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Swaywm screen and audio recording
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#!/bin/bash | |
# Sway WM screen + audio recorder | |
# original author: Aaron D. Fields | |
# blog post: https://blog.spirotot.com/2017/08/21/a-dirty-hack-to-enable-acceptable-sway-wm-screen-recording/ | |
# currently error 503 :-( | |
# | |
# Updated version: ernierasta | |
# Repo: https://gist.github.com/ernierasta | |
# | |
# Changelog: | |
# - switched to wf-recorder (https://github.com/ammen99/wf-recorder), swaygrab do not work anymore | |
# - switched to pulseaudio sound recording, this will allow us to record specific streams to separate | |
# files and to capture sounds from apps and microphone | |
# - added option to run set output without -o parameter | |
# - script will keep temporary files, they can be useful for manual merge (volume adjustments, cuts, ...) | |
# in something like openshot | |
# - more documentation | |
# - added -n option to disable post-processing (video resizing + audio,video merging) | |
# | |
# Usage: sway-record -d [display] -a [app audio sink] -m [mic audio sink] -o [project_output_name] -n | |
# or alternatively: | |
# sway-record project_output_name | |
# | |
# When you finish recording, pres CTRL+C and it will stop all processes. | |
# | |
# -n option allows to disable post-processing entirely | |
# | |
# | |
# INSTALL & SETTINGS: | |
# | |
# Copy this file as /usr/local/bin/sway-recorder or to any other dir in your $PATH. | |
# | |
# Displays can be listed with: | |
# | |
# swaymsg -t get_outputs | |
# | |
# PulseAudio sinks can be listed by: parecord -d <TAB> or: | |
# | |
# pacmd list-source-outputs | grep "source" | grep -oP "<\K[^ >]+" | |
# | |
# Dependencies: ffmpeg, pulseaudio, wf-recorder | |
# | |
# WARNING: you probably need to compile wf-recorder, follow instructions on project page(https://github.com/ammen99/wf-recorder). | |
# | |
# Example: sway-record -d DP-1 -a alsa_output.pci-0000_21_00.3.analog-stereo.monitor -m alsa_input.usb-audio-technica____AT2020_USB-00.analog-stereo my_recording | |
# | |
# Note: If this file is sorely out of date, it's either no longer relevant, | |
# and/or I decided to push changes here: https://github.com/Spirotot/dotFiles | |
# Note 2: Maybe I am blind ... do not see this in repo. ;-) ErnieRasta | |
# Note 3: This in no more outdated! Works with sway 1.0 RC5 | |
# You can define some defaults, which is very convinient... | |
DISP="DP-1" | |
AUDIO_APP="alsa_output.pci-0000_21_00.3.analog-stereo.monitor" | |
AUDIO_MIC="alsa_input.usb-audio-technica____AT2020_USB-00.analog-stereo" | |
OUTPUT="record" | |
# change to true if you want to disable post-processing entirely | |
NO_PROCESSING=false | |
# You probably want to leave vars below empty | |
SCREEN_CMD="" | |
AUDIO_APP_CMD="" | |
AUDIO_MIC_CMD="" | |
# These for sure should be empty! | |
SCREEN_PID="" | |
AUDIO_APP_PID="" | |
AUDIO_MIC_PID="" | |
START="" | |
# Set a trap for Ctrl+C (SIGINT) so that we can forward the | |
# Ctrl+C to the `swaygrab` and `arecord` subprocesses. | |
# Inspired by: https://stackoverflow.com/questions/8993655/can-a-bash-script-run-simultaneous-commands-then-wait-for-them-to-complete | |
trap killandconvert SIGINT | |
# `killandconvert()` kills the `swaygrab` and `arecord` subprocesses | |
# when Ctrl+C is pressed, and then proceeds to fix up the length | |
# discrepencies, and create the final output MKV. | |
killandconvert() { | |
# Forward the SIGINT to `swagrab` and `arecord` so they can shut | |
# themselves down properly. | |
kill -2 $SCREEN_PID | |
kill -2 $AUDIO_APP_PID | |
kill -2 $AUDIO_MIC_PID | |
# Wait for them to exit... | |
wait $AUDIO_APP_PID | |
wait $AUDIO_MIC_PID | |
wait $SCREEN_PID | |
if [ "$NO_PROCESSING" = true ]; then | |
return | |
fi | |
# Get the lengths: | |
# * https://forum.videolan.org/viewtopic.php?t=56438 | |
# * https://stackoverflow.com/questions/20323640/ffmpeg-deocde-without-producing-output-file | |
# Convert the lengths with awk: https://askubuntu.com/questions/407743/convert-time-stamp-to-seconds-in-bash | |
SCREEN_LENGTH=`ffmpeg -i ${OUTPUT}_orig.mkv -f null /dev/null 2>&1 | \ | |
grep Duration | awk '{print $2}' | tr -d "," | \ | |
awk -F: '{print ($1 * 3600) + ($2 * 60) + $3}'` | |
