From a3846fe69bbd71341155c33ece14b0591264caa8 Mon Sep 17 00:00:00 2001
From: Moritz Barsnick <barsnick@gmx.net>
Date: Mon, 7 Oct 2019 00:19:28 +0200
Subject: avformat/mpjpegdec: fix finding multipart boundary parameter

The string matching function's return value was evaluated incorrectly.

Fixes trac #7920.

Signed-off-by: Moritz Barsnick <barsnick@gmx.net>
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavformat/mpjpegdec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/mpjpegdec.c b/libavformat/mpjpegdec.c
index 84130ab718..c0ffaf616e 100644
--- a/libavformat/mpjpegdec.c
+++ b/libavformat/mpjpegdec.c
@@ -267,7 +267,7 @@ static char* mpjpeg_get_boundary(AVIOContext* pb)
         while (av_isspace(*start))
             start++;
 
-        if (!av_stristart(start, "boundary=", &start)) {
+        if (av_stristart(start, "boundary=", &start)) {
             end = strchr(start, ';');
             if (end)
                 len = end - start - 1;
-- 
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