diff --git a/workflow/video.py b/workflow/video.py
index 4aea26e..99e8066 100644
--- a/workflow/video.py
+++ b/workflow/video.py
@@ -237,8 +237,8 @@ def _common_ffmpeg_setting():
 
 def _common_ffmpeg_params():
     return (
+        "-vsync", "1", "-async", "1", "-avoid_negative_ts", "1",
         "-f", "mp4", "-b:v", VIDEO_BITRATE, "-c:a", "aac",
-        "-preset:v", "fast", "-profile:v", "main", "-avoid_negative_ts", "1",
         "-qmin", "18", "-qmax", "38", "-g:v", str(VIDEO_GOP),
         "-fflags", "+genpts", "-shortest"
     )