From d0a5fa5f91c70c81ff12f959832f6d7d2a296f82 Mon Sep 17 00:00:00 2001
From: Lab 8916100448256 <lab.8916100448256@gmail.com>
Date: Fri, 4 Dec 2020 23:21:56 +0100
Subject: [PATCH] Add beeps every 10 seconds in the pattern stream, when the
 time elapsed overlay hits the borders, to allow checking for audio/video sync

---
 gen_pattern_sine.sh    | 3 +--
 stream_pattern_sine.sh | 2 +-
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/gen_pattern_sine.sh b/gen_pattern_sine.sh
index 0c6bb5e..e5528d5 100755
--- a/gen_pattern_sine.sh
+++ b/gen_pattern_sine.sh
@@ -55,7 +55,6 @@ echo " "
 
 rm $FILENAME
 
-#-x264opts nal-hrd=cbr:force-cfr=1:vbv-bufsize=${BUFFERSIZE}:bitrate=${VBITRATE}:vbv-maxrate=${VBITRATE} \
 
 ffmpeg \
 -loglevel level \
@@ -66,7 +65,7 @@ ffmpeg \
 -ac 2 \
 -i Mire_1080p.png \
 -f lavfi \
--i aevalsrc="0.1*sin(2*PI*(360-2.5/2)*t)|0.1*sin(2*PI*(360+2.5/2)*t):sample_rate=48000" \
+-i aevalsrc="(1-min(1\,mod(floor(5*t)\,50)))*0.1*sin(8*PI*(360-2.5/2)*t)+0.1*sin(2*PI*(360-2.5/2)*t)|(1-min(1\,mod(floor(5*t)\,50)))*0.1*sin(8*PI*(360+2.5/2)*t)+0.1*sin(2*PI*(360+2.5/2)*t):sample_rate=48000" \
 -channel_layout stereo \
 -ar 48000 \
 -shortest \
diff --git a/stream_pattern_sine.sh b/stream_pattern_sine.sh
index 38e60de..4de0da7 100755
--- a/stream_pattern_sine.sh
+++ b/stream_pattern_sine.sh
@@ -69,7 +69,7 @@ ffmpeg \
 -i Mire_1080p.png \
 -re \
 -f lavfi \
--i aevalsrc="0.1*sin(2*PI*(360-2.5/2)*t)|0.1*sin(2*PI*(360+2.5/2)*t):sample_rate=48000" \
+-i aevalsrc="(1-min(1\,mod(floor(5*t)\,50)))*0.1*sin(8*PI*(360-2.5/2)*t)+0.1*sin(2*PI*(360-2.5/2)*t)|(1-min(1\,mod(floor(5*t)\,50)))*0.1*sin(8*PI*(360+2.5/2)*t)+0.1*sin(2*PI*(360+2.5/2)*t):sample_rate=48000" \
 -channel_layout stereo \
 -ar 48000 \
 -pixel_format yuv420p \