From ed8982da0e78981b725cf47c66ab42e0538b103c Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Fri, 1 May 2026 05:09:57 +0000
Subject: [PATCH] =?UTF-8?q?Fix=20afade:=20bc=20omits=20leading=20zero=20fo?=
 =?UTF-8?q?r=20values=20<=201=20(.850=20=E2=86=92=200.850)?=
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Content-Transfer-Encoding: 8bit

fade_dur = SUNRISE_TARGET_SECS * 0.085 = 0.850 at the default 10s target.
bc outputs .850 without a leading zero, which ffmpeg's afade filter rejects
with "Unable to parse option value .850 as duration". Pipe bc output through
sed to prepend the zero when the value starts with '.'.

https://claude.ai/code/session_01DANuzLCLhhQ7Li12RTcswY
---
 daily_sunrise_video.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/daily_sunrise_video.sh b/daily_sunrise_video.sh
index 8e1db4d..eeaa7bd 100755
--- a/daily_sunrise_video.sh
+++ b/daily_sunrise_video.sh
@@ -440,8 +440,8 @@ if $TEST_MODE; then
 else
     final_video="$output_dir/$CAM_NAME-$current_date-daily-sunrise.mp4"
 fi
-fade_dur=$(echo "scale=3; $SUNRISE_TARGET_SECS * 0.085" | bc)
-fade_out=$(echo "scale=3; $SUNRISE_TARGET_SECS - $fade_dur" | bc)
+fade_dur=$(echo "scale=3; $SUNRISE_TARGET_SECS * 0.085" | bc | sed 's/^\./0./')
+fade_out=$(echo "scale=3; $SUNRISE_TARGET_SECS - $fade_dur" | bc | sed 's/^\./0./')
 
 # ── Step 3a: mix audio (video copied, not re-encoded) ────────────────────────
 work_video="$sped_video"