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dotfiles/.local/bin/dmenurecord

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#!/bin/sh
# Usage:
# `$0`: Ask for recording type via dmenu
# `$0 screencast`: Record both audio and screen
# `$0 video`: Record only screen
# `$0 audio`: Record only audio
# `$0 kill`: Kill existing recording
#
# If there is already a running instance, user will be prompted to end it.
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updateicon() {
echo "$1" >/tmp/recordingicon
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pkill -RTMIN+9 "${STATUSBAR:-dwmblocks}"
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}
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killrecording() {
recpid="$(cat /tmp/recordingpid)"
# kill with SIGTERM, allowing finishing touches.
kill -15 "$recpid"
rm -f /tmp/recordingpid
updateicon ""
pkill -RTMIN+9 "${STATUSBAR:-dwmblocks}"
# even after SIGTERM, ffmpeg may still run, so SIGKILL it.
sleep 3
kill -9 "$recpid"
exit
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}
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screencast() {
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ffmpeg -y \
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-f x11grab \
-framerate 60 \
-s "$(xdpyinfo | awk '/dimensions/ {print $2;}')" \
-i "$DISPLAY" \
-f alsa -i default \
-r 30 \
-c:v h264 -crf 0 -preset ultrafast -c:a aac \
"$HOME/screencast-$(date '+%y%m%d-%H%M-%S').mp4" &
echo $! >/tmp/recordingpid
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updateicon "ﲠ"
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}
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video() {
ffmpeg \
-f x11grab \
-s "$(xdpyinfo | awk '/dimensions/ {print $2;}')" \
-i "$DISPLAY" \
-c:v libx264 -qp 0 -r 30 \
"$HOME/video-$(date '+%y%m%d-%H%M-%S').mkv" &
echo $! >/tmp/recordingpid
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updateicon "ﲣ"
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}
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webcamhidef() {
ffmpeg \
-f v4l2 \
-i /dev/video0 \
-video_size 1920x1080 \
"$HOME/webcam-$(date '+%y%m%d-%H%M-%S').mkv" &
echo $! >/tmp/recordingpid
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updateicon ""
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}
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webcam() {
ffmpeg \
-f v4l2 \
-i /dev/video0 \
-video_size 640x480 \
"$HOME/webcam-$(date '+%y%m%d-%H%M-%S').mkv" &
echo $! >/tmp/recordingpid
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updateicon ""
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}
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audio() {
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ffmpeg \
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-f alsa -i default \
-c:a flac \
"$HOME/audio-$(date '+%y%m%d-%H%M-%S').flac" &
echo $! >/tmp/recordingpid
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updateicon ""
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}
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askrecording() {
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choice=$(printf "screencast\\nvideo\\nvideo selected\\naudio\\nwebcam\\nwebcam (hi-def)" | dmenu -i -p "Select recording style:")
case "$choice" in
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screencast) screencast ;;
audio) audio ;;
video) video ;;
*selected) videoselected ;;
webcam) webcam ;;
"webcam (hi-def)") webcamhidef ;;
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esac
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}
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asktoend() {
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response=$(printf "No\\nYes" | dmenu -i -p "Recording still active. End recording?") &&
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[ "$response" = "Yes" ] && killrecording
}
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videoselected() {
slop -f "%x %y %w %h" >/tmp/slop
read -r X Y W H </tmp/slop
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rm /tmp/slop
ffmpeg \
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-f x11grab \
-framerate 60 \
-video_size "$W"x"$H" \
-i :0.0+"$X,$Y" \
-c:v libx264 -qp 0 -r 30 \
"$HOME/box-$(date '+%y%m%d-%H%M-%S').mkv" &
echo $! >/tmp/recordingpid
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updateicon "ﲣ"
}
case "$1" in
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screencast) screencast ;;
audio) audio ;;
video) video ;;
*selected) videoselected ;;
kill) killrecording ;;
*) ([ -f /tmp/recordingpid ] && asktoend && exit) || askrecording ;;
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esac