视频流的动态帧率控制

S. Pejhan, Tihao Chiang, Ya-Qin Zhang
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引用次数: 16

摘要

描述了一种动态改变预编码视频剪辑帧率的机制。离线编码器以30 fps的速度创建高质量的比特流编码,以及以较低帧率为同一剪辑包含运动矢量的单独文件。在线编码器解码比特流(如果需要),并使用预先计算存储的运动信息以较低的帧率实时重新编码。动态帧率控制,与动态比特率控制一起使用,允许客户端解决可用带宽和预编码比特流比特率之间的速率不匹配。它还提供了一种在不增加带宽消耗的情况下实现视频流的快进控制的方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dynamic frame rate control for video streams
A mechanism for dynamically varying the frame rate of pre-encoded video clips is described. An off-line encoder creates a high quality bitstream encoded at 30 fps, as well as separate files containing motion vectors for the same clip at lower frame rates. An on-line encoder decodes the bitstream (if necessary) and re-encodes it at lower frame-rates in real-time using the pre-computed, stored motion information. Dynamic Frame Rate Control, used in conjunction with dynamic bit-rate control, allows clients to solve the rate mismatch between the bandwidth available to them and the bit-rate of the pre-encoded bitsream. It also provides a means for implementing Fast Forward control for video streaming without increasing bandwidth consumption.
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