From 899dd03ac96920cada2898e479cff6ef4cc10c9f Mon Sep 17 00:00:00 2001
From: mjbudd77 <mjbudd77@gmail.com>
Date: Mon, 4 Oct 2021 19:54:01 -0400
Subject: [PATCH] Added code to AVI RIFF viewer to calculate/display video
 frame rate.

---
 src/drivers/Qt/AviRiffViewer.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/drivers/Qt/AviRiffViewer.cpp b/src/drivers/Qt/AviRiffViewer.cpp
index a84d7282..fa9c8440 100644
--- a/src/drivers/Qt/AviRiffViewer.cpp
+++ b/src/drivers/Qt/AviRiffViewer.cpp
@@ -668,6 +668,12 @@ int  AviRiffViewerDialog::processChunk( AviRiffTreeItem *item )
 		twi = new QTreeWidgetItem();
 		twi->setText( 0, tr("dwRate") );
 		twi->setText( 2, tr(stmp) );
+
+		if ( strcmp( strhType, "vids" ) == 0 )
+		{
+			sprintf( stmp, "(%13.10f Hz)", (double)data.readU32(32) / (double)data.readU32(28) );
+			twi->setText( 3, tr(stmp) );
+		}
 		item->addChild(twi);
 
 		sprintf( stmp, "%u", data.readU32(36) );