| 摘要 |
Video data is transcoded on the fly to produce a progressive download that may be viewed while the data is being received (streaming) and/or may be downloaded and played later. A locator (301) locates an input video data file on the Internet. An analyser (303) analyses a portion of the input video data file to determine coded characteristics of encoded input video. A generator (304) generates a file header for an output video data file that includes an indication of the size of the output video data file. An input interface (302) receives the input video data located by locator (301) and a transcoder (305) transcodes the input video data to produce encoded output video data. The output interface supplies the encoded output video data with the file header as a stream to a receiving device. In a first embodiment, the expected size of data in the header is over estimated and blank video chunks are added. In an alternative embodiment, the expected data size is under estimated and compression parameters are modified during the transcoding process. |
