From 311b09cc6363d28efff98c69e1bb686f1cfb32d6 Mon Sep 17 00:00:00 2001
From: ww-rm <ww-rm@qq.com>
Date: Thu, 24 Jul 2025 17:58:55 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8D=E8=87=AA=E5=AE=9A=E4=B9=89?=
 =?UTF-8?q?=E5=AF=BC=E5=87=BA=E9=97=AE=E9=A2=98?=
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---
 Spine/Exporters/CustomFFmpegExporter.cs | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/Spine/Exporters/CustomFFmpegExporter.cs b/Spine/Exporters/CustomFFmpegExporter.cs
index 174a70b..b1c5507 100644
--- a/Spine/Exporters/CustomFFmpegExporter.cs
+++ b/Spine/Exporters/CustomFFmpegExporter.cs
@@ -1,5 +1,6 @@
 using FFMpegCore;
 using FFMpegCore.Pipes;
+using SFML.Graphics;
 using SFML.System;
 using System;
 using System.Collections.Generic;
@@ -63,6 +64,22 @@ namespace Spine.Exporters
             else options.WithCustomArgument("-vf unpremultiply=inplace=1");
         }
 
+        /// <summary>
+        /// 获取的一帧, 结果是预乘的
+        /// </summary>
+        protected override SFMLImageVideoFrame GetFrame(SpineObject[] spines)
+        {
+            // BUG: 也许和 SFML 多线程或者 FFmpeg 调用有关, 当渲染线程也在运行的时候此处并行渲染会导致和 SFML 有关的内容都卡死
+            // 不知道为什么用 FFmpeg 必须临时创建 RenderTexture, 否则无法正常渲染, 会导致画面帧丢失
+            using var tex = new RenderTexture(_renderTexture.Size.X, _renderTexture.Size.Y);
+            using var view = _renderTexture.GetView();
+            tex.SetView(view);
+            tex.Clear(_backgroundColorPma);
+            foreach (var sp in spines.Reverse()) tex.Draw(sp);
+            tex.Display();
+            return new(tex.Texture.CopyToImage());
+        }
+
         public override void Export(string output, CancellationToken ct, params SpineObject[] spines)
         {
             var videoFramesSource = new RawVideoPipeSource(GetFrames(spines, output, ct)) { FrameRate = _fps };