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QT显示在fb0的透明怎么设置



在dm8168上可以单独运行播放显示视频,也可以单独运行显示QT程序(显示在fb0层)。先运行播放视频,再运行QT界面,但是QT一运行的时候fb0默认整个背景为绿色,把后面video层的视频盖住了,请问可以把fb0默认设置透明背景吗?