From a0a2ccd55d2038867b0677c31f70632a69f6e9e3 Mon Sep 17 00:00:00 2001
From: Tong Wu <tong1.wu-at-intel.com@ffmpeg.org>
Date: Thu, 24 Feb 2022 10:27:40 +0800
Subject: [PATCH] qsvenc: avoid dereferencing the null pointer

The variable AVFrame *frame could be a null pointer, now add a null
pointer check to avoid dereferencing the null pointer.

Signed-off-by: Tong Wu <tong1.wu@intel.com>
---
 libavcodec/qsvenc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/qsvenc.c b/libavcodec/qsvenc.c
index 49f61ae6bb..9b71487666 100644
--- a/libavcodec/qsvenc.c
+++ b/libavcodec/qsvenc.c
@@ -1736,7 +1736,7 @@ static int encode_frame(AVCodecContext *avctx, QSVEncContext *q,
         goto free;
     }
 
-    if (ret == MFX_WRN_INCOMPATIBLE_VIDEO_PARAM && frame->interlaced_frame)
+    if (ret == MFX_WRN_INCOMPATIBLE_VIDEO_PARAM && frame && frame->interlaced_frame)
         print_interlace_msg(avctx, q);
 
     ret = 0;