Merge pull request #2344 from OsaAjani/issue-2338

Add support for default pillow font

CHANGELOG.md

@@ -16,6 +16,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Add codecs to .mov files
 - Add background radius to text clips
 - Support pillow 11
+- Add support for Pillow default font on textclip
 - Add support for ffmpeg v7
 
 ### Changed <!-- for changes in existing functionality -->

moviepy/video/VideoClip.py

@@ -1450,7 +1450,8 @@ class TextClip(ImageClip):
     ----------
 
     font
-      Path to the font to use. Must be an OpenType font.
+      Path to the font to use. Must be an OpenType font. If set to None
+      (default) will use Pillow default font
 
     text
       A string of the text to write. Can be replaced by argument
@@ -1549,7 +1550,7 @@ class TextClip(ImageClip):
     @convert_path_to_string("filename")
     def __init__(
         self,
-        font,
+        font=None,
         text=None,
         filename=None,
         font_size=None,
@@ -1567,12 +1568,13 @@ def __init__(
         transparent=True,
         duration=None,
     ):
-        try:
-            _ = ImageFont.truetype(font)
-        except Exception as e:
-            raise ValueError(
-                "Invalid font {}, pillow failed to use it with error {}".format(font, e)
-            )
+        if font is not None:
+            try:
+                _ = ImageFont.truetype(font)
+            except Exception as e:
+                raise ValueError(
+                    "Invalid font {}, pillow failed to use it with error {}".format(font, e)
+                )
 
         if filename:
             with open(filename, "r") as file:
@@ -1620,30 +1622,30 @@ def __init__(
                     allow_break=True,
                 )
 
-            if img_height is None:
-                img_height = self.__find_text_size(
+            # Add line breaks whenever needed
+            text = "\n".join(
+                self.__break_text(
+                    width=img_width,
                     text=text,
                     font=font,
                     font_size=font_size,
                     stroke_width=stroke_width,
                     align=text_align,
                     spacing=interline,
-                    max_width=img_width,
-                    allow_break=True,
-                )[1]
+                )
+            )
 
-            # Add line breaks whenever needed
-            text = "\n".join(
-                self.__break_text(
-                    width=img_width,
+            if img_height is None:
+                img_height = self.__find_text_size(
                     text=text,
                     font=font,
                     font_size=font_size,
                     stroke_width=stroke_width,
                     align=text_align,
                     spacing=interline,
-                )
-            )
+                    max_width=img_width,
+                    allow_break=True,
+                )[1]
 
         elif method == "label":
             if font_size is None and img_width is None:
@@ -1693,7 +1695,10 @@ def __init__(
             bg_color = (0, 0, 0, 0)
 
         img = Image.new(img_mode, (img_width, img_height), color=bg_color)
-        pil_font = ImageFont.truetype(font, font_size)
+        if font:
+            pil_font = ImageFont.truetype(font, font_size)
+        else:
+            pil_font = ImageFont.load_default(font_size)
         draw = ImageDraw.Draw(img)
 
         # Dont need allow break here, because we already breaked in caption
@@ -1760,7 +1765,10 @@ def __break_text(
     ) -> List[str]:
         """Break text to never overflow a width"""
         img = Image.new("RGB", (1, 1))
-        font_pil = ImageFont.truetype(font, font_size)
+        if font:
+            font_pil = ImageFont.truetype(font, font_size)
+        else:
+            font_pil = ImageFont.load_default(font_size)
         draw = ImageDraw.Draw(img)
 
         lines = []
@@ -1843,7 +1851,10 @@ def __find_text_size(
               ``real_font_size + (stroke_width * 2) + (lines - 1) * height``
         """
         img = Image.new("RGB", (1, 1))
-        font_pil = ImageFont.truetype(font, font_size)
+        if font:
+            font_pil = ImageFont.truetype(font, font_size)
+        else:
+            font_pil = ImageFont.load_default(font_size)
         ascent, descent = font_pil.getmetrics()
         real_font_size = ascent + descent
         draw = ImageDraw.Draw(img)

tests/test_TextClip.py

@@ -133,5 +133,12 @@ def test_label_autosizing(util):
     assert not np.allclose(last_three_columns, [0, 0, 0], rtol=0.01)
 
 
+def test_no_font(util):
+    # Try make a clip with default font
+    clip = TextClip(text="Hello world !", font_size=20, color="white")
+    clip.show(1)
+    assert clip.size[0] > 10
+
+
 if __name__ == "__main__":
     pytest.main()