diff --git a/croppa/main.py b/croppa/main.py
index 5cd7720..a821793 100644
--- a/croppa/main.py
+++ b/croppa/main.py
@@ -2699,9 +2699,12 @@ class VideoEditor:
                 '-r', str(self.fps),
                 '-i', temp_file.name,
                 '-c:v', 'libx264',
-                '-preset', 'fast',
-                '-crf', '18',
+                '-preset', 'veryslow',
+                '-crf', '12',
                 '-pix_fmt', 'yuv420p',
+                '-profile:v', 'high',
+                '-level', '4.2',
+                '-x264-params', 'ref=5:bframes=8:deblock=1,1',
                 output_path
             ]
             self.temp_file_name = temp_file.name