Contributing to the file size, in order of importance, are the parameters that set the video bit rate, audio sample frequency, audio bit rate, then frame size.

对文件大小的贡献，按重要性的顺序，依次是视频比特率、音频采样频率、音频比特率，然后是帧速。

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In the conventional image or video signal acquisition progress, we need to sample at a high rate first, and then compress the signal.

传统的图像或视频信息获取过程是先进行高速采样，然后再进行信号压缩。

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