4_EN_Home))
* How to deliver RTMP streaming?([CN](https://github.com/ossrs/srs/wiki/v4_CN_SampleRTMP), [EN](https://github.com/ossrs/srs/wiki/v4_EN_SampleRTMP))
* How to deliver WebRTC streaming? ([CN](https://github.com/ossrs/srs/wiki/v4_CN_WebRTC), [EN](https://github.com/ossrs/srs/wiki/v4_EN_WebRTC))
* How to covert RTMP to HTTP-FLV streaming?([CN](https://github.com/ossrs/srs/wiki/v4_CN_SampleHttpFlv), [EN](https://github.com/ossrs/srs/wiki/v4_EN_SampleHttpFlv))
* How to covert RTMP to HLS streaming?([CN](https://github.com/ossrs/srs/wiki/v4_CN_SampleHLS), [EN](https://github.com/ossrs/srs/wiki/v4_EN_SampleHLS))
* How to deliver low-latency streaming?([CN](https://github.com/ossrs/srs/wiki/v4_CN_SampleRealtime), [EN](https://github.com/ossrs/srs/wiki/v4_EN_SampleRealtime))
* How to build RTMP Edge-Cluster?([CN](https://github.com/ossrs/srs/wiki/v4_CN_SampleRTMPCluster), [EN](https://github.com/ossrs/srs/wiki/v4_EN_SampleRTMPCluster))
* How to build RTMP Origin-Cluster?([CN](https://github.com/ossrs/srs/wiki/v4_CN_SampleOriginCluster), [EN](https://github.com/ossrs/srs/wiki/v4_EN_SampleOriginCluster))
* How to build HLS Edge-Cluster?([CN](https://github.com/ossrs/srs/wiki/v4_CN_SampleHlsCluster), [EN](https://github.com/ossrs/srs/wiki/v4_EN_SampleHlsCluster))
Other important wiki:
* Usage: How to deliver DASH(Experimental)?([CN](https://github.com/ossrs/srs/wiki/v4_CN_SampleDASH), [EN](https://github.com/ossrs/srs/wiki/v4_EN_SampleDASH))
* Usage: How to transode RTMP stream by FFMPEG?([CN](https://github.com/ossrs/srs/wiki/v4_CN_SampleFFMPEG), [EN](https://github.com/ossrs/srs/wiki/v4_EN_SampleFFMPEG))
* Usage: How to deliver HTTP FLV Live Streaming Cluster?([CN](https://github.com/ossrs/srs/wiki/v4_CN_SampleHttpFlvCluster), [EN](https://github.com/ossrs/srs/wiki/v4_EN_SampleHttpFlvCluster))
* Usage: How to deliver HLS by NGINX Cluster?([CN](https://github.com/ossrs/srs/wiki/v4_CN_SampleHlsCluster), [EN](https://github.com/ossrs/srs/wiki/v4_EN_SampleHlsCluster))
* Usage: How to ingest file/stream/device to RTMP?([CN](https://github.com/ossrs/srs/wiki/v4_CN_SampleIngest), [EN](https://github.com/ossrs/srs/wiki/v4_EN_SampleIngest))
* Usage: How to forward stream to other servers?([CN](https://github.com/ossrs/srs/wiki/v4_CN_SampleForward), [EN](https://github.com/ossrs/srs/wiki/v4_EN_SampleForward))
* Usage: How to improve edge performance for multiple CPUs? ([CN](https://github.com/ossrs/srs/wiki/v4_CN_REUSEPORT), [EN](https://github.com/ossrs/srs/wiki/v4_EN_REUSEPORT))
* Usage: How to file a bug or contact us? ([CN](https://github.com/ossrs/srs/wiki/v4_CN_Contact), [EN](https://github.com/ossrs/srs/wiki/v4_EN_Contact))
## AUTHORS
Thank you to all our contributors! 🙏
[](https://opencollective.com/srs-server/contribute)
> Note: You may provide financial support for this project by donating [via Open Collective](https://opencollective.com/srs-server/contribute). Thank you for your support!
The [TOC(Technical Oversight Committee)](trunk/AUTHORS.md#toc), [Developers](trunk/AUTHORS.md#developers) and [contributors](trunk/AUTHORS.md#contributors):
* [Winlin](https://github.com/winlinvip): Focus on [ST](https://github.com/ossrs/state-threads) and [Issues/PR](https://github.com/ossrs/srs/issues).
* [ZhaoWenjie](https://github.com/wenjiegit): Focus on [HDS](https://github.com/simple-rtmp-server/srs/wiki/v4_CN_DeliveryHDS) and [Windows](https://github.com/ossrs/srs/issues/2532).
