screencast.sh

#!/bin/sh
cd "/run/media/michael/Backup/Screencasts Raw/"
echo "Select monitor device:"
pactl list sinks | sed -rn 's/\s+Description: (.*)/\1/p' | nl
read -p "? "
monitor=$(pactl list sinks | sed -rn 's/\s+Name: (.*)/\1/p' | sed -n "${REPLY}p")
pacmd set-default-sink ${monitor}

echo "Select microphone:"
pactl list sources | sed -rn '/Monitor of/d; s/\s+Description: (.*)/\1/p' | nl
read -p "? "
mic=$(pactl list sources | sed -rn '/\.monitor/d; s/\s+Name: (.*)/\1/p' | sed -n "${REPLY}p")
pacmd set-default-source ${mic}

command="ffcast -w ffmpeg -- -f pulse -i ${mic}"
nstreams=1
read -p "Add application stream? (Y/n) " -n 1 -r
echo

while [[ ! $REPLY =~ [Nn] ]]; do
    pactl list sink-inputs | nl | sed -rn 's/\s+application\.name = "(.*)"/\t\1/p'
    read -p "? "
    stream=$(pactl list sink-inputs | nl | tac | sed -rn "/^\s*${REPLY}/,/Sink Input/s/.*Sink Input \#([0-9]+)/\1/p")
    sink_name="null${stream}"
    null_idx=$(pactl load-module module-null-sink sink_name=$sink_name)
    pacmd update-sink-proplist $sink_name device.description=$sink_name
    loop_idx=$(pactl load-module module-loopback source=${sink_name}.monitor sink=$monitor sink_input_properties=media.name=loop${stream})
    pactl move-sink-input $stream $sink_name
    nstreams=$((nstreams+1))
    command="${command} -f pulse -i ${sink_name}.monitor"
    read -p "Add application stream? (Y/n) " -n 1 -r
    echo
done

command="${command} -filter_complex amerge=inputs=${nstreams} -acodec pcm_s16le -vcodec libx264 -preset ultrafast -crf 0 -threads 0 screencast-$(date +%Y%m%d%H%M%S).mkv"
echo $command
$command

pactl unload-module module-null-sink
pactl unload-module module-loopback

screencast_convert.sh

#!/bin/sh
if [[ $# -eq 1 ]]; then
    ffmpeg -i "$1" -acodec flac -vcodec libx264 -preset slow -crf 22 -threads 0 /run/media/michael/Backup/Screencasts\ Converted/$(basename "$1")
elif [[ $# -eq 2 ]]; then
    ffmpeg -i "$1" -i "$2" -acodec copy -vcodec libx264 -preset slow -crf 22 -threads 0 -map 0:v:0 -map 1:a:0 /run/media/michael/Backup/Screencasts\ Converted/$(basename "$1")
else
    echo "Usage: $0 video.mkv [audio.flac]"
fi