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dm8168的osd的link问题



大家好,我是新手,我想在我的2路高清编码器中加dsp的osd算法,我link通道是

capture-》dei-》sclr-》nsf-》merge1-》dup-》swms-》display

                                                                   -》merge2-》ipcframesoutvpss-》process link-》ipcframesindsp-》dspalg

这是我的link过程,我运行代码没有报错,但是没有什么效果,望大神帮忙看看