int m4af_add_itmf_int16_tag(m4af_writer_t *ctx, uint32_t type, int value);
-int m4af_add_itmf_int32_tag(m4af_writer_t *ctx, uint32_t type, int value);
+int m4af_add_itmf_int32_tag(m4af_writer_t *ctx, uint32_t type, uint32_t value);
+
+int m4af_add_itmf_int64_tag(m4af_writer_t *ctx, uint32_t type, uint64_t value);
int m4af_add_itmf_track_tag(m4af_writer_t *ctx, int track, int total);