percent based resolution

app.py

@@ -124,13 +124,12 @@ def process_video():
             if width and height:
                 filters.append(f"crop={width}:{height}:{x}:{y}")
         
-        # Add scale filter if resolution specified
-        resolution = data.get('resolution')
-        if resolution:
-            width = resolution.get('width')
-            height = resolution.get('height')
-            if width and height:
-                filters.append(f"scale={width}:{height}")
+        # Add scale filter if scale percentage specified (not 100%)
+        scale_percentage = data.get('scale_percentage', 100)
+        if scale_percentage != 100:
+            # Scale based on percentage - ffmpeg will apply this after crop
+            scale_filter = f"scale=iw*{scale_percentage/100}:ih*{scale_percentage/100}"
+            filters.append(scale_filter)
         
         # Apply filters if any
         if filters: