但如果文件改变了，这可能无法起作用，如剪切覆盖内容。

But this may not work if the file is altered, such as by cropping or overlaying text.

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许多通常的多媒体信号处理，如剪切、滤波、感知编码等，引起了水印信号衰落状的偏倚。

Many common multimedia signal processing, including cropping, filtering, and perceptual coding, make watermark signal fading-like modification.

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可以通过直观的动作如“拖放”和“拖框选择”来组装和剪切视频文件。

The video files can then be assembled and cuted using intuitive actions as "drag and drop" and "rubberband selection".

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