Redesign replay to save to file and continue on SIGUSR1

replay.sh

@@ -1,4 +1,6 @@
-#!/bin/sh
+#!/bin/sh -e
 
-[ "$#" -ne 5 ] && echo "usage: replay.sh <window_id> <fps> <audio_input> <replay_time_sec> <output_file>" && exit 1
-./gpu-screen-recorder -w "$1" -c mp4 -f "$2" -a "$3" -r "$4" -o "$5"
+[ "$#" -ne 4 ] && echo "usage: replay.sh <window_id> <fps> <replay_time_sec> <output_directory>" && exit 1
+active_sink="$(pactl get-default-sink).monitor"
+mkdir -p "$4"
+./gpu-screen-recorder -w "$1" -c mp4 -f "$2" -a "$active_sink" -r "$3" -o "$4"