diff --git a/libavformat/concatdec.c b/libavformat/concatdec.c
index 32d4a99010..788a541115 100644
--- a/libavformat/concatdec.c
+++ b/libavformat/concatdec.c
@@ -494,7 +494,9 @@ static int concat_read_header(AVFormatContext *avf)
         else
             time = cat->files[i].start_time;
         if (cat->files[i].user_duration == AV_NOPTS_VALUE) {
-            if (cat->files[i].inpoint == AV_NOPTS_VALUE || cat->files[i].outpoint == AV_NOPTS_VALUE)
+            if (cat->files[i].inpoint == AV_NOPTS_VALUE || cat->files[i].outpoint == AV_NOPTS_VALUE ||
+                cat->files[i].outpoint - (uint64_t)cat->files[i].inpoint != av_sat_sub64(cat->files[i].outpoint, cat->files[i].inpoint)
+            )
                 break;
             cat->files[i].user_duration = cat->files[i].outpoint - cat->files[i].inpoint;
         }