jacky
问题补充说明：画面拍的不够完美，想把画面底下不是很完美的裁剪掉
1.首先打开电脑上的Pr,然后将需要裁剪视频画面大小的视频拖入软件的时间轴（也就是工作区）。
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2.在视频的预览页面顶部选择【效果】这个选项，展开视频既那少效果设置。
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3.在右侧展开的效果功能选项中，依次点击【视频效果】->【变换】->【裁剪】启用pr的裁剪工具。
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4.在左侧的调整面板根据个人需要设置视频画面需要裁剪的比例大小。
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5.在裁剪过程中，预览画面会实时根据设置进行变化，耐心对左侧的裁剪效果面板效果进行设置，直到画面效果达到自己的需求即可导出裁剪后的视频。
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