From 12a9f3fc09c7f0ded8be76d66542a88d293663cc Mon Sep 17 00:00:00 2001
From: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Date: Tue, 9 Mar 2021 21:29:24 +0100
Subject: [PATCH] avcodec/cbs_sei: Don't use -1th element of array

(This affected only suffix SEI messages; yet no such SEI messages are
currently inserted.)

Reviewed-by: Mark Thompson <sw@jkqxz.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
---
 libavcodec/cbs_sei.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/cbs_sei.c b/libavcodec/cbs_sei.c
index c49830ad77..2a96db9674 100644
--- a/libavcodec/cbs_sei.c
+++ b/libavcodec/cbs_sei.c
@@ -166,7 +166,7 @@ static int cbs_sei_get_unit(CodedBitstreamContext *ctx,
         }
         if (i < 0) {
             // No VCL units; just put it at the end.
-            position = -1;
+            position = au->nb_units;
         } else {
             position = i + 1;
         }