LibrePlanet:Conference/2016/Streaming

Keynote capture script

#!/bin/bash

xid=$(xwininfo  -root -all|grep "Jitsi Meet" | sed -e 's/^ *//' | cut -d\  -f1)
[ 1${xid}1 != 11 ] && xidparameter="xid=$xid"

export GST_DEBUG=4
DATE=$(date +%Y-%m-%d-%H_%M_%S)
PASSWORD=xxx

# pactl list|grep alsa_output
device1="alsa_output.usb-Burr-Brown_from_TI_USB_Audio_CODEC-00-CODEC.analog-stereo.monitor"
device2="alsa_input.usb-Burr-Brown_from_TI_USB_Audio_CODEC-00-CODEC.analog-stereo"

gst-launch-1.0 --gst-debug-level=$1 --eos-on-shutdown ximagesrc use-damage=false $xidparameter show-pointer=false !\
 videoconvert ! videorate ! video/x-raw,framerate=20/1 ! videoscale ! video/x-raw, width=1024, height=768 !  \
 vp8enc min_quantizer=1 max_quantizer=10 cpu-used=10 deadline=41000 threads=2 ! queue ! mux. \
 pulsesrc device=$device1 ! adder name=mix ! vorbisenc  quality=0.4 ! queue ! mux. \
 pulsesrc device=$device2 ! mix. \
 webmmux streamable=true name=mux ! queue ! tee name=s ! queue ! filesink location=keynote-${DATE}.webm \
 s. ! queue leaky=2 ! shout2send ip=live2.fsf.org port=80 mount=keynote.webm password=$PASSWORD sync=false 2>&1 |\
 tee keynote-${DATE}.log

OpenBroadcaster 2 v4l

This instructions are for building OpenBroadcaster on Debian 8 stable, plus ffmpeg as a dependency.

Building/installing:

Install dependencies:

   # apt-get install build-essential pkg-config cmake git checkinstall libx11-dev libgl1-mesa-dev \
libpulse-dev libxcomposite-dev libxinerama-dev libv4l-dev libudev-dev libfreetype6-dev \
libfontconfig-dev qtbase5-dev libqt5x11extras5-dev libx264-dev libxcb-xinerama0-dev \
libxcb-shm0-dev libjack-jackd2-dev libcurl4-openssl-dev zlib1g-dev yasm gstreamer-tools

Download and build ffmpeg:

   $ git clone --depth 1 git://source.ffmpeg.org/ffmpeg.git
   $ cd ffmpeg
   $ ./configure --enable-shared --prefix=/usr
   $ make -j4
   
   # checkinstall --pkgname=FFmpeg --fstrans=no --backup=no \
       --pkgversion="$(date +%Y%m%d)-git" --deldoc=yes

Download and build obs:

   $ git clone https://github.com/jp9000/obs-studio.git
   $ cd obs-studio
   $ mkdir build && cd build
   $ cmake -DUNIX_STRUCTURE=1 -DCMAKE_INSTALL_PREFIX=/usr ..
   $ make -j4
   # checkinstall --pkgname=obs-studio --fstrans=no --backup=no \
      --pkgversion="$(date +%Y%m%d)-git" --deldoc=yes

Install v4l loop:

   # apt-get install v4l2loopback-dkms
   # echo v4l2loopback >> /etc/modules
   # modprobe v4l2loopback

Install local stream manager:

   # apt-get install crtmpserver

Setup

Run obs, set streaming settings to: URL: rtmp://127.0.0.1/flvplayback Stream Key: stream

Test v4l device:

    gst-launch-1.0 v4l2src device=/dev/video1 ! xvimagesink