if [ "$START" = "" ]; then | |
AUDIO_LENGTH=`ffmpeg -i ${OUTPUT}_app_orig.wav -f null /dev/null 2>&1 | \ | |
grep Duration | awk '{print $2}' | tr -d "," | \ | |
awk -F: '{print ($1 * 3600) + ($2 * 60) + $3}'` | |
else | |
# https://unix.stackexchange.com/questions/53841/how-to-use-a-timer-in-bash | |
AUDIO_LENGTH=$((SECONDS - START)) | |
fi | |
# Calculate the multiplier used to sync the video to the audio. | |
# https://stackoverflow.com/questions/12722095/how-do-i-use-floating-point-division-in-bash | |
MULTIPLIER=`bc -l <<< "scale=8; $AUDIO_LENGTH/$SCREEN_LENGTH"` | |
# "Sync" the video to the audio by stretching it. | |
# https://trac.ffmpeg.org/wiki/How%20to%20speed%20up%20/%20slow%20down%20a%20video | |
`ffmpeg -i ${OUTPUT}_orig.mkv -filter:v "setpts=${MULTIPLIER}*PTS" \ | |
-preset ultrafast ${OUTPUT}_tmp.mkv` | |
if [ "$START" = "" ]; then | |
# Combine the video and audio streams into one output file. | |
# mixing: https://stackoverflow.com/questions/50168993/merging-2-audios-files-with-a-video-in-ffmpeg | |
`ffmpeg -i ${OUTPUT}_tmp.mkv -i ${OUTPUT}_app_orig.wav -i ${OUTPUT}_mic_orig.wav \ | |
-filter_complex "[1][2]amix=inputs=2[a]" \ | |
-map 0:v -map "[a]" \ | |
-c:v copy -c:a aac ${OUTPUT}.mkv` | |
else | |
# If there is no audio stream, then just rename the video stream | |
# as the final outout file. | |
mv ${OUTPUT}_tmp.mkv ${OUTPUT}.mkv | |
fi | |
# Cleanup | |
#rm -f ${OUTPUT}_orig.mkv | |
#rm -f ${OUTPUT}_tmp.mkv | |
#rm -f ${OUTPUT}_orig.wav | |
} | |
# mandatory trick to enable non-option parameter | |
# https://stackoverflow.com/questions/21753340/script-with-non-option-and-option-arguments | |
mandatory=() | |
# Parse the command line options... | |
# http://abhipandey.com/2016/03/getopt-vs-getopts/ | |
while [ $# -gt 0 ] && [ "$1" != "--" ]; do | |
while getopts d:a:m:o:n FLAG; do | |
case $FLAG in | |
d) | |
DISP=$OPTARG | |
;; | |
a) | |
AUDIO_APP=$OPTARG | |
;; | |
m) | |
AUDIO_MIC=$OPTARG | |
;; | |
o) | |
OUTPUT=$OPTARG | |
;; | |
n) | |
NO_PROCESSING=true | |
echo "NO PROCESSING!" | |
;; | |
esac | |
done | |
shift $((OPTIND-1)) | |
while [ $# -gt 0 ] && ! [[ "$1" =~ ^- ]]; do | |
mandatory=("${mandatory[@]}" "$1") | |
shift | |
done | |
done | |
if [ "$1" == "--" ]; then | |
shift | |
mandatory=("${mandatory[@]}" "$@") | |
fi | |
if [ "${mandatory[0]}" != "" ]; then | |
echo ${mandatory[0]} | |
OUTPUT=${mandatory[0]} | |
fi | |
# Check the user's options to make sure they're somewhat sane. | |
if [ "$OUTPUT" = "" ]; then | |
echo "No output specified." | |
exit 1 | |
fi | |
if [ "$DISP" = "" ]; then | |
echo "No display specified." | |
exit 1 | |
else | |
# Build the command used for screen recording. | |
SCREEN_CMD="wf-recorder -o $DISP -f ${OUTPUT}_orig.mkv" | |
fi | |
# Build the command used for app audio recording. | |
AUDIO_APP_CMD="parecord -d ${AUDIO_APP} ${OUTPUT}_app_orig.wav" | |
AUDIO_MIC_CMD="parecord -d ${AUDIO_MIC} ${OUTPUT}_mic_orig.wav" | |
# Start the screen recorder... | |
$SCREEN_CMD & | |
# ... and save the PID so we can kill it gracefully later. | |
SCREEN_PID=$! | |
if [ ! "$AUDIO_APP_CMD" = "" ]; then | |
# Start the audio recorder... | |
$AUDIO_APP_CMD & | |
# ... and save the PID so we can kill it gracefully later. | |
AUDIO_APP_PID=$! | |
else | |
# Unless we're not going to record audio, in which case we'll | |
# simply use a timer to figure out how much we need to stretch | |
# the video... | |
# https://unix.stackexchange.com/questions/53841/how-to-use-a-timer-in-bash | |
START=$SECONDS | |
fi | |
if [ ! "$AUDIO_MIC_CMD" = "" ]; then | |
# Start the audio recorder... | |
$AUDIO_MIC_CMD & | |
# ... and save the PID so we can kill it gracefully later. | |
AUDIO_MIC_PID=$! | |
else | |
# Unless we're not going to record audio, in which case we'll | |
# simply use a timer to figure out how much we need to stretch | |
# the video... | |
# https://unix.stackexchange.com/questions/53841/how-to-use-a-timer-in-bash | |
START=$SECONDS | |
fi | |
# Just hang out until the user presses Ctrl+C | |
wait |
I just connected the headset and put the headphones out of view whilst recording ;-).
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Wow, that is interesting problem, I am sorry mate, but I do not have BT headset to test it ...