MPEG-2 PS流实时无缝拼接技术的研究与实现

Research and Implementation of MPEG-2 PS Stream Seamless Splicing

主要是针对从视频采集卡中出来的两路实时MPEG-2 PS流进行了拼接研究及实现。在拼接过程中,通过正确选取拼接点、对系统参数如PTS,DTS等进行调整达到了视频流的连续播放效果,通过对视频帧的即时前向查找,避免了传统方法下通过等待查找可能造成的缓冲器下溢问题,并通过vbv delay参数的前后关联性,解决了缓冲器的上溢等问题,进而避免了拼接点处经常会出现的马赛克、花屏、黑屏及闪烁等问题。

This paper addresses from the two road real MPEG - 2 PS stream from the video capture cards of splicing research and implementation. Splicing in the process, by correctly selecting splicing point, the system parameters such as PTS, DTS,and other adjustments to the video broadcast continuous stream of results. Through the video frame immediately prior to the search for ways to avoid the traditional waiting for the next frame cased the possible buffer overflow,and through vbv_delay parameters before and after the association, the address of the buffer overflow problems thereby avoiding the splicing points often occur mosaic,Huaping blank screens and flicker,so as to achieve a better visual effect.