From 8b79261b8171339cb27003c7a378f3bd4c21d8de Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Wed, 22 Apr 2026 16:32:47 +0000
Subject: [PATCH 1/2] =?UTF-8?q?4-seasons:=20remove=20fps=3D25=20from=20spe?=
 =?UTF-8?q?ed-adjust=20=E2=80=94=20keep=20all=20source=20frames?=
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Content-Type: text/plain; charset=UTF-8
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fps=25 caused ffmpeg to discard 15 of every 16 source frames, making
the final clip jump by ~2.5 minutes per frame.  The original script
had no fps filter, so all source frames were preserved.  Without it,
the setpts speed-adjust keeps every frame; the effective framerate in
the output rises proportionally (e.g. ~400fps for a full day at 10s
intervals into an 11s clip), which is fine for H.264 and all
downstream montage steps.

https://claude.ai/code/session_01C4jbd3waXG3eKZYbGUjLUQ
---
 4-seasons.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/4-seasons.sh b/4-seasons.sh
index 484ac2f..49c539a 100755
--- a/4-seasons.sh
+++ b/4-seasons.sh
@@ -153,7 +153,7 @@ echo "Step 2/2: speed factor $speed_factor..."
 final_file="$output_dir/${CAM_NAME}-${yesterday}_Mvt${MVT_NUM}-Day${DAY_OF_MVT}of${DAYS_IN_MVT}-final.mp4"
 if ! ffmpeg -loglevel warning \
     -i "$temp_video" \
-    -vf "setpts=PTS/$speed_factor,fps=25" \
+    -vf "setpts=PTS/$speed_factor" \
     -c:v libx264 -pix_fmt yuv420p -preset "$ENCODE_PRESET" -crf "$CRF_SEASONS_FINAL" \
     -t "$target_per_clip" -an \
     -y "$final_file"; then

From 32bd64459e5d48d440345b8d74a2111cb1d764bf Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Wed, 22 Apr 2026 16:58:16 +0000
Subject: [PATCH 2/2] 4-seasons: exit cleanly when all frames fail validation

Accessing ${images[-1]} on an empty array under set -u causes a bash
error.  Guard with an explicit check so a fully-corrupt image directory
exits with a clear message instead of a cryptic crash.

https://claude.ai/code/session_01C4jbd3waXG3eKZYbGUjLUQ
---
 4-seasons.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/4-seasons.sh b/4-seasons.sh
index 49c539a..f480596 100755
--- a/4-seasons.sh
+++ b/4-seasons.sh
@@ -123,6 +123,11 @@ done
 [ "$bad"  -gt 0 ] && echo "WARNING: skipped $bad corrupt/empty frame(s) of ${#all_images[@]}"
 [ "$grey" -gt 0 ] && echo "INFO: skipped $grey grey/uniform frame(s) (SEASONS_GREY_STDDEV_MIN=${GREY_MIN})"
 
+if [ "${#images[@]}" -eq 0 ]; then
+    echo "ERROR: no valid images remain after filtering — skipping $yesterday."
+    exit 0
+fi
+
 for img in "${images[@]}"; do
     printf "file '%s'\nduration %s\n" "$img" "$INTERVAL"
 done > "$temp_file"