diff --git a/libavformat/demux.c b/libavformat/demux.c
index cba1f2e4df..d8ab29431e 100644
--- a/libavformat/demux.c
+++ b/libavformat/demux.c
@@ -2810,7 +2810,7 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
                     av_packet_unref(pkt1);
                 break;
             }
-            if (pkt->duration > 0) {
+            if (pkt->duration > 0 && pkt->duration < INT64_MAX - sti->info->codec_info_duration) {
                 const int fields = sti->codec_desc && (sti->codec_desc->props & AV_CODEC_PROP_FIELDS);
                 if (avctx->codec_type == AVMEDIA_TYPE_SUBTITLE && pkt->pts != AV_NOPTS_VALUE && st->start_time != AV_NOPTS_VALUE && pkt->pts >= st->start_time
                     && (uint64_t)pkt->pts - st->start_time < INT64_MAX