From cf43f6379ee01d86df135d486607e4cd2cb11c49 Mon Sep 17 00:00:00 2001
From: Jerry Yan <792602257@qq.com>
Date: Fri, 12 Sep 2025 16:50:53 +0800
Subject: [PATCH] =?UTF-8?q?feat(ffmpeg):=20=E4=BD=BF=E7=94=A8=20minterpola?=
 =?UTF-8?q?te=20=E6=9B=BF=E4=BB=A3=20fps=20=E8=B0=83=E6=95=B4=E8=A7=86?=
 =?UTF-8?q?=E9=A2=91=E9=80=9F=E5=BA=A6?=
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- 将视频变速功能从直接调整帧率改为使用 minterpolate 滤镜- 通过设置 fps 和 mi_mode 参数实现平滑的视频慢放效果
- 解决了直接调整帧率可能导致的 PTS 冲突问题
---
 entity/ffmpeg.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/entity/ffmpeg.py b/entity/ffmpeg.py
index 7471be4..796d20c 100644
--- a/entity/ffmpeg.py
+++ b/entity/ffmpeg.py
@@ -271,10 +271,10 @@ class FfmpegTask(object):
                     if param == '':
                         param = "1"
                     if param != "1":
-                        # 视频变速：通过改变帧率实现，避免PTS冲突
+                        # 视频变速：使用minterpolate实现，避免PTS冲突
                         effect_index += 1
-                        new_fps = self.frame_rate / float(param)
-                        filter_args.append(f"{video_output_str}fps={new_fps}[v_eff{effect_index}]")
+                        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}]")
                         video_output_str = f"[v_eff{effect_index}]"
                 elif effect.startswith("zoom:"):
                     param = effect.split(":", 2)[1]