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TDA2PXEVM: Video Display problem due to Alg Plugin

Part Number: TDA2PXEVM

While creating Alg Plugin which take four input from VPE->Sync into composite buffer and gives composite buffer output to Dup. For NOT INPLACE mode four input and one output with no of channels set to one is working fine and video is displayed successfully. But for INPLACE mode changing no of channels to four and keeping other two same does not display video on screen.

Code Snippet:-

// Setup all queues
numInputQUsed = 4;
numOutputQUsed = 1;

/*
* Populating parameters corresponding to Q usage of Soil Detection
* algorithm link
*/
pInputQInfo[0].qMode = ALGORITHM_LINK_QUEUEMODE_NOTINPLACE;

pOutputQInfo[0].qMode = ALGORITHM_LINK_QUEUEMODE_INPLACE;

pOutputQInfo[0].queInfo.numCh = 4;

 

What should be the problem?