From ad173e2c31ebfee647e6c406d417455f75ae2008 Mon Sep 17 00:00:00 2001
From: Martin Pulec <martin.pulec@cesnet.cz>
Date: Mon, 16 Oct 2023 16:15:12 +0200
Subject: [PATCH] DeckLink sync mode: preroll 4 frames

3 frames doesn't seem to be sufficient with DeckLink HD Extreme 3D+
when using compression (interestingly without it it seem to work with 3).
---
 src/video_display/decklink.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/video_display/decklink.cpp b/src/video_display/decklink.cpp
index e2ab8962d..4ea7397da 100644
--- a/src/video_display/decklink.cpp
+++ b/src/video_display/decklink.cpp
@@ -88,7 +88,7 @@
 
 enum {
         SCHED_RANGE              = 2,
-        DEFAULT_MIN_SCHED_FRAMES = 3,
+        DEFAULT_MIN_SCHED_FRAMES = 4,
         DEFAULT_MAX_SCHED_FRAMES = DEFAULT_MIN_SCHED_FRAMES + SCHED_RANGE,
         MAX_UNPROC_QUEUE_SIZE    = 10,
 };