141 lines
3.2 KiB
Bash
Executable file
141 lines
3.2 KiB
Bash
Executable file
#!/usr/bin/env bash
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set -o errexit
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set -o pipefail
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set -o nounset
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# Variables
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FPS=15
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DEVICE_NUMBER=50
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MONITOR_NUMBER=
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FFMPEG_OPTIONS=
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BORDER=false
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# Options
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while [ ! $# -eq 0 ]
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do
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case "$1" in
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-h | --help)
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echo "$0 - Monitor to Camera"
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echo ""
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echo "$0 [options] [value]"
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echo ""
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echo "options:"
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echo "-h, --help show help"
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echo "-f, --framerate=FPS set framerate"
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echo "-d, --device-number=NUM set device number"
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echo "-m, --monitor-number=NUM set monitor number"
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echo "-r, --resolution H:W manually set output resolution"
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echo "-vf, --vertical-flip vertically flip the monitor capture"
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echo "-hf, --horizontal-flip horizontally flip the monitor capture"
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echo "-b, --border add border when scaling to avoid stretching"
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exit
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;;
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-f | --framerate)
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FPS=$2
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;;
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-d | --device-number)
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DEVICE_NUMBER=$2
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;;
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c | center)
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MONITOR_NUMBER=0
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;;
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l | left)
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MONITOR_NUMBER=1
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;;
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r | right)
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MONITOR_NUMBER=2
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;;
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s | stop)
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eval "pkill ffmpeg"
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exit 0
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;;
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-m | --monitor-number)
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MONITOR_NUMBER=$2
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;;
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-r | --resolution)
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FFMPEG_OPTIONS+="-vf scale=$2"
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;;
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-vf | --vertical-flip)
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FFMPEG_OPTIONS+="-vf vflip"
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;;
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-hf | --horizontal-flip)
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FFMPEG_OPTIONS+="-vf hflip"
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;;
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-b | --border)
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BORDER=true
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;;
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esac
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shift
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done
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# Dependency checking
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XRANDR=$(command -v xrandr)
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if ! [ -x "$XRANDR" ]
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then
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echo "Error: xrandr is not installed."
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exit 1
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fi
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FFMPEG=$(command -v ffmpeg)
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if ! [ -x "$FFMPEG" ]
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then
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echo "Error: ffmpeg is not installed."
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exit 1
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fi
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# Reload v4l2loopback if device doesn't exist
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#if ! [ -f /dev/video"$DEVICE_NUMBER" ]
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#then
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# # Unload v4l2loopback module
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# if ! $(sudo modprobe -r v4l2loopback &> /dev/null)
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# then
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# echo "Unable to unload v4l2loopback, Close any programs using virtual video devices and try again"
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# exit 1
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# fi
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# Load v4lwloopback module
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# sudo modprobe v4l2loopback video_nr="$DEVICE_NUMBER" 'card_label=Mon2Cam'
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#fi
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# Option checking
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if [ "$BORDER" = true ]
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then
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if [ -z "$RESOLUTION" ]
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then
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echo "You didn't specify a resolution (-r 1920:1080)"
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exit 1
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fi
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RES_WIDTH=$(echo "${RESOLUTION}" | cut -f2 -d'=' | cut -f1 -d':');
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RES_HEIGHT=$(echo "${RESOLUTION}" | cut -f2 -d':');
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RESOLUTION="${RESOLUTION}:force_original_aspect_ratio=decrease,pad=$RES_WIDTH:$RES_HEIGHT:x=($RES_WIDTH-iw)/2:y=($RES_HEIGHT-ih)/2"
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fi
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# Pick monitor
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if [ -z "$MONITOR_NUMBER" ]
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then
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$XRANDR --listactivemonitors
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read -r -p "Which monitor: " MONITOR_NUMBER
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fi
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# Monitor information
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MONITOR_INFO=$(xrandr --listactivemonitors | grep "$MONITOR_NUMBER:" | cut -f4 -d' ')
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MONITOR_HEIGHT=$(echo "$MONITOR_INFO" | cut -f2 -d'/' | cut -f2 -d'x')
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MONITOR_WIDTH=$(echo "$MONITOR_INFO" | cut -f1 -d'/')
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MONITOR_X=$(echo "$MONITOR_INFO" | cut -f2 -d'+')
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MONITOR_Y=$(echo "$MONITOR_INFO" | cut -f3 -d'+')
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# Use x11grab to stream screen into v4l2loopback device
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echo "CTRL + C to stop"
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echo "Your screen will look mirrored for you, not others"
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$FFMPEG \
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-f x11grab \
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-r "$FPS" \
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-s "$MONITOR_WIDTH"x"$MONITOR_HEIGHT" \
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-i "$DISPLAY"+"$MONITOR_X","$MONITOR_Y" \
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$FFMPEG_OPTIONS \
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-pix_fmt yuv420p \
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-f v4l2 \
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-s 1920x1080 \
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/dev/video"$DEVICE_NUMBER" &> /dev/null
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