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各位大佬请教下,vip捕捉设置subframe无效,请问除了修改以下参数还需要修改什么

我修改的参数

CaptureLink_drvInitCreateArgs函数中修改:
pOutInfo->subFrameModeEnable = TRUE;
pOutInfo->numLinesInSubFrame = 128;//5;//1080;//1920;
pOutInfo->subFrameCb = captureApp_subFrame_callback;

修改后在回调函数中打印发现不管Nline改为多少,打印始终是


[m3vpss ] DONE links_m3vpss/capture/captureLink_drv.c:captureApp_subFrame_callback:2065 numOutLines: 1744848908 !!!
[m3vpss ] DONE links_m3vpss/capture/captureLink_drv.c:captureApp_subFrame_callback:2066 numInLines: 9 !!!
[m3vpss ] DONE links_m3vpss/capture/captureLink_drv.c:captureApp_subFrame_callback:2067 subFrameNum: 0 !!

请问下大佬是否还需要修改其他的才能做到子帧输出?还需要修改的是哪几个参数?