| 摘要 |
<p>Disclosed is a mobile multimedia real-time transcoding playing system based on offline downloading. The system comprises a client, a task scheduling and managing server, an offline downloading and transcoding server cluster and a storage server. The client is adapted to submit an offline downloading and transcoding task request to the task scheduling and managing server. The offline downloading and transcoding task request comprises a target mobile device type selected by a user and a target format designated by the user and obtain a requested multimedia resource. The task scheduling and managing server is adapted to transmit an offline downloading and transcoding task request of a client, and schedule the distributed offline downloading and transcoding server cluster. The offline downloading and transcoding server cluster is distributed and is adapted to accept scheduling of the task scheduling and managing server, perform an offline downloading and transcoding task in a manner of performing offline downloading and transcoding in parallel according to a target mobile device type selected by the user or a target format designated by the user. The storage server is adapted to store a multimedia resource which is downloaded and transcoded by the offline downloading and transcoding server cluster. The offline downloading and transcoding server cluster is further adapted to report basic configuration information and load information of the offline downloading and transcoding server cluster to the task scheduling and managing server. The task scheduling and managing server is further adapted to allocate the offline scheduling and transcoding task to the offline downloading and transcoding server cluster according to the basic configuration information and the load information submitted by the offline downloading and transcoding server cluster. The multimedia resource comprises data slices. The offline downloading and transcoding server cluster is further adapted to receive an offset of a designated slice submitted by the client when the client needs to designate another slice which belongs to a same file with a current slice being played or previewed, perform the offline downloading and transcoding task from the designated slice according to the offset of the slice.</p> |
