diff --git a/entity/ffmpeg.py b/entity/ffmpeg.py
index 796d20c..399e964 100644
--- a/entity/ffmpeg.py
+++ b/entity/ffmpeg.py
@@ -271,39 +271,33 @@ class FfmpegTask(object):
                     if param == '':
                         param = "1"
                     if param != "1":
-                        # 视频变速：使用minterpolate实现，避免PTS冲突
+                        # 视频变速：使用fps实现，避免PTS冲突
                         effect_index += 1
-                        speed_factor = 1.0 / float(param)  # 慢放倍数转换为速度因子
-                        filter_args.append(f"{video_output_str}minterpolate=fps=25*{speed_factor}:mi_mode=mci[v_eff{effect_index}]")
+                        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:"):
                     param = effect.split(":", 2)[1]
                     if param == '':
                         continue
                     _split = param.split(",")
-                    if len(_split) < 3:
+                    if len(_split) < 2:
                         continue
                     try:
                         start_time = float(_split[0])
                         zoom_factor = float(_split[1])
-                        duration = float(_split[2])
                         if start_time < 0:
                             start_time = 0
-                        if duration < 0:
-                            duration = 0
                         if zoom_factor <= 0:
                             zoom_factor = 1
                     except (ValueError, IndexError):
                         start_time = 0
-                        duration = 0
                         zoom_factor = 1
                     if zoom_factor == 1:
                         continue
                     effect_index += 1
                     
-                    # 获取缩放中心点（从pos_json或使用默认中心）
-                    center_x = "iw/2"
-                    center_y = "ih/2"
+                    left_x = f"iw/(2*{zoom_factor})"
+                    top_y = f"ih/(2*{zoom_factor})"
                     pos_json_str = self.ext_data.get('posJson', '{}')
                     try:
                         pos_json = json.loads(pos_json_str) if pos_json_str != '{}' else {}
@@ -319,23 +313,14 @@ class FfmpegTask(object):
                                 center_x_ratio = (_f_x + _f_x2) / (2 * _v_w)
                                 center_y_ratio = (_f_y + _f_y2) / (2 * _v_h)
                                 # 转换为视频坐标系统
-                                center_x = f"iw*{center_x_ratio:.6f}"
-                                center_y = f"ih*{center_y_ratio:.6f}"
+                                left_x = f"iw*({center_x_ratio:.6f}-1/(2*{zoom_factor}))"
+                                top_y = f"ih*({center_y_ratio:.6f}-1/(2*{zoom_factor}))"
                     except Exception as e:
                         # 解析失败使用默认中心
                         pass
                     
-                    if duration == 0:
-                        # 静态缩放（整个视频时长）
-                        x_expr = f"({center_x})-(ow*zoom)/2"
-                        y_expr = f"({center_y})-(oh*zoom)/2"
-                        filter_args.append(f"{video_output_str}trim=start={start_time},zoompan=z={zoom_factor}:x={x_expr}:y={y_expr}:d=1[v_eff{effect_index}]")
-                    else:
-                        # 动态缩放（指定时间段内）
-                        zoom_expr = f"if(between(t\\,{start_time}\\,{start_time + duration})\\,{zoom_factor}\\,1)"
-                        x_expr = f"({center_x})-(ow*zoom)/2"
-                        y_expr = f"({center_y})-(oh*zoom)/2"
-                        filter_args.append(f"{video_output_str}zoompan=z={zoom_expr}:x={x_expr}:y={y_expr}:d=1[v_eff{effect_index}]")
+                    # 静态缩放（整个视频时长）
+                    filter_args.append(f"{video_output_str}scale={zoom_factor}*iw:{zoom_factor}*ih,crop=iw/{zoom_factor}:ih/{zoom_factor}:{left_x}:{top_y}[v_eff{effect_index}]")
                     video_output_str = f"[v_eff{effect_index}]"
                 elif effect.startswith("skip:"):
                     param = effect.split(":", 2)[1]