add Video(..., scale=1) keyword in #1168

docs/changes.md

@@ -11,6 +11,7 @@
 - fix `Arrow.top_index` to produce the correct index value
 - add `assembly.Group.objects` by @smoothumut
 - add `addons.DrawingWidget` class for tracing on planar props
+- add `Video(..., scale=1)` keyword in #1168 by @YongcaiHuang
 
 
 ## Soft-breaking Changes

examples/other/make_video.py

@@ -1,7 +1,6 @@
 """Make a video file with or without graphic window"""
 from vedo import dataurl, Plotter, Mesh, Video
 
-# settings.screeshot_scale = 2  # to get higher resolution
 
 msh = Mesh(dataurl+"spider.ply").rotate_x(-90)
 msh.texture(dataurl+"textures/leather.jpg")

vedo/file_io.py

@@ -1907,18 +1907,20 @@ class Video:
     Generate a video from a rendering window.
     """
 
-    def __init__(self, name="movie.mp4", duration=None, fps=24, backend="imageio"):
+    def __init__(self, name="movie.mp4", duration=None, fps=24, scale=1, backend="imageio"):
         """
         Class to generate a video from the specified rendering window.
         Program `ffmpeg` is used to create video from each generated frame.
 
         Arguments:
             name : (str)
                 name of the output file.
-            fps : (int)
-                set the number of frames per second.
             duration : (float)
                 set the total `duration` of the video and recalculates `fps` accordingly.
+            fps : (int)
+                set the number of frames per second.
+            scale : (int)
+                set the image magnification as an integer multiplicative factor.
             backend : (str)
                 the backend engine to be used `['imageio', 'ffmpeg', 'cv']`
 
@@ -1933,6 +1935,7 @@ def __init__(self, name="movie.mp4", duration=None, fps=24, backend="imageio"):
         self.fps = float(fps)
         self.command = "ffmpeg -loglevel panic -y -r"
         self.options = "-b:v 8000k"
+        self.scale = scale
 
         self.frames = []
         self.tmp_dir = TemporaryDirectory()
@@ -1942,7 +1945,7 @@ def __init__(self, name="movie.mp4", duration=None, fps=24, backend="imageio"):
     def add_frame(self) -> "Video":
         """Add frame to current video."""
         fr = self.get_filename(str(len(self.frames)) + ".png")
-        screenshot(fr)
+        screenshot(fr, scale=self.scale)
         self.frames.append(fr)
         return self