Update app.py

app.py

@@ -6,6 +6,8 @@ import librosa
 import numpy as np
 from pydub import AudioSegment
 from moviepy.editor import AudioFileClip, ImageClip, CompositeVideoClip
+# --- FIX: Import the video effects explicitly ---
+from moviepy.video.fx.all import blackwhite, lum_contrast
 import subprocess
 from pathlib import Path
 import sys
@@ -117,7 +119,7 @@ def package_and_export(track_folder_str, bpm, start_offset_sec, cover_art):
         make_loop(stems['Piano'], "PianoLoop")
         make_loop(stems['Vocals'], "VocalChop")
         
-# 3. Generate Video
+        # 3. Generate Video
         video_path = None
         if cover_art and created_loops['melody']:
             print("Rendering Dynamic Noir Video...")
@@ -132,11 +134,9 @@ def package_and_export(track_folder_str, bpm, start_offset_sec, cover_art):
             # 1. Force Black & White
             img = img.fx(blackwhite)
             # 2. Boost Contrast (make the blacks deeper, whites brighter)
-            # 'lum' is luminosity (0 for no change), 'contrast' is the multiplier. 
-            # 1.3 is a 30% contrast boost for that "gritty" look.
             img = img.fx(lum_contrast, lum=0, contrast=1.3) 
             # ------------------------------------
-
+            
             # Simple Zoom Animation
             img = img.resize(lambda t : 1 + 0.02*t) 
             img = img.set_position(('center', 'center'))