From 5f48bdf0e7d337fa77e560098ba78f028e28d97b Mon Sep 17 00:00:00 2001
From: itsmattkc <itsmattkc@gmail.com>
Date: Tue, 18 Aug 2020 15:06:44 +1000
Subject: [PATCH] viewer: don't update the length until the operation is done

Prevents the frame/audio caches from being truncated unnecessarily during
an operation that ultimately doesn't change the length.
---
 app/node/output/viewer/viewer.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/app/node/output/viewer/viewer.cpp b/app/node/output/viewer/viewer.cpp
index 577c7d15d..169de22cc 100644
--- a/app/node/output/viewer/viewer.cpp
+++ b/app/node/output/viewer/viewer.cpp
@@ -200,6 +200,10 @@ void ViewerOutput::UpdateTrackCache()
 
 void ViewerOutput::VerifyLength()
 {
+  if (operation_stack_ != 0) {
+    return;
+  }
+
   NodeTraverser traverser;
 
   rational video_length;