4-seasons: remove fps=25 from speed-adjust — keep all source frames

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

@@ -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