diff --git a/libavformat/r3d.c b/libavformat/r3d.c
index 7aa0c5a2c3..edd80ab4fa 100644
--- a/libavformat/r3d.c
+++ b/libavformat/r3d.c
@@ -322,7 +322,8 @@ static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom)
 
     pkt->stream_index = 1;
     pkt->dts = dts;
-    if (st->codecpar->sample_rate)
+
+    if (st->codecpar->sample_rate && samples > 0)
         pkt->duration = av_rescale(samples, st->time_base.den, st->codecpar->sample_rate);
     av_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %"PRId64" samples %d sample rate %d\n",
             pkt->dts, pkt->duration, samples, st->codecpar->sample_rate);