SRS-SIP

Sequence

sequenceDiagram
    Player ->> SRS-SIP : 1. Play Request(with id)
    SRS-SIP ->>  SRS : 2. Publish Request(with ssrc and id)
    SRS ->> SRS-SIP : 3. Response(with port)
    SRS-SIP ->>  Device : 4. Invite(with port)
    Device ->> SRS-SIP : 5. 200 OK
    SRS-SIP ->> Player : 6. 200 OK(with url)
    Device -->> SRS : Media Stream
    Player ->> SRS : 7. Play
    SRS -->> Player : Media Stream
    Player ->> SRS-SIP : 8. Stop Request
    SRS-SIP ->> SRS : 9. Unpublish Request
    SRS-SIP ->> Device : 10. Bye

Loading

1. 通过SRS-SIP提供的API接口/srs-sip/v1/invite，Player主动发起播放请求，携带设备的通道ID
2. SRS-SIP向SRS发起推流请求，携带SSRC和ID，SSRC是设备推流时RTP里的字段
3. SRS响应推流请求，并返回收流端口。目前SRS仅支持TCP单端口模式，在配置文件stream_caster.listen中配置
4. SRS-SIP通过GB28181协议向设备发起Invite请求，携带SRS的收流端口及SSRC
5. 设备响应成功
6. SRS-SIP响应成功，携带URL，用于播放
7. Player通过返回的URL进行拉流播放
8. Player停止播放
9. SRS-SIP通知SRS停止收流
10. SRS-SIP通过设备停止推流

Building from source

Pre-requisites:

• Go 1.17+ is installed
• GOPATH/bin is in your PATH

Then run

git clone https://github.com/ossrs/srs-sip
cd srs-sip
./bootstrap.sh
mage

If you are on a Unix-like system, you can also run the following command.

make

Run

srs-sip -sip-port 5060 -media-addr 127.0.0.1:1985

• sip-port : the SIP port, this program listen on, for device register with gb28181
• media-addr : the API address for SRS, typically on port 1985, used to send HTTP requests to "gb/v1/publish"