Digital Audio and Video Clip Encoding

摘要

An encoded clip generator comprises an input interface (402) for receiving source raw audio/video data from a media source (30). The source data comprises a series of complete video frames and a corresponding series of audio frames. The generator also includes an editor interface for receiving a clip start position and a clip end position. The generator includes a processor (410) and a memory (420) containing instructions for controlling the operation of the processor (410). Included in the memory (420) is a selection module (422) for generating a raw audio/video clip comprising video frames and audio frames selected from the source data according to the received clip start and end positions to provide an unextended raw audio/video clip; an extension module (424) for extending the unextended raw video clip by adding additional video frames and additional audio frames; an encoding module (426) for encoding the extended raw video clip to form an encoded extended video clip; and a trimming module (428) for removing excess video and audio frames from the encoded extended video clip such that all of the desired video frames are included and such that the duration of the encoded audio stream is at least as long as the duration of the encoded video stream remaining.