* [ShiWei](https://github.com/runner365): Focus on [SRT](https://github.com/simple-rtmp-server/srs/wiki/v4_CN_SRTWiki) and [H.265](https://github.com/ossrs/srs/issues/465).
* [XiaoZhihong](https://github.com/xiaozhihong): Focus on [WebRTC/QUIC](https://github.com/ossrs/srs/issues/2091) and [SRT](https://github.com/simple-rtmp-server/srs/wiki/v4_CN_SRTWiki).
* [WuPengqiang](https://github.com/Bepartofyou): Focus on [H.265](https://github.com/ossrs/srs/issues/465).
* [XiaLixin](https://github.com/xialixin): Focus on [GB28181](https://github.com/ossrs/srs/issues/1500).
* [LiPeng](https://github.com/lipeng19811218): Focus on [WebRTC](https://github.com/simple-rtmp-server/srs/wiki/v4_CN_WebRTC).
* [ChenGuanghua](https://github.com/chen-guanghua): Focus on [WebRTC/QoS](https://github.com/ossrs/srs/issues/2051).
* [ChenHaibo](https://github.com/duiniuluantanqin): Focus on [GB28181](https://github.com/ossrs/srs/issues/1500) and [API](https://github.com/ossrs/srs/issues/1657).
A big `THANK YOU` also goes to:
* All [contributors](trunk/AUTHORS.md#contributors) of SRS.
* All friends of SRS for [big supports](https://github.com/ossrs/srs/wiki/Product).
* [Genes](http://sourceforge.net/users/genes), [Mabbott](http://sourceforge.net/users/mabbott) and [Michael Talyanksy](https://github.com/michaeltalyansky) for creating and introducing [st](https://github.com/ossrs/state-threads/tree/srs).
## Contributing
We are grateful to the community for contributing bugfix and improvements, please follow the
[guide](https://github.com/ossrs/srs/contribute).
## LICENSE
[](https://app.fossa.com/projects/git%2Bgithub.com%2Fossrs%2Fsrs?ref=badge_small)
SRS is licenced under [MIT](https://github.com/ossrs/srs/blob/develop/LICENSE) or [MulanPSL-2.0](https://spdx.org/licenses/MulanPSL-2.0.html),
and note that [MulanPSL-2.0 is compatible with Apache-2.0](https://www.apache.org/legal/resolved.html#category-a),
but some third-party libraries are distributed using their [own licenses](https://github.com/ossrs/srs/wiki/LicenseMixing).
[](https://app.fossa.com/projects/git%2Bgithub.com%2Fossrs%2Fsrs?ref=badge_large)
## Releases
* 2022-03-19, Release [v4.0-b10](https://github.com/ossrs/srs/releases/tag/v4.0-b10), v4.0-b10, 4.0 beta10, v4.0.251, 144665 lines.
* 2022-02-15, Release [v4.0-b9](https://github.com/ossrs/srs/releases/tag/v4.0-b9), v4.0-b9, 4.0 beta9, v4.0.245, 144474 lines.
* 2022-02-11, Release [v4.0-b8](https://github.com/ossrs/srs/releases/tag/v4.0-b8), v4.0-b8, 4.0 beta8, v4.0.241, 144445 lines.
* 2022-02-09, Release [v4.0-b7](https://github.com/ossrs/srs/releases/tag/v4.0-b7), v4.0-b7, 4.0 beta7, v4.0.240, 144437 lines.
* 2022-02-04, Release [v4.0-b6](https://github.com/ossrs/srs/releases/tag/v4.0-b6), v4.0-b6, 4.0 beta6, v4.0.238, 144437 lines.
* 2022-01-30, Release [v4.0-b5](https://github.com/ossrs/srs/releases/tag/v4.0-b5), v4.0-b5, 4.0 beta5, v4.0.236, 144416 lines.
* 2022-01-17, Release [v4.0-b4](https://github.com/ossrs/srs/releases/tag/v4.0-b4), v4.0-b4, 4.0 beta4, v4.0.230, 144393 lines.
* 2022-01-13, Release [v4.0-b3](https://github.com/ossrs/srs/releases/tag/v4.0-b3), v4.0-b3, 4.0 beta3, v4.0.229, 144393 lines.
* 2022-01-03, Release [v4.0-b2](https://github.com/ossrs/srs/releases/tag/v4.0-b2), v4.0-b2, 4.0 beta2, v4.0.215, 144278 lines.
