We have developed video inpainting, object tracking/extraction, motion analysis, and video depth computing technologies, due to the projects supported by NSC(97-2631-H-152-001-, 98-2631-H-008-002-, 99-2631-H-008-007-). Those technologies are combining into an integrated system. To continue our research in new technologies for digital content creation, we propose a 17-month project, which aims to develop several techniques for dealing with the dynamic background of videos, for the video viewpoint changing, and for the 3-D object construction. We will integrate these technologies and the results of the previous works into an automatic authoring tool. The authoring tool is very easy to use. It will help users to work conveniently. This project has several difficult challenges. We aim to contribute to the national project in producing automatic tools and publishing high-quality journal papers.