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@hickscorp

hickscorp/ffcast

Forked from jeanparpaillon/ffcast
Created September 24, 2018 15:59
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Revisions

  1. hickscorp revised this gist Sep 24, 2018. 1 changed file with 30 additions and 20 deletions.
    50 changes: 30 additions & 20 deletions ffcast
    View file
    Original file line number Diff line number Diff line change
    @@ -1,27 +1,37 @@
    #!/bin/bash

    function at_exit {
    sudo rmmod v4l2loopback 2> /dev/null
    }
    if [[ $EUID -ne 0 ]]; then
    exec sudo $0 $*
    exit 0
    fi

    function usage {
    echo "Usage: $0 [<screen>]"
    function at_exit {
    echo "Removing capture module..."
    rmmod v4l2loopback 2> /dev/null
    }

    trap at_exit EXIT

    video_nr=$(( $(ls /dev/video* | sort -nr | head -n1 | sed -e 's#/dev/video##') + 1 ))

    sudo modprobe v4l2loopback video_nr=$video_nr 'card_label=screenShare' exclusive_caps=1

    SCREEN=${1:-0}

    monitor=$(xrandr --listmonitors | awk -e '/^\s+'$SCREEN':/ { print $3 }')
    screen_w=$(echo $monitor | awk -Fx '{ print $1 }' | awk -F/ '{ print $1 }')
    screen_h=$(echo $monitor | awk -Fx '{ print $2 }' | awk -F/ '{ print $1 }')
    screen_x=$(echo $monitor | awk -F+ '{ print $2 }')
    screen_y=$(echo $monitor | awk -F+ '{ print $3 }')

    ffmpeg -loglevel error -f x11grab -r 20 -s ${screen_w}x${screen_h} -i :0.0+${screen_x},${screen_y} -vcodec rawvideo -pix_fmt yuv420p -threads 0 -f v4l2 /dev/video${video_nr}

    exit 0
    MONITOR=$(xrandr --listmonitors | awk -e '/^\s+'$SCREEN':/ { print $3 }')
    VIDEO_NR=$(( $(find /dev -name 'video*' | sort -nr | head -n1 | sed -e 's#/dev/video##') + 1 ))
    DEVICE="/dev/video$VIDEO_NR"

    echo "Loading module v4l2loopback over video $DEVICE..."
    modprobe v4l2loopback video_nr=$VIDEO_NR 'card_label=screenCap' exclusive_caps=1

    echo "Calculating capture geometry for monitor $MONITOR"
    X=$(echo $MONITOR | awk -F+ '{ print $2 }')
    Y=$(echo $MONITOR | awk -F+ '{ print $3 }')
    WIDTH=$(echo $MONITOR | awk -Fx '{ print $1 }' | awk -F/ '{ print $1 }')
    HEIGHT=$(echo $MONITOR | awk -Fx '{ print $2 }' | awk -F/ '{ print $1 }')

    echo "Starting capture with geometry ${WIDTH}x${HEIGHT}@${X},${Y} to device $DEVICE..."
    ffmpeg -loglevel error \
    -f x11grab \
    -r 30 \
    -s ${WIDTH}x${HEIGHT} \
    -i :0.0+${X},${Y} \
    -vcodec rawvideo \
    -pix_fmt yuv420p \
    -threads 0 \
    -f v4l2 $DEVICE
  2. Jean Parpaillon revised this gist Aug 3, 2018. 1 changed file with 10 additions and 5 deletions.
    15 changes: 10 additions & 5 deletions ffcast
    View file
    Original file line number Diff line number Diff line change
    @@ -1,14 +1,11 @@
    #!/bin/bash

    SCREEN_W=1920
    SCREEN_H=1080

    function at_exit {
    sudo rmmod v4l2loopback 2> /dev/null
    }

    function usage {
    echo "Usage: $0"
    echo "Usage: $0 [<screen>]"
    }

    trap at_exit EXIT
    @@ -17,6 +14,14 @@ video_nr=$(( $(ls /dev/video* | sort -nr | head -n1 | sed -e 's#/dev/video##') +

    sudo modprobe v4l2loopback video_nr=$video_nr 'card_label=screenShare' exclusive_caps=1

    ffmpeg -loglevel error -f x11grab -r 20 -s ${SCREEN_W}x${SCREEN_H} -i :0.0+0,0 -vcodec rawvideo -pix_fmt yuv420p -threads 0 -f v4l2 /dev/video${video_nr}
    SCREEN=${1:-0}

    monitor=$(xrandr --listmonitors | awk -e '/^\s+'$SCREEN':/ { print $3 }')
    screen_w=$(echo $monitor | awk -Fx '{ print $1 }' | awk -F/ '{ print $1 }')
    screen_h=$(echo $monitor | awk -Fx '{ print $2 }' | awk -F/ '{ print $1 }')
    screen_x=$(echo $monitor | awk -F+ '{ print $2 }')
    screen_y=$(echo $monitor | awk -F+ '{ print $3 }')

    ffmpeg -loglevel error -f x11grab -r 20 -s ${screen_w}x${screen_h} -i :0.0+${screen_x},${screen_y} -vcodec rawvideo -pix_fmt yuv420p -threads 0 -f v4l2 /dev/video${video_nr}

    exit 0
  3. Jean Parpaillon created this gist Aug 3, 2018.
    22 changes: 22 additions & 0 deletions ffcast
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,22 @@
    #!/bin/bash

    SCREEN_W=1920
    SCREEN_H=1080

    function at_exit {
    sudo rmmod v4l2loopback 2> /dev/null
    }

    function usage {
    echo "Usage: $0"
    }

    trap at_exit EXIT

    video_nr=$(( $(ls /dev/video* | sort -nr | head -n1 | sed -e 's#/dev/video##') + 1 ))

    sudo modprobe v4l2loopback video_nr=$video_nr 'card_label=screenShare' exclusive_caps=1

    ffmpeg -loglevel error -f x11grab -r 20 -s ${SCREEN_W}x${SCREEN_H} -i :0.0+0,0 -vcodec rawvideo -pix_fmt yuv420p -threads 0 -f v4l2 /dev/video${video_nr}

    exit 0