@@ -157,8 +157,10 @@ static unsigned int get_aiff_header(AVFormatContext *s, int size,

     if (!codec->block_align)

         codec->block_align = (codec->bits_per_coded_sample * codec->channels) >> 3;

-    codec->bit_rate = codec->sample_rate * (codec->block_align << 3) /

-                      aiff->block_duration;

+    if (aiff->block_duration) {

+        codec->bit_rate = codec->sample_rate * (codec->block_align << 3) /

+                          aiff->block_duration;

+    }

     /* Chunk is over */

     if (size)