用户您好，请详细描述您所遇到的问题。
1.硬件获取渠道：公司购买
2.当前系统镜像版本：j5
3.当前天工开物版本：
4.问题定位：opencv把mat转换为yuv速度太慢，想用horizon_j5_open_explorer_v1.1.29_20221103/ddk/samples/ai_forward_view_sample/deps/aarch64/image_utils/include/image_utils.h中的HobotXStreamConvertImage这个函数把bgr图转换为yuv，但是总是转码失败
5.开发的demo/案例：
6.需要提供的解决方案：如何使用HobotXStreamConvertImage这个函数把bgr图转换为yuv，希望能给出案例
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