Update main.py

main.py

@@ -96,8 +96,9 @@ async def create_slideshow(image_paths, audio_path, output_path, duration, zoom=
         # Add each image with zoompan effect
         for i, img in enumerate(image_paths):
             inputs.extend(["-loop", "1", "-t", str(duration), "-i", img])
-            # Apply zoom effect: start at 100% size and zoom to 110% over the duration
-            filter_complex += f"[{i}:v]scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:(ow-iw)/2:(oh-ih)/2,setsar=1,zoompan=z='min(zoom+0.0015,1.1)':d={duration*25}:s=1920x1080[v{i}];"
+            # Apply zoom effect with custom formula
+            zoompan_params = f"z='1+(0.04*{duration})*on/{duration*25}':x='iw/2-(iw/zoom/2)':y='ih/2-(ih/zoom/2)':d={duration*25}:s=1920x1080"
+            filter_complex += f"[{i}:v]scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:(ow-iw)/2:(oh-ih)/2,setsar=1,zoompan={zoompan_params}[v{i}];"
         
         # Concatenate all video segments
         for i in range(len(image_paths)):