prevent empty video frame upon race

1 files changed, 1 insertions, 1 deletions

diff --git a/FTNoIR_Tracker_PT/pt_video_widget.cpp b/FTNoIR_Tracker_PT/pt_video_widget.cpp
index 38c49567..75fa18a0 100644
--- a/FTNoIR_Tracker_PT/pt_video_widget.cpp
+++ b/FTNoIR_Tracker_PT/pt_video_widget.cpp
@@ -21,7 +21,7 @@ void PTVideoWidget::update_image(const cv::Mat& frame)
     const int rate = 40;

     if (freshp)

         return;

-    if (!update_throttler.isValid() || update_throttler.elapsed() > rate)

+    if (frame.empty() || !update_throttler.isValid() || update_throttler.elapsed() > rate)

     {

         _frame = frame.clone();

         update_throttler.restart();