diff --git a/render_kdenlive.py b/render_kdenlive.py
index 245d8aa..efcd480 100644
--- a/render_kdenlive.py
+++ b/render_kdenlive.py
@@ -65,7 +65,8 @@ class KDEnliveProject:
         self, root,
         width="1920", height="1080",
         display_aspect_num="16", display_aspect_den="9",
-        frame_rate_num="24", frame_rate_den="1"
+        frame_rate_num="24", frame_rate_den="1",
+        scale_to_fill=True
     ):
         self._duration = defaultdict(int)
         self._counters = defaultdict(int)
@@ -74,6 +75,7 @@ class KDEnliveProject:
         self._height = int(height)
         self._fps = int(frame_rate_num) / int(frame_rate_den)
         self.profile = 'atsc_1080p_24'
+        self.scale_to_fill = scale_to_fill
 
         self._tree = self.get_element("mlt", attrib={
             "LC_NUMERIC": "C",
@@ -627,20 +629,38 @@ class KDEnliveProject:
         idx = self._tree.index(track) - 1
         self._tree.insert(idx, chain)
         filters_ = []
-        if track_id == 'V':
-            filters_.append({
-                self.get_element("filter", [
-                    ["mlt_service", "qtblend"],
-                    ["kdenlive_id", "qtblend"],
-                    ["rotate_center", "1"],
-                    ["rect", "00:00:00.000=0 0 %s %s 1.000000" % (self._width, self.height)],
-                    ["rotation", "00:00:00.000=0"],
-                    ["compositing", "0"],
-                    ["distort", "0"],
-                    ["kdenlive:collapsed", "0"],
-                    ["disable", "0"],
-                ])
-            })
+        if track_id[0] == 'V':
+            if self.scale_to_fill:
+                width = self._width
+                height = self._height
+                x = 0
+                y = 0
+                codec_width = chain.xpath('property[@name="meta.media.0.codec.width"]')
+                if codec_width:
+                    codec_height = chain.xpath('property[@name="meta.media.0.codec.height"]')
+                    clip_width = int(codec_width[0].text)
+                    clip_height = int(codec_height[0].text)
+                    if clip_width == width and clip_height > height:
+                        y = int((height - clip_height) / 2)
+                    elif clip_width/clip_height < width/height:
+                        target_height = int(clip_height/clip_width * width)
+                        y = int((height - target_height) / 2)
+                        height = target_height
+                        print("scale to fill %s %sx%s" % (path, width, height))
+                rect = "00:00:00.000=%s %s %s %s 1.000000" % (x, y, width, height)
+                filters_.append(
+                    self.get_element("filter", [
+                        ["mlt_service", "qtblend"],
+                        ["kdenlive_id", "qtblend"],
+                        ["rotate_center", "1"],
+                        ["rect", rect],
+                        ["rotation", "00:00:00.000=0"],
+                        ["compositing", "0"],
+                        ["distort", "0"],
+                        ["kdenlive:collapsed", "0"],
+                        ["disable", "0"],
+                    ])
+                )
 
         for ft in filters.items():
             filters_ += self.get_filter(*ft)