diff --git a/libavformat/dashenc.c b/libavformat/dashenc.c
index c7aea0ce1c..6b4ab8eeb9 100644
--- a/libavformat/dashenc.c
+++ b/libavformat/dashenc.c
@@ -706,7 +706,9 @@ static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_ind
         if (os->bit_rate > 0)
             snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"", os->bit_rate);
         else if (final) {
-            int average_bit_rate = os->pos * 8 * AV_TIME_BASE / c->total_duration;
+            int average_bit_rate = 0;
+            if (c->total_duration > 0)
+                average_bit_rate = os->pos * 8 * AV_TIME_BASE / c->total_duration;
             snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"", average_bit_rate);
         } else if (os->first_segment_bit_rate > 0)
             snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"", os->first_segment_bit_rate);