diff --git a/libavformat/avidec.c b/libavformat/avidec.c
index 91e8514b4b..621bd5f9fa 100644
--- a/libavformat/avidec.c
+++ b/libavformat/avidec.c
@@ -448,6 +448,7 @@ static int calculate_bitrate(AVFormatContext *s)
         int64_t len = 0;
         AVStream *st = s->streams[i];
         int64_t duration;
+        int64_t bitrate;
 
         for (j = 0; j < st->nb_index_entries; j++)
             len += st->index_entries[j].size;
@@ -455,7 +456,10 @@ static int calculate_bitrate(AVFormatContext *s)
         if (st->nb_index_entries < 2 || st->codec->bit_rate > 0)
             continue;
         duration = st->index_entries[j-1].timestamp - st->index_entries[0].timestamp;
-        st->codec->bit_rate = av_rescale(8*len, st->time_base.den, duration * st->time_base.num);
+        bitrate = av_rescale(8*len, st->time_base.den, duration * st->time_base.num);
+        if (bitrate <= INT_MAX && bitrate > 0) {
+            st->codec->bit_rate = bitrate;
+        }
     }
     return 1;
 }