diff --git a/entity/ffmpeg.py b/entity/ffmpeg.py
index d296647..678573b 100644
--- a/entity/ffmpeg.py
+++ b/entity/ffmpeg.py
@@ -220,6 +220,15 @@ class FfmpegTask(object):
                     # filter_args.append(f"{_end_out_str}{_start_out_str}overlay=eof_action=pass{video_output_str}")
                     filter_args.append(f"{_start_out_str}{_mid_out_str}{_end_out_str}concat=n=3:v=1:a=0,setpts=N/{self.frame_rate}/TB{video_output_str}")
                     effect_index += 1
+                elif effect.startswith("ospeed:"):
+                    param = effect.split(":", 2)[1]
+                    if param == '':
+                        param = "1"
+                    if param != "1":
+                        # 视频变速
+                        effect_index += 1
+                        filter_args.append(f"{video_output_str}setpts={param}*PTS[v_eff{effect_index}]")
+                        video_output_str = f"[v_eff{effect_index}]"
                 elif effect.startswith("zoom:"):
                     ...
                 ...