initial commit and version 1.0

moviepy/video/fx/MakeLoopable.py

@@ -0,0 +1,30 @@
+from dataclasses import dataclass
+
+from moviepy.Clip import Clip
+from moviepy.Effect import Effect
+from moviepy.video.compositing.CompositeVideoClip import CompositeVideoClip
+from moviepy.video.fx.CrossFadeIn import CrossFadeIn
+
+
+@dataclass
+class MakeLoopable(Effect):
+    """Makes the clip fade in progressively at its own end, this way it can be
+    looped indefinitely.
+
+    Parameters
+    ----------
+
+    overlap_duration : float
+      Duration of the fade-in (in seconds).
+    """
+
+    overlap_duration: float
+
+    def apply(self, clip: Clip) -> Clip:
+        """Apply the effect to the clip."""
+        clip2 = clip.with_effects([CrossFadeIn(self.overlap_duration)]).with_start(
+            clip.duration - self.overlap_duration
+        )
+        return CompositeVideoClip([clip, clip2]).subclipped(
+            self.overlap_duration, clip.duration
+        )