ffmpeg concat和同时缩放? [英] ffmpeg concat and scale simultaneously?

问题描述

我有两个 ffmpeg 命令:

ffmpeg -id:\ 1.mp4 -id:\ 1.mp4 -filter_complex"[0:0] [0:1] [1:0] [1:1] concat = n = 2:v = 1:a = 1 [v] [a]"-map" [v]"-map" [a]"d:\ 3.mp4

和

ffmpeg -i d:\ 1.mp4 -vf scale = 320:240 d:\ 3.mp4

如何同时使用它们?

推荐答案

ffmpeg -i d:\1.mp4 -i d:\2.mp4 -filter_complex "concat=n=2:v=1:a=1 [v] [a]; \
[v]scale=320:200[v2]" -map "[v2]" -map "[a]" d:\3.mp4

首先，我们将所有内容连接起来，并将结果传递给 [v] [a] (请参阅

Firstly we concatenate everything and pipe result to [v] [a] (see filtergraph syntax docs - its output from concat filter). Next we take [v], scale it and output to [v2], lastly we take [v2] and [a] and mux it to d:\3.mp4 file.

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