diff --git a/moviepy/video/VideoClip.py b/moviepy/video/VideoClip.py
index fd43a81a2..d8a3a96f5 100644
--- a/moviepy/video/VideoClip.py
+++ b/moviepy/video/VideoClip.py
@@ -1438,6 +1438,11 @@ class TextClip(ImageClip):
 
     duration
         Duration of the clip
+
+    bg_radius
+     A paramater to round the edges of the text background. Defaults to 0 if there
+     is no background. It will have no effect if there is no bg_colour added.
+     The higher the value, the more rounded the corners will become.
     """
 
     @convert_path_to_string("filename")
@@ -1460,6 +1465,7 @@ def __init__(
         interline=4,
         transparent=True,
         duration=None,
+        bg_radius=0,  # TODO : Move this with other bg_param on next breaking release
     ):
         def break_text(
             width, text, font, font_size, stroke_width, align, spacing
@@ -1719,9 +1725,20 @@ def find_optimum_font_size(
         if bg_color is None and transparent:
             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)
-        draw = ImageDraw.Draw(img)
+        if bg_radius is None:
+            bg_radius = 0
+
+        if bg_radius != 0:
+            img = Image.new(img_mode, (img_width, img_height), color=(0, 0, 0, 0))
+            pil_font = ImageFont.truetype(font, font_size)
+            draw = ImageDraw.Draw(img)
+            draw.rounded_rectangle(
+                [0, 0, img_width, img_height], radius=bg_radius, fill=bg_color
+            )
+        else:
+            img = Image.new(img_mode, (img_width, img_height), color=bg_color)
+            pil_font = ImageFont.truetype(font, font_size)
+            draw = ImageDraw.Draw(img)
 
         # Dont need allow break here, because we already breaked in caption
         text_width, text_height = find_text_size(
diff --git a/moviepy/video/fx/Scroll.py b/moviepy/video/fx/Scroll.py
index 1d469d112..d5c9d60a8 100644
--- a/moviepy/video/fx/Scroll.py
+++ b/moviepy/video/fx/Scroll.py
@@ -30,7 +30,6 @@ def __init__(
         y_start=0,
         apply_to="mask",
     ):
-
         self.w = w
         self.h = h
         self.x_speed = x_speed
diff --git a/moviepy/video/io/ffmpeg_reader.py b/moviepy/video/io/ffmpeg_reader.py
index b22aa2b6d..16700ee15 100644
--- a/moviepy/video/io/ffmpeg_reader.py
+++ b/moviepy/video/io/ffmpeg_reader.py
@@ -459,12 +459,12 @@ def parse(self):
                 # for default streams, set their numbers globally, so it's
                 # easy to get without iterating all
                 if self._current_stream["default"]:
-                    self.result[f"default_{stream_type_lower}_input_number"] = (
-                        input_number
-                    )
-                    self.result[f"default_{stream_type_lower}_stream_number"] = (
-                        stream_number
-                    )
+                    self.result[
+                        f"default_{stream_type_lower}_input_number"
+                    ] = input_number
+                    self.result[
+                        f"default_{stream_type_lower}_stream_number"
+                    ] = stream_number
 
                 # exit chapter
                 if self._current_chapter: