From d7cb2ea2100e3c4f63f563ce7a8855b236cac06e Mon Sep 17 00:00:00 2001
From: Alexander Alekhin <alexander.a.alekhin@gmail.com>
Date: Thu, 1 Apr 2021 11:28:41 +0000
Subject: [PATCH] videoio(dshow): add NULL ptr check

---
 modules/videoio/src/cap_dshow.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/modules/videoio/src/cap_dshow.cpp b/modules/videoio/src/cap_dshow.cpp
index e29cf38341..cf653f61a7 100644
--- a/modules/videoio/src/cap_dshow.cpp
+++ b/modules/videoio/src/cap_dshow.cpp
@@ -2731,6 +2731,7 @@ int videoInput::start(int deviceID, videoDevice *VD){
     }
 
     VIDEOINFOHEADER *pVih =  reinterpret_cast<VIDEOINFOHEADER*>(VD->pAmMediaType->pbFormat);
+    CV_Assert(pVih);
     int currentWidth    =  HEADER(pVih)->biWidth;
     int currentHeight    =  HEADER(pVih)->biHeight;