【PR】如何处理视频在最后时声音逐渐变小
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实现步骤
- 把时间刻度放到背景出现的那一帧
- 然后点击声音轨道的关键帧
- 这个时候在把时间刻度拉到结尾，在点一个关键帧
- 然后点住最后一个关键帧的位置
- 一直往下拉即可
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