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8168采集字体模糊



场景是采集送到编码同时送一路给显示。   但是现在是采集笔记本的时候无论是显示还是编码出来的图形文字都很模糊、如果采集摄像头图像就很清晰,采集进来的信号有vga和hdmi,现象都一样,中间没有做缩放。有人知道怎么解决吗?