private slots:
/** @brief Sets the new B track for the transition (automatic or forced). */
void slotTransitionTrackChanged();
/** @brief Pass position changes of the timeline cursor to the effects to keep their local timelines in sync. */
void slotRenderPos(int pos);
private slots:
/** @brief Sets the new B track for the transition (automatic or forced). */
void slotTransitionTrackChanged();
/** @brief Pass position changes of the timeline cursor to the effects to keep their local timelines in sync. */
void slotRenderPos(int pos);