From d74a5a26385ebb21903da26e3d239a4929c4a5b7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Yaroslav=20de=20la=20Pe=C3=B1a=20Smirnov?=
<yps@yaroslavps.com>
Date: Fri, 11 Dec 2020 18:52:10 +0300
Subject: Screen share hack
Hack to be able to share the screen under certain apps such as Zoom* by
using v4l2loopback to create a fake webcam device to which wf-recorder
outputs the contents of the screen.
*Unfortunately because of the corona shit show my university requires to
use this Chinese piece of crap spyware. This Covid nonsense seriously
needs to end.
---
dotfiles/.local/bin/camtoggle | 4 +++-
dotfiles/.local/bin/swayrecord | 25 ++++++++++++++++++++++++-
2 files changed, 27 insertions(+), 2 deletions(-)
(limited to 'dotfiles')
diff --git a/dotfiles/.local/bin/camtoggle b/dotfiles/.local/bin/camtoggle
index 00fd201..a12fcb8 100755
--- a/dotfiles/.local/bin/camtoggle
+++ b/dotfiles/.local/bin/camtoggle
@@ -4,12 +4,14 @@
# If a second camera is present, use the second one
camera="/dev/video0"
[ -e /dev/video2 ] && camera="/dev/video2"
+[ -n "$1" ] && camera="$1"
pkill -f /dev/video || mpv \
--gpu-context=wayland \
+ --profile=low-latency \
--no-osc \
--no-input-default-bindings \
--input-conf=/dev/null \
--geometry=-0-0 \
--autofit=25% \
- --title="mpvfloat" "$camera"
+ --title="mpvfloat" "av://v4l2:$camera"
diff --git a/dotfiles/.local/bin/swayrecord b/dotfiles/.local/bin/swayrecord
index 5c1c2a6..23171e2 100755
--- a/dotfiles/.local/bin/swayrecord
+++ b/dotfiles/.local/bin/swayrecord
@@ -44,11 +44,18 @@ finishscreencast () {
"Screencast recording stopped and saved at "$VREC_DIR/screencast-$OUTPUT.mp4""
}
+finishscreenshare() {
+ kill -2 "$VIDEO_PID"
+ notify-send "📺 Recording" \
+ "Screen sharing stopped."
+}
+
finishrecording () {
case "$TYPE" in
video) finishvideo;;
audio) finishaudio;;
screencast) finishscreencast;;
+ screenshare) finishscreenshare;;
esac
rm -f ~/.cache/recordingpid
rm -f ~/.cache/recordingicon
@@ -71,6 +78,20 @@ video () {
wait
}
+screenshare () {
+ # Hack to share screen in certain apps under wayland wlroots-based compositors
+ loopbackcam="$(v4l2-ctl --list-devices | \
+ grep v4l2loopback -m1 -A1 | \
+ sed -e '1d' -e 's/\s//g')"
+ wf-recorder -x yuv420p -c rawvideo -m v4l2 -f $loopbackcam &
+ VIDEO_PID=$!
+ echo $$ > ~/.cache/recordingpid
+ echo "📺" > ~/.cache/recordingicon
+ notify-send "📺 Recording" "Screen share to fake webcam started"
+ killall -39 waybar
+ wait
+}
+
screencast () {
wf-recorder -f "$VREC_DIR/temp-$OUTPUT.mp4" &
VIDEO_PID=$!
@@ -94,10 +115,11 @@ audio () {
}
askrecording () {
- TYPE="$(printf "video\nscreencast\naudio\n" | bemenu -l 6 -i -p "What should be recorded?" --tf="$BEMENU_TF" --tb="$BEMENU_NB" --fb="$BEMENU_NB" --fn="$BEMENU_FN" --nb="$BEMENU_NB" --nf="$BEMENU_NF" --hf="$BEMENU_HF" --hb="$BEMENU_HB")"
+ TYPE="$(printf "video\nscreencast\nscreenshare\naudio\n" | bemenu -l 6 -i -p "What should be recorded?" --tf="$BEMENU_TF" --tb="$BEMENU_NB" --fb="$BEMENU_NB" --fn="$BEMENU_FN" --nb="$BEMENU_NB" --nf="$BEMENU_NF" --hf="$BEMENU_HF" --hb="$BEMENU_HB")"
case "$TYPE" in
video) video;;
screencast) screencast;;
+ screenshare) screenshare;;
audio) audio;;
*) exit;;
esac
@@ -111,6 +133,7 @@ fi
case $1 in
video) video;;
screencast) screencast;;
+ screenshare) screenshare;;
audio) audio;;
kill) killrecording;;
*) askrecording;;
--
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