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8127 change substream resolution to CIF

Hi,

I am working with rdk 3.8.0 . and I wanna change substream resolution to CIF ,  how should I do?

I tried to modify Multich_tristream_fullfeature.c as below

/* Second stream */
pCameraOutPrm = &pCameraInstPrm->outParams[1];
pCameraOutPrm->dataFormat = SYSTEM_DF_YUV420SP_UV;
pCameraOutPrm->scEnable = FALSE;
pCameraOutPrm->scOutWidth = 320;
pCameraOutPrm->scOutHeight = 120;
pCameraOutPrm->standard = SYSTEM_STD_CIF;
pCameraOutPrm->outQueId = 1;

But the serial port print:

[m3video] 6658: ENCODE: All CH Create ... DONE !!!
[m3vpss ] SD displayInstId = 2
[m3vpss ] 6674: Assertion @ Line: 848 in links_m3vpss/display/displayLink_drv.c: status == FVID2_SOK : failed !!!
[m3video] ENCLINK:HEAPID:0 USED:29688
[m3video] 6661: ENCODE: Create ... DONE !!!

then the process crash...

Can anybody tell me how should I do ?