void mltDeleteTransition(QString tag, int a_track, int b_track, GenTime in, GenTime out, QDomElement xml, bool refresh = true);
void mltUpdateTransition(QString oldTag, QString tag, int a_track, int b_track, GenTime in, GenTime out, QDomElement xml);
void mltUpdateTransitionParams(QString type, int a_track, int b_track, GenTime in, GenTime out, QDomElement xml);
void mltDeleteTransition(QString tag, int a_track, int b_track, GenTime in, GenTime out, QDomElement xml, bool refresh = true);
void mltUpdateTransition(QString oldTag, QString tag, int a_track, int b_track, GenTime in, GenTime out, QDomElement xml);
void mltUpdateTransitionParams(QString type, int a_track, int b_track, GenTime in, GenTime out, QDomElement xml);