From ffa9cd15e4981079fe767b9b6f01200091eaf5fb Mon Sep 17 00:00:00 2001
From: Exeldro <exelsor@hotmail.com>
Date: Sat, 28 Aug 2021 08:02:30 +0200
Subject: [PATCH] UI: Fix crash when output source 0 is null

---
 UI/window-basic-main-transitions.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/UI/window-basic-main-transitions.cpp b/UI/window-basic-main-transitions.cpp
index 7dcdff2e6..e6d8e16a5 100644
--- a/UI/window-basic-main-transitions.cpp
+++ b/UI/window-basic-main-transitions.cpp
@@ -388,6 +388,11 @@ void OBSBasic::TransitionToScene(OBSSource source, bool force,
 	}
 
 	OBSSource transition = obs_get_output_source(0);
+	if (!transition) {
+		if (usingPreviewProgram && sceneDuplicationMode)
+			obs_scene_release(scene);
+		return;
+	}
 	obs_source_release(transition);
 
 	float t = obs_transition_get_time(transition);