mapengfei53 / srt-live-server

srt live server for low latency

Introduction

srt-live-server(SLS) is an open source live streaming server for low latency based on Secure Reliable Tranport(SRT). Normally, the latency of transport by SLS is less than 1 second in internet.

Requirements

please install the SRT first, refer to SRT(https://github.com/Haivision/srt) for system enviroment. SLS can only run on OS based on linux, such as mac, centos or ubuntu etc.

Complie

$ sudo make

bin file is generated in subdir of 'bin'.

Usage

$ cd bin

1.help information $ ./sls -h

2.run with default config file $ ./sls -c ../sls.conf

Test

SLS only supports the MPEG-TS format streaming. you can push camera live stream by FFMPEG.Please download ffmpeg sourcecode from https://github.com/FFmpeg/FFmpeg, then compile FFMPEG with --enable-libsrt.

if "ERROR: srt >= 1.3.0 not found using pkg-config" occured when compiling FFMPEG, please check the ffbuild/config.log file and follow its instruction to resolve this issue.

1.use ffmpeg to push camera stream with SRT(on my mac): $ ./ffmpeg -f avfoundation -framerate 30 -i "0:0" -vcodec libx264 -preset ultrafast -tune zerolatency -flags2 local_header -acodec libmp3lame -g 30 -pkt_size 1316 -flush_packets 0 -f mpegts "srt://[your.sls.ip]:8080?streamid=uplive.sls.com/uplive/test"

2.play the SRT stream with ffplay: ./ffplay -fflag nobuffer -i "srt://[your.sls.ip]:8080?streamid=live.sls.com/live/test"

Note:

1.SLS refer to the RTMP url format(domain/app/stream_name), example: www.sls.com/live/test. The url of SLS must be set in streamid parameter of SRT, which will be the unique identification a stream.

2.How to distinguish the publisher and player of the same stream? In conf file, you can set parameters of domain_player/domain_publisher and app_player/app_publisher to resolve it. Importantly, the two combination strings of domain_publisher/app_publisher and domain_player/app_player must not be equal in the same server block.

3.I supply a simple android app for test sls, your can download from https://github.com/Edward-Wu/liteplayer-srt

ReleaseNote

v1.2

1. update the memory mode, in v1.1 which is publisher copy data to eacc player, in v1.2 each publisher put data to a array and all players read data from this array.
2. update the relation of the publisher and player, the player is not a member of publisher. the only relation of them is array data.
3. add push and pull features, support all and hash mode for push, support loop and hash for pull. in cluster mode, you can push a stream to a hash node, and pull this stream from the same hash node.

v1.2.1

1. support hostname:port/app in upstreams of pull and push.