初次提交

entity/VideoClip.py

@@ -0,0 +1,18 @@
+from typing import Optional
+
+from entity.File import File
+
+
+class VideoClip(File):
+    duration: Optional[float]
+
+    def __init__(self, file, base_path):
+        super(VideoClip, self).__init__(file, base_path)
+        self.duration = None
+
+    def set_duration(self, duration: Optional[float]):
+        self.duration = duration
+
+    def evaluate_duration(self):
+        if self.duration is None or self.duration < 0:
+            ...