SRS/4.0，Leo，是一个简单高效的实时视频服务器，支持RTMP/WebRTC/HLS/HTTP-FLV/SRT。

SRS is a simple, high efficiency and realtime video server, supports RTMP/WebRTC/HLS/HTTP-FLV/SRT.

SRS is licenced under MIT, but some depended libraries are distributed using their own licenses.

Build SRS from source, please read Wiki: Gettting Started( EN / CN ):

git clone -b 4.0release https://gitee.com/ossrs/srs.git &&
cd srs/trunk && ./configure && make && ./objs/srs -c conf/srs.conf

Open http://localhost:8080/ to check it, then publish by FFmpeg or OBS as:

ffmpeg -re -i ./doc/source.flv -c copy -f flv -y rtmp://localhost/live/livestream

Note: It's also able to publish by H5 if WebRTC is enabled.

Play the following streams by players:

• RTMP (by VLC): rtmp://localhost/live/livestream
• H5(HTTP-FLV): http://localhost:8080/live/livestream.flv
• H5(HLS): http://localhost:8080/live/livestream.m3u8
• H5(WebRTC): webrtc://localhost/live/livestream

From here, please read wikis:

• Getting Started, please read Wiki first.
• 中文文档：起步，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, EN)
• How to deliver RTMP streaming?(CN, EN)
• How to build RTMP Edge-Cluster?(CN, EN)
• How to build RTMP Origin-Cluster?(CN, EN)
• How to deliver HTTP-FLV streaming?(CN, EN)
• How to deliver HLS streaming?(CN, EN)
• How to deliver low-latency streaming?(CN, EN)
• How to use WebRTC? (CN, EN)

Other important wiki:

• Usage: How to delivery DASH(Experimental)?(CN, EN)
• Usage: How to transode RTMP stream by FFMPEG?(CN, EN)
• Usage: How to delivery HTTP FLV Live Streaming Cluster?(CN, EN)
• Usage: How to ingest file/stream/device to RTMP?(CN, EN)
• Usage: How to forward stream to other servers?(CN, EN)
• Usage: How to improve edge performance for multiple CPUs? (CN, EN)
• Usage: How to file a bug or contact us? (CN, EN)

There are two types of people that have contributed to the SRS project:

• Maintainers: Contribute and maintain important features. SRS always remembers and thanks you by writing your names in stream metadata.
• Contributors: Submit patches, report bugs, add translations, help answer newbie questions, and generally make SRS much better.

Maintainers of SRS project:

• Winlin: Focus on issues/PR and tests now.
• ZhaoWenjie: Focus on HDS module.
• ShiWei: Focus on SRT module.
• XiaoZhihong: Focus on WebRTC module.
• WuPengqiang: Focus on WebRTC module.
• XiaLixin: Focus on GB28181 module.
• LiPeng: Focus on WebRTC module.
• ChenGuanghua: Focus on WebRTC module.
• ChenHaibo: Focus on GB28181 and API module.

A big THANK YOU goes to:

• All friends of SRS for big supports.
• Genes amd Mabbott for creating st(state-threads).
• Michael Talyanksy for introducing ST to us.

• 2021-09-05, Release v4.0.161, 4.0 dev5, v4.0.161, 145865 lines.
• 2021-08-15, Release v4.0.156, 4.0 dev4, v4.0.156, 145490 lines.
• 2021-08-14, Release v4.0.153, 4.0 dev3, v4.0.153, 145506 lines.
• 2021-08-07, Release v4.0.150, 4.0 dev2, v4.0.150, 145289 lines.
• 2021-07-25, Release v4.0.146, 4.0 dev1, v4.0.146, 144026 lines.
• 2021-07-04, Release v4.0.139, 4.0 dev0, v4.0.139, 143245 lines.
• 2020-06-27, Release v3.0-r0, 3.0 release0, 3.0.141, 122674 lines.
• 2020-02-02, Release v3.0-b0, 3.0 beta0, 3.0.112, 121709 lines.
• 2019-10-04, Release v3.0-a0, 3.0 alpha0, 3.0.56, 107946 lines.
• 2017-03-03, Release v2.0-r0, 2.0 release0, 2.0.234, 86373 lines.
• 2016-08-06, Release v2.0-b0, 2.0 beta0, 2.0.210, 89704 lines.
• 2015-08-23, Release v2.0-a0, 2.0 alpha0, 2.0.185, 89022 lines.
• 2014-12-05, Release v1.0-r0, all bug fixed, 1.0.10, 59391 lines.
• 2014-10-09, Release v0.9.8, all bug fixed, 1.0.0, 59316 lines.
• 2014-04-07, Release v0.9.1, live streaming. 30000 lines.
• 2013-10-23, Release v0.1.0, rtmp. 8287 lines.
• 2013-10-17, Created.

Please read FEATURES.

Please read CHANGELOG.

Comparing with other media servers, SRS is much better and stronger, for details please read Product(CN/EN).

Please read PERFORMANCE.

Please read ARCHITECTURE.

Please read PORTS.

Please read APIS.

Please read MIRRORS.

Beijing, 2013.10
Winlin