feat: add frame class extraction and formatting for media files

renamer/formatters/resolution_formatter.py

@@ -1,6 +1,44 @@
 class ResolutionFormatter:
-    """Class for formatting video resolutions"""
-    
+    """Class for formatting video resolutions and frame classes"""
+
+    @staticmethod
+    def get_frame_class_from_resolution(resolution: str) -> str:
+        """Convert resolution string (WIDTHxHEIGHT) to frame class (480p, 720p, etc.)"""
+        if not resolution:
+            return 'Unclassified'
+
+        try:
+            # Extract height from WIDTHxHEIGHT format
+            if 'x' in resolution:
+                height = int(resolution.split('x')[1])
+            else:
+                # Try to extract number directly
+                import re
+                match = re.search(r'(\d{3,4})', resolution)
+                if match:
+                    height = int(match.group(1))
+                else:
+                    return 'Unclassified'
+
+            if height == 4320:
+                return '4320p'
+            elif height >= 2160:
+                return '2160p'
+            elif height >= 1440:
+                return '1440p'
+            elif height >= 1080:
+                return '1080p'
+            elif height >= 720:
+                return '720p'
+            elif height >= 576:
+                return '576p'
+            elif height >= 480:
+                return '480p'
+            else:
+                return 'Unclassified'
+        except (ValueError, IndexError):
+            return 'Unclassified'
+
     @staticmethod
     def format_resolution_p(height: int) -> str:
         """Format resolution as 2160p, 1080p, etc."""
@@ -14,7 +52,7 @@ class ResolutionFormatter:
             return '480p'
         else:
             return f'{height}p'
-    
+
     @staticmethod
     def format_resolution_dimensions(width: int, height: int) -> str:
         """Format resolution as WIDTHxHEIGHT"""