LibrePlanet: Conference/2019/Streaming

This year, we used HUBAngl to stream speakers and audio. We also used a gstreamer script to stream desktop streams.

#!/bin/bash

export DISPLAY=":0"

while true; do

  unset XPARAMETERS

  # native x200 resolution not supported

  # mirrored mode
  if xdpyinfo|grep -i dimensions |grep 1280x720 -q; then
      XPARAMETERS="startx=0 starty=0 endx=1279 endy=719"
  fi
  # dual mode
  if xdpyinfo|grep -i dimensions |grep 2560x720 -q; then
      XPARAMETERS="startx=1280 starty=0 endx=2559 endy=719"
  fi

  sleep 1
  gst-launch-1.0 -e ximagesrc $XPARAMETERS use-damage=false show-pointer=false ! videoconvert !  videorate ! video/x-raw,framerate=$FRAMERATE/1 ! videoscale ! video/x-raw, width=1280, height=720 ! queue ! vp8enc target_bitrate=$BITRATE cpu-used=16 deadline=1 threads=2 keyframe-max-dist=$(expr $FRAMERATE \* 2) ! webmmux streamable=true ! shout2send ip=live-master.fsf.org port=80 mount=$MOUNT password=$PASSWORD sync=false
done

We also used desktop shortcuts that ran the following scripts to change video resolution, and to set mirror / dual monitor modes:

#!/bin/bash

export DISPLAY=":0.0"

if (xrandr | grep -q "VGA1 disconnected" ); then
  echo "$0: error: failed to detect 2nd monitor in xrandr output. Doing nothing."
  exit 1
fi

if  ! ( xrandr | grep -q _LP); then
    xrandr --newmode "1280x720_60.00_LP"   74.50  1280 1344 1472 1664  720 723 728 748 -hsync +vsync
    xrandr --addmode LVDS1 "1280x720_60.00_LP"
    xrandr --addmode VGA1 "1280x720_60.00_LP"
fi

if ( [ "1${1}1" = "1dual1" ]); then
    xrandr --output LVDS1 --mode 1280x720_60.00_LP --output VGA1 --mode 1280x720_60.00_LP --right-of LVDS1
else
    xrandr --output LVDS1 --mode 1280x720_60.00_LP --output VGA1 --same-as LVDS1
fi

echo Changed the screen settings, now restarting gstreamer
pkill gst-launch-1.0