m_document->setTrackEffect(m_document->tracksCount() - track - 1, newPos, before);
m_document->renderer()->mltMoveEffect(m_document->tracksCount() - track, pos, oldPos, newPos);
emit showTrackEffects(m_document->tracksCount() - track, m_document->trackInfoAt(m_document->tracksCount() - track - 1));
m_document->setTrackEffect(m_document->tracksCount() - track - 1, newPos, before);
m_document->renderer()->mltMoveEffect(m_document->tracksCount() - track, pos, oldPos, newPos);
emit showTrackEffects(m_document->tracksCount() - track, m_document->trackInfoAt(m_document->tracksCount() - track - 1));