75 lines
2.2 KiB
Markdown
75 lines
2.2 KiB
Markdown
# SRS-SIP
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## Usage
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Pre-requisites:
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- Go 1.20+ is installed
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- GOPATH/bin is in your PATH
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Then run
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```
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git clone https://github.com/ossrs/srs-sip
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cd srs-sip
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./bootstrap.sh
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mage
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```
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If you are on a Unix-like system, you can also run the following command.
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```
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make
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```
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Run the program:
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```
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./bin/srs-sip -sip-port 5060 -media-addr 127.0.0.1:1985 -api-port 2020 -http-server-port 8888
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```
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- `sip-port` : the SIP port, this program listen on, for device register with gb28181
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- `media-addr` : the API address for SRS, typically on port 1985, used to send HTTP requests to "/gb/v1/publish"
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- `api-port`: The API server port, used to send HTTP requests, for example "/srs-sip/v1/channels"
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- `http-server-port`: The demo web server.
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Access http://localhost:8888 in web browser.
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## Sequence
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1. 注册流程
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```mermaid
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sequenceDiagram
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Device ->> SRS-SIP : 1. Register
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SRS-SIP ->> Device : 2. 200 OK
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```
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暂时没有实现鉴权功能，敬请期待。
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2. 播放视频流程
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Player、SRS-SIP、SRS Server和GB28181 Device的交互图如下：
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```mermaid
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sequenceDiagram
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Player ->> SRS-SIP : 1. Play Request(with id)
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SRS-SIP ->> SRS : 2. Publish Request(with ssrc and id)
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SRS ->> SRS-SIP : 3. Response(with port)
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SRS-SIP ->> Device : 4. Invite(with port)
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Device ->> SRS-SIP : 5. 200 OK
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SRS-SIP ->> Player : 6. 200 OK(with url)
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Device -->> SRS : Media Stream
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Player ->> SRS : 7. Play
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SRS -->> Player : Media Stream
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Player ->> SRS-SIP : 8. Stop Request
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SRS-SIP ->> SRS : 9. Unpublish Request
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SRS-SIP ->> Device : 10. Bye
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```
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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
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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
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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
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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
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5. 设备响应成功
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6. SRS-SIP响应成功，携带URL，用于播放
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7. Player通过返回的URL进行拉流播放
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8. Player停止播放
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9. SRS-SIP通知SRS停止收流
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10. SRS-SIP通过设备停止推流
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