| 摘要 |
<p>Systems and methods are described for modifying the hint track of a video file to smooth out the data transmission rates, thereby reducing bandwidth spikes during transmission. In one embodiment, this is accomplished by examining the size of each frame and using the frame rate to calculate per-frame bit rates. The transmission start times are then adjusted for each packet in order to spread out packet transmission times and (if necessary) lengthen frame transmission times. This reduces bandwidth peaks. In effect, every network packet is planned in advance, and a detailed description of what data should be sent at what point in time is stored in the hint tracks. Thus, the streaming server simply looks up the correct data send timing in a table, rather than performing calculations repeatedly at send time.</p> |
