ffmpeg 前 100 帧不显示图片水印，请问是什么情况？ - V2EX

ffmpeg 前 100 帧不显示图片水印，请问是什么情况？ - V2EX

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这是一个创建于 1978 天前的主题，其中的信息可能已经有所发展或是发生改变。

上命令：

ffmpeg-iinput.mp4-iwatermark.png-filter_complex"overlay=x='if(eq(mod(n\,100)\,0),100,x)':y='150'"-c:acopy-youtput.mp4

按理来说，如果为第 50 帧，那么 mod(50,\100) 余数应该为 50，eq(50,0)返回的应该是 0(false)，即：会执行 x = x，但是这里的 x 是什么呢？ NAN? 这个该怎么改？求大神~

1 条回复 2020-05-13 19:42:16 +08:00

1

wnpllrzodiac

2020-05-13 19:42:16 +08:00 via Android

有意思的题目

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