@@ -1913,6 +1913,24 @@ static int mov_write_string_metadata(AVFormatContext *s, AVIOContext *pb,

     return mov_write_string_tag(pb, name, t->value, lang, long_style);

 }

+/* iTunes bpm number */

+static int mov_write_tmpo_tag(AVIOContext *pb, AVFormatContext *s)

+{

+    AVDictionaryEntry *t = av_dict_get(s->metadata, "tmpo", NULL, 0);

+    int size = 0, tmpo = t ? atoi(t->value) : 0;

+    if (tmpo) {

+        size = 26;

+        avio_wb32(pb, size);

+        ffio_wfourcc(pb, "tmpo");

+        avio_wb32(pb, size-8); /* size */

+        ffio_wfourcc(pb, "data");

+        avio_wb32(pb, 0x15);  //type specifier

+        avio_wb32(pb, 0);

+        avio_wb16(pb, tmpo);        // data

+    }

+    return size;

+}

+

 /* iTunes track number */

 static int mov_write_trkn_tag(AVIOContext *pb, MOVMuxContext *mov,

                               AVFormatContext *s)

@@ -1960,6 +1978,7 @@ static int mov_write_ilst_tag(AVIOContext *pb, MOVMuxContext *mov,

     mov_write_string_metadata(s, pb, "tven",    "episode_id",1);

     mov_write_string_metadata(s, pb, "tvnn",    "network"  , 1);

     mov_write_trkn_tag(pb, mov, s);

+    mov_write_tmpo_tag(pb, s);

     return update_size(pb, pos);

 }