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README.md

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v4l2rtspserver

This is an streamer feed from :

  • an Video4Linux device that support H264, HEVC, JPEG, VP8 or VP9 capture.
  • an ALSA device that support PCM S16_BE, S16_LE, S32_BE or S32_LE

The RTSP server support :

  • RTP/UDP unicast
  • RTP/UDP multicast
  • RTP/TCP
  • RTP/RTSP/HTTP

The HTTP server support (available using -S option for capture format that could be muxed in Transport Stream):

  • HLS
  • MPEG-DASH

Dependencies

  • liblivemedia-dev License LGPL > live.2012.01.07 (need StreamReplicator)
  • libv4l2cpp Unlicense
  • liblog4cpp5-dev License LGPL (optional) If liblog4cpp5-dev is not present, a simple log using std::cout is used.
  • libasound2-dev Licence LGPL (optional) If libasound2-dev is not present in the build environment, there will have no audio support.

Usage

./v4l2rtspserver [-v[v]] [-Q queueSize] [-O file] \
		       [-I interface] [-P RTSP port] [-p RTSP/HTTP port] [-m multicast url] [-u unicast url] [-M multicast addr] [-c] [-t timeout] \
		       [-r] [-s] [-W width] [-H height] [-F fps] [device1] [device2]
	 -v       : verbose
	 -vv      : very verbose
	 -Q length: Number of frame queue  (default 10)
	 -O output: Copy captured frame to a file or a V4L2 device
	 
	 RTSP options :
	 -I addr  : RTSP interface (default autodetect)
	 -P port  : RTSP port (default 8554)
	 -p port  : RTSP over HTTP port (default 0)
	 -U user:password : RTSP user and password
	 -R realm  : use md5 password 'md5(<username>:<realm>:<password>')
	 -u url   : unicast url (default unicast)
	 -m url   : multicast url (default multicast)
	 -M addr  : multicast group:port (default is random_address:20000)
	 -c       : don't repeat config (default repeat config before IDR frame)
	 -t secs  : RTCP expiration timeout (default 65)
	 -S[secs] : HTTP segment duration (enable HLS & MPEG-DASH)
	 
	 V4L2 options :
	 -r       : V4L2 capture using read interface (default use memory mapped buffers)
	 -w       : V4L2 capture using write interface (default use memory mapped buffers)
	 -B       : V4L2 capture using blocking mode (default use non-blocking mode)
	 -s       : V4L2 capture using live555 mainloop (default use a separated reading thread)
	 -f       : V4L2 capture using current capture format (-W,-H are ignored)
	 -fformat : V4L2 capture using format (-W,-H are used)
	 -W width : V4L2 capture width (default 640)
	 -H height: V4L2 capture height (default 480)
	 -F fps   : V4L2 capture framerate (default 25, 0 disable setting framerate)
	 -G <w>x<h>[x<f>] : V4L2 capture format (default 0x0x25)
	 
	 ALSA options :
	 -A freq    : ALSA capture frequency and channel (default 44100)
	 -C channels: ALSA capture channels (default 2)
	 -a fmt     : ALSA capture audio format (default S16_LE)
	 
	 device   : V4L2 capture device and/or ALSA device (default /dev/video0)

When audio support is not present, ALSA options are not printed running with -h argument.

Authentification is enable when almost one user is defined. You can configure credentials :

  • using plain text password:

    -U foo:bar -U admin:admin
  • using md5 password:

    -R myrealm -U foo:$(echo -n foo:myrealm:bar | md5sum | cut -d- -f1) -U admin:$(echo -n admin:myrealm:admin | md5sum | cut -d- -f1)

It is possible to compose the RTSP session is different ways :

  • v4l2rtspserver /dev/video0 : one RTSP session with RTP video capturing V4L2 device /dev/video0
  • v4l2rtspserver ,default : one RTSP session with RTP audio capturing ALSA device default
  • v4l2rtspserver /dev/video0,default : one RTSP session with RTP audio and RTP video
  • v4l2rtspserver /dev/video0 ,default : two RTSP sessions first one with RTP video and second one with RTP audio
  • v4l2rtspserver /dev/video0 /dev/video1 : two RTSP sessions with an RTP video
  • v4l2rtspserver /dev/video0,/dev/video0 : one RTSP session with RTP audio and RTP video (ALSA device associatd with the V4L2 device)

Build

  • Build

      cmake . && make

    If live555 is not installed it will download it from live555.com and compile it. If asound is not installed, ALSA will be disabled.
    If it still not work you will need to read Makefile.

  • Install (optional)

      sudo make install
  • Packaging (optional)

      cpack .

Using Raspberry Pi Camera

This RTSP server works with Raspberry Pi camera using :

  • the opensource V4L2 driver bcm2835-v4l2

    sudo modprobe -v bcm2835-v4l2

  • the closed source V4L2 driver for the Raspberry Pi Camera Module http://www.linux-projects.org/uv4l/

    sudo uv4l --driver raspicam --auto-video_nr --encoding h264

Using v4l2loopback

For camera providing uncompress format v4l2tools can compress the video to an intermediate virtual V4L2 device v4l2loopback:

/dev/video0 (camera device)-> v4l2compress_h264 -> /dev/video10 (v4l2loopback device) -> v4l2rtspserver

This workflow could be set using :

modprobe v4l2loopback video_nr=10
v4l2compress -fH264 /dev/video0 /dev/video10 &
v4l2rtspserver /dev/video10 &

Playing HTTP streams

When v4l2rtspserver is started with '-S' arguments it also give access to streams through HTTP.
These streams could be played :

* for MPEG-DASH with :   
       MP4Client http://..../unicast.mpd   
   
* for HLS with :  
       vlc http://..../unicast.m3u8  
       gstreamer-launch-1.0 playbin uri=http://.../unicast.m3u8  

It is now possible to play HLS url directly from browser :

There is also a small HTML page that use hls.js and dash.js, but dash still not work because player doesnot support MP2T format.

Using Docker image

You can start the application using the docker image :

    docker run -p 8554:8554 -it mpromonet/v4l2rtspserver

You can expose V4L2 devices from your host using :

    docker run --device=/dev/video0 -p 8554:8554 -it mpromonet/v4l2rtspserver

The container entry point is the v4l2rtspserver application, then you can :

  • get the help using :

      docker run -it mpromonet/v4l2rtspserver -h
  • run the container specifying some paramters :

      docker run --device=/dev/video0 -p 8554:8554 -it mpromonet/v4l2rtspserver -u "" -H640 -W480 

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