void mltUpdateClip(ItemInfo info, QDomElement element, Mlt::Producer *prod);
void mltCutClip(int track, GenTime position);
void mltInsertSpace(QMap <int, int> trackClipStartList, QMap <int, int> trackTransitionStartList, int track, const GenTime duration, const GenTime timeOffset);
int mltGetSpaceLength(const GenTime pos, int track, bool fromBlankStart);
void mltUpdateClip(ItemInfo info, QDomElement element, Mlt::Producer *prod);
void mltCutClip(int track, GenTime position);
void mltInsertSpace(QMap <int, int> trackClipStartList, QMap <int, int> trackTransitionStartList, int track, const GenTime duration, const GenTime timeOffset);
int mltGetSpaceLength(const GenTime pos, int track, bool fromBlankStart);