Added footage decode featue

ptulsconv/footage.py

@@ -1,20 +1,18 @@
 from fractions import Fraction
 import re
-import math
-from collections import namedtuple
 from typing import Optional
 
 def footage_to_seconds(footage: str) -> Optional[Fraction]:
-    m = re.match(r'(\d+)\+(\d+)(\.\d+)?')
+    m = re.match(r'(\d+)\+(\d+)(\.\d+)?', footage)
     if m is None:
         return None
 
-    feet, frames = m.groups()
+    feet, frames, _ = m.groups()
     feet, frames = int(feet), int(frames)
 
     fps = 24
     frames_per_foot = 16
 
-    total_frames = feet * 16 + frames
+    total_frames = feet * frames_per_foot + frames
 
-    return Fraction(total_frames, fps)
+    return Fraction(total_frames, fps)

tests/unittests/test_footage.py

@@ -0,0 +1,15 @@
+import unittest
+from ptulsconv import footage
+
+class TestFootage(unittest.TestCase):
+    def test_basic_footage(self):
+        r1 = "90+0"
+        f1 = footage.footage_to_seconds(r1)
+        self.assertEqual(float(f1 or 0), 60.0)
+
+    def test_feet_and_frames(self):
+        r1 = "1+8"
+        f1 = footage.footage_to_seconds(r1)
+        self.assertEqual(float(f1 or 0), 1.0)
+
+