diff --git a/4-seasons.sh b/4-seasons.sh
index 484ac2f..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"
@@ -153,7 +158,7 @@ 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