From e0a079be2aa34c2da826af9bc2f52b9206488a19 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Tue, 2 Jul 2024 01:47:33 +0200
Subject: [PATCH] doc/examples/vaapi_encode: Try to check fwrite() for failure

Fixes: CID1604548 Unused value

Sponsored-by: Sovereign Tech Fund
Reviewed-by: "Xiang, Haihao" <haihao.xiang-at-intel.com@ffmpeg.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 3e4bfff21192aed328c906c85424737128b108f1)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 doc/examples/vaapi_encode.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/doc/examples/vaapi_encode.c b/doc/examples/vaapi_encode.c
index d5f472f6dd..ff3ebb1e2b 100644
--- a/doc/examples/vaapi_encode.c
+++ b/doc/examples/vaapi_encode.c
@@ -88,6 +88,10 @@ static int encode_write(AVCodecContext *avctx, AVFrame *frame, FILE *fout)
         enc_pkt->stream_index = 0;
         ret = fwrite(enc_pkt->data, enc_pkt->size, 1, fout);
         av_packet_unref(enc_pkt);
+        if (ret != enc_pkt->size) {
+            ret = AVERROR(errno);
+            break;
+        }
     }
 
 end: