From 713b63bb495e200d0b79e1bf7e8caf0f80a2a110 Mon Sep 17 00:00:00 2001
From: "J.S.Patrick" <980141374@qq.com>
Date: Thu, 30 Jul 2026 15:12:03 +0800
Subject: [PATCH] =?UTF-8?q?perf:=20=E9=A2=84=E6=8A=93=E5=B8=A7=E6=9C=89?=
 =?UTF-8?q?=E6=95=88=E6=9C=9F=E6=94=BE=E5=AE=BD=E8=87=B3=202s?=
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将 SC_PRIMED_FRAME_TTL 从 500ms 调整为 2s，降低机器繁忙或选区流程启动较慢时预帧过期回退实时抓帧的概率，同时保留过期保护避免使用陈旧帧。
---
 src/screenshot_windows.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/screenshot_windows.cpp b/src/screenshot_windows.cpp
index 39012e3..a8d0639 100644
--- a/src/screenshot_windows.cpp
+++ b/src/screenshot_windows.cpp
@@ -51,7 +51,7 @@ static std::thread g_screenshotThread;
 // 由 startRegionCaptureWithPrimedFrame 的 options.autoConfirm 设置，
 // 会话开始时拷贝进 CaptureContext 供窗口过程读取。
 static std::atomic<bool> g_autoConfirm(false);
-static const auto SC_PRIMED_FRAME_TTL = std::chrono::milliseconds(500);
+static const auto SC_PRIMED_FRAME_TTL = std::chrono::seconds(2);
 
 struct PrimedScreenshotFrame {
     HBITMAP bitmap = NULL;