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C6accel中调用yuv422semi转yuv420p遇到问题



转换源buffer为src,目标buffer为dst
dst中Y部分和src的Y部分相同,但是U,V部分数据都是FF,没有拷贝进来,请教是什么原因导致的

函数调用如下,图像分辨率 1920*1080

retn = C6accel_IMG_ycbcr422sp_to_ycbcr420pl(hC6, src, src+srcDim.width * srcDim.height, dst,
dst+dstDim.width*dstDim.height*5/4,dst+dstDim.width*dstDim.height, 1080, 1920, 1920, 1920, 960);