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dm368 如何做yuv叠加?

Other Parts Discussed in Thread: TVP5146

hw:dm368

v_in接口我们用模拟摄像头捕抓数据,然后交给tvp5146转为数字信号后给dm368,进行h264编码,最后通过v_out连接的液晶屏输出。

利用dvsdk-demos_4_02_00_01\dm365\encode中的程序可以运行,并在液晶屏中看到实时抓取图像,并保存为文件

命令是这样  root@dm365-evm:~#./encode -v my.264 -I 1 -y 2

。现在问题是想在图像右上角或者左下角显示一些时间等自定义信息,在它们的例子中该如何做?参考哪些资料 ,小弟头一次接触达芬奇请高手指点