extern mlt_filter filter_dynamictext_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg );
extern mlt_filter filter_loudness_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg );
extern mlt_filter filter_invert_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg );
extern mlt_filter filter_dynamictext_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg );
extern mlt_filter filter_loudness_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg );
extern mlt_filter filter_invert_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg );