initial commit and version 1.0

moviepy/video/fx/SlideIn.py

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+from dataclasses import dataclass
+
+from moviepy.Clip import Clip
+from moviepy.Effect import Effect
+
+
+@dataclass
+class SlideIn(Effect):
+    """Makes the clip arrive from one side of the screen.
+
+    Only works when the clip is included in a CompositeVideoClip,
+    and if the clip has the same size as the whole composition.
+
+    Parameters
+    ----------
+
+    clip : moviepy.Clip.Clip
+      A video clip.
+
+    duration : float
+      Time taken for the clip to be fully visible
+
+    side : str
+      Side of the screen where the clip comes from. One of
+      'top', 'bottom', 'left' or 'right'.
+
+    Examples
+    --------
+
+    .. code:: python
+
+        from moviepy import *
+
+        clips = [... make a list of clips]
+        slided_clips = [
+            CompositeVideoClip([clip.with_effects([vfx.SlideIn(1, "left")])])
+            for clip in clips
+        ]
+        final_clip = concatenate_videoclips(slided_clips, padding=-1)
+
+        clip = ColorClip(
+            color=(255, 0, 0), duration=1, size=(300, 300)
+        ).with_fps(60)
+        final_clip = CompositeVideoClip([clip.with_effects([vfx.SlideIn(1, "right")])])
+    """
+
+    duration: float
+    side: str
+
+    def apply(self, clip: Clip) -> Clip:
+        """Apply the effect to the clip."""
+        w, h = clip.size
+        pos_dict = {
+            "left": lambda t: (min(0, w * (t / self.duration - 1)), "center"),
+            "right": lambda t: (max(0, w * (1 - t / self.duration)), "center"),
+            "top": lambda t: ("center", min(0, h * (t / self.duration - 1))),
+            "bottom": lambda t: ("center", max(0, h * (1 - t / self.duration))),
+        }
+
+        return clip.with_position(pos_dict[self.side])