create pidfile and explain things more

stream.sh

@@ -19,6 +19,9 @@ HLS_LIST_SIZE=$(echo $DELETION_THRESHOLD / $HLS_TIME | bc)
 
 mkdir -p stream
 
+# This shell script's process ID, so we can tell if the stream is online or not
+echo $$ > stream/pid.txt
+
 # This exists so we can corrupt video streams of viewers who are too delayed
 ffmpeg -f lavfi -i color=size="$BOX_WIDTH"x"$BOX_HEIGHT":rate=$FRAMERATE:color=black \
     -f lavfi -i anullsrc=channel_layout=stereo:sample_rate=48000 \
@@ -30,7 +33,7 @@ ffmpeg -f lavfi -i color=size="$BOX_WIDTH"x"$BOX_HEIGHT":rate=$FRAMERATE:color=b
 rm stream/corrupt.m3u8 stream/init.mp4
 mv stream/corrupt0.m4s stream/corrupt.m4s
 
-
+# The current time, so we know when the stream started
 date +%s > stream/start.txt
 
 # This is the command you should edit