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2、使用習慣之後，然後選取要摳出的圖像。
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3、在使用遮罩生成，對細節進行調整壹下。
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4、然後切換到合成，就會發現已經對綠色背景進行了摳除。
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5、然後就可以添加自己想要的背景。
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6、如果在背景視頻裏面有雜物的話，就可以使用變換裏的裁剪，將這些雜物進行清除。
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