From 05a2ce93265442285b2838530ba5bb5702cd18b1 Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Sun, 22 Sep 2019 19:24:17 +0200
Subject: avformat/y4m: do not try to seek if pts is less than 0

Fixes #8193.
---
 libavformat/yuv4mpegdec.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'libavformat/yuv4mpegdec.c')

diff --git a/libavformat/yuv4mpegdec.c b/libavformat/yuv4mpegdec.c
index fc2f0ca054..eceb945bb1 100644
--- a/libavformat/yuv4mpegdec.c
+++ b/libavformat/yuv4mpegdec.c
@@ -326,6 +326,8 @@ static int yuv4_read_seek(AVFormatContext *s, int stream_index,
 
     if (flags & AVSEEK_FLAG_BACKWARD)
         pts = FFMAX(0, pts - 1);
+    if (pts < 0)
+        return -1;
     pos = pts * s->packet_size;
 
     if (avio_seek(s->pb, pos + s->internal->data_offset, SEEK_SET) < 0)
-- 
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