From f731470c0f26390277bbccd4df517804d5a88ab5 Mon Sep 17 00:00:00 2001
From: Mike Solar <iam@mikesolar.cn>
Date: Wed, 3 Jun 2026 17:49:21 +0800
Subject: [PATCH] fix macOS timer bug

---
 app/widget/viewer/viewerplaybacktimer.cpp | 5 ++---
 app/widget/viewer/viewerplaybacktimer.h   | 3 ++-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/app/widget/viewer/viewerplaybacktimer.cpp b/app/widget/viewer/viewerplaybacktimer.cpp
index 9f807d66e..cbd143379 100644
--- a/app/widget/viewer/viewerplaybacktimer.cpp
+++ b/app/widget/viewer/viewerplaybacktimer.cpp
@@ -21,7 +21,6 @@
 
 #include "viewerplaybacktimer.h"
 
-#include <QDateTime>
 #include <QtMath>
 
 namespace olive
@@ -31,7 +30,7 @@ void ViewerPlaybackTimer::Start(const int64_t &start_timestamp,
 								const int &playback_speed,
 								const double &timebase)
 {
-	start_msec_ = QDateTime::currentMSecsSinceEpoch();
+	timer_.start();
 	start_timestamp_ = start_timestamp;
 	playback_speed_ = playback_speed;
 	timebase_ = timebase * 1000;
@@ -39,7 +38,7 @@ void ViewerPlaybackTimer::Start(const int64_t &start_timestamp,
 
 int64_t ViewerPlaybackTimer::GetTimestampNow() const
 {
-	int64_t real_time = QDateTime::currentMSecsSinceEpoch() - start_msec_;
+	int64_t real_time = timer_.elapsed();
 
 	int64_t frames_since_start =
 		qFloor(static_cast<double>(real_time) / (timebase_));
diff --git a/app/widget/viewer/viewerplaybacktimer.h b/app/widget/viewer/viewerplaybacktimer.h
index a9ed2f9b8..56f8e2594 100644
--- a/app/widget/viewer/viewerplaybacktimer.h
+++ b/app/widget/viewer/viewerplaybacktimer.h
@@ -23,6 +23,7 @@
 #define VIEWERPLAYBACKTIMER_H
 
 #include <QtGlobal>
+#include <QElapsedTimer>
 
 #include "common/define.h"
 
@@ -37,7 +38,7 @@ public:
 	int64_t GetTimestampNow() const;
 
 private:
-	qint64 start_msec_;
+	QElapsedTimer timer_;
 	int64_t start_timestamp_;
 
 	int playback_speed_;