* 2021-12-19, Release [v4.0-b1](https://github.com/ossrs/srs/releases/tag/v4.0-b1), v4.0-b1, 4.0 beta1, v4.0.206, 144126 lines.
* 2021-12-01, Release [v4.0-b0](https://github.com/ossrs/srs/releases/tag/v4.0-b0), v4.0-b0, 4.0 beta0, v4.0.201, 144022 lines.
* 2021-11-15, Release [v4.0.198](https://github.com/ossrs/srs/releases/tag/v4.0.198), 4.0 dev8, v4.0.198, 144010 lines.
* 2021-11-02, Release [v4.0.191](https://github.com/ossrs/srs/releases/tag/v4.0.191), 4.0 dev7, v4.0.191, 143890 lines.
* 2021-10-12, Release [v4.0.177](https://github.com/ossrs/srs/releases/tag/v4.0.177), 4.0 dev6, v4.0.177, 143686 lines.
* 2021-09-05, Release [v4.0.161](https://github.com/ossrs/srs/releases/tag/v4.0.161), 4.0 dev5, v4.0.161, 145865 lines.
* 2021-08-15, Release [v4.0.156](https://github.com/ossrs/srs/releases/tag/v4.0.156), 4.0 dev4, v4.0.156, 145490 lines.
* 2021-08-14, Release [v4.0.153](https://github.com/ossrs/srs/releases/tag/v4.0.153), 4.0 dev3, v4.0.153, 145506 lines.
* 2021-08-07, Release [v4.0.150](https://github.com/ossrs/srs/releases/tag/v4.0.150), 4.0 dev2, v4.0.150, 145289 lines.
* 2021-07-25, Release [v4.0.146](https://github.com/ossrs/srs/releases/tag/v4.0.146), 4.0 dev1, v4.0.146, 144026 lines.
* 2021-07-04, Release [v4.0.139](https://github.com/ossrs/srs/releases/tag/v4.0.139), 4.0 dev0, v4.0.139, 143245 lines.
* 2020-06-27, [Release v3.0-r0](https://github.com/ossrs/srs/releases/tag/v3.0-r0), 3.0 release0, 3.0.141, 122674 lines.
* 2020-02-02, [Release v3.0-b0](https://github.com/ossrs/srs/releases/tag/v3.0-b0), 3.0 beta0, 3.0.112, 121709 lines.
* 2019-10-04, [Release v3.0-a0](https://github.com/ossrs/srs/releases/tag/v3.0-a0), 3.0 alpha0, 3.0.56, 107946 lines.
* 2017-03-03, [Release v2.0-r0](https://github.com/ossrs/srs/releases/tag/v2.0-r0), 2.0 release0, 2.0.234, 86373 lines.
* 2016-08-06, [Release v2.0-b0](https://github.com/ossrs/srs/releases/tag/v2.0-b0), 2.0 beta0, 2.0.210, 89704 lines.
* 2015-08-23, [Release v2.0-a0](https://github.com/ossrs/srs/releases/tag/v2.0-a0), 2.0 alpha0, 2.0.185, 89022 lines.
* 2014-12-05, [Release v1.0-r0](https://github.com/ossrs/srs/releases/tag/v1.0-r0), all bug fixed, 1.0.10, 59391 lines.
* 2014-10-09, [Release v0.9.8](https://github.com/ossrs/srs/releases/tag/v0.9.8), all bug fixed, 1.0.0, 59316 lines.
* 2014-04-07, [Release v0.9.1](https://github.com/ossrs/srs/releases/tag/v0.9.1), live streaming. 30000 lines.
* 2013-10-23, [Release v0.1.0](https://github.com/ossrs/srs/releases/tag/v0.1.0), rtmp. 8287 lines.
* 2013-10-17, Created.
## Features
Please read [FEATURES](trunk/doc/Features.md#features).
## Changelog
Please read [CHANGELOG](trunk/doc/CHANGELOG.md#changelog).
## Compare
Comparing with other media servers, SRS is much better and stronger, for details please
read Product([CN](https://github.com/ossrs/srs/wiki/v4_CN_Compare)/[EN](https://github.com/ossrs/srs/wiki/v4_EN_Compare)).
## Performance
Please read [PERFORMANCE](trunk/doc/PERFORMANCE.md#performance).
## Architecture
Please read [ARCHITECTURE](trunk/doc/Architecture.md#architecture).
## Ports
Please read [PORTS](trunk/doc/Resources.md#ports).
## APIs
Please read [APIS](trunk/doc/Resources.md#apis).
## Mirrors
Please read [MIRRORS](trunk/doc/Resources.md#mirrors).
Beijing, 2013.10
Winlin