+static int mov_write_tfdt_tag(AVIOContext *pb, MOVTrack *track)
+{
+ int64_t pos = avio_tell(pb);
+
+ avio_wb32(pb, 0); /* size */
+ ffio_wfourcc(pb, "tfdt");
+ avio_w8(pb, 1); /* version */
+ avio_wb24(pb, 0);
+ avio_wb64(pb, track->frag_start);
+ return update_size(pb, pos);
+}
+