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# Ghostream
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[](LICENSE)
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[](https://pkg.go.dev/mod/gitlab.crans.org/nounous/ghostream)
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[](https://goreportcard.com/report/gitlab.crans.org/nounous/ghostream)
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[](https://gitlab.crans.org/nounous/ghostream/commits/master)
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[](https://gitlab.crans.org/nounous/ghostream/-/commits/master)
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*Boooo!* A simple streaming server with authentication and open-source technologies.
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This project was developped at [Cr@ns ](https://crans.org/ ) to stream events.
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Features:
- WebRTC playback with a lightweight web interface.
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- SRT stream input, supported by FFMpeg, OBS and Gstreamer.
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- Low-latency streaming, sub-second with web player.
- Authentification of incoming stream using LDAP server.
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- Possibility to forward stream to other streaming servers.
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## Installation on Debian/Ubuntu
You need at least libsrt 1.4.1. On Ubuntu 20.04 or Debian Buster, you may manually install [libsrt1-openssl ](http://ftp.fr.debian.org/debian/pool/main/s/srt/libsrt1-openssl_1.4.1-5+b1_amd64.deb ) then [libsrt-openssl-dev ](http://ftp.fr.debian.org/debian/pool/main/s/srt/libsrt-openssl-dev_1.4.1-5+b1_amd64.deb ).
You may clone this repository, then `go run main.go` for debugging, or `go get gitlab.crans.org/nounous/ghostream` .
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## Installation with Docker
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An example is given in [docs/docker-compose.yml ](docs/docker-compose.yml ).
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It uses Traefik reverse proxy.
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You can also launch the Docker image using,
```
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docker build . -t ghostream
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docker run -it --rm -p 2112:2112 -p 9710:9710/udp -p 8080:8080 -p 10000-10005:10000-10005/udp ghostream
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```
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## Streaming
As stated by OBS wiki, when streaming you should adapt the latency to `2.5 * (the round-trip time with server, in μs)` .
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### With OBS
As OBS uses FFMpeg, you need to have FFMpeg compiled with SRT support. To check if SR is available, run `ffmpeg -protocols | grep srt` .
On Windows and MacOS, OBS comes with his own FFMpeg that will work.
In OBS, go to "Settings" -> "Stream" and change "Service" to "Custom..." and "Server" to `srt://127.0.0.1:9710` .
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### With GStreamer
To stream X11 screen,
```bash
gst-launch-1.0 ximagesrc startx=0 show-pointer=true use-damage=0 \
! videoconvert \
! x264enc bitrate=32000 tune=zerolatency speed-preset=veryfast byte-stream=true threads=1 key-int-max=15 intra-refresh=true ! video/x-h264, profile=baseline, framerate=30/1 \
! mpegtsmux \
! srtserversink uri=srt://127.0.0.1:9710/ latency=1000000
```
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## References
- Phil Cluff (2019), *[Streaming video on the internet without MPEG.](https://mux.com/blog/streaming-video-on-the-internet-without-mpeg/)*
- MDN web docs, *[Signaling and video calling.](https://developer.mozilla.org/en-US/docs/Web/API/WebRTC_API/Signaling_and_video_calling)*
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- [WebRTC For The Curious ](https://webrtcforthecurious.com/ )
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- OBS Wiki, *[Streaming With SRT Protocol.](https://obsproject.com/wiki/Streaming-With-SRT-Protocol)*
