用ffmpeg怎么把25个小视频组合成一个大视频？

Question

用ffmpeg怎么把25个小视频组合成一个大视频？
每个小视频90X160px，没有声音，只有视频
5行5列
一共25个

以下代码来自网络，但是行不通，小视频没有声音，只有画面

@echo off
set dirname=D:\短视频\shortvideos_small\
ffmpeg -i %dirname%1.mp4 -i %dirname%2.mp4 -i %dirname%3.mp4 -i %dirname%4.mp4 -i %dirname%5.mp4 -i %dirname%6.mp4 -i %dirname%7.mp4 -i %dirname%8.mp4 -i %dirname%9.mp4 -i %dirname%10.mp4 -i %dirname%11.mp4 -i %dirname%12.mp4 -i %dirname%13.mp4 -i %dirname%14.mp4 -i %dirname%15.mp4 -i %dirname%16.mp4 -i %dirname%17.mp4 -i %dirname%18.mp4 -i %dirname%19.mp4 -i %dirname%20.mp4 -i %dirname%21.mp4 -i %dirname%22.mp4 -i %dirname%23.mp4 -i %dirname%24.mp4 -i %dirname%25.mp4 -filter_complex "[0:v]scale=iw/5:-1[v0];[1:v]scale=iw/5:-1[v1];[2:v]scale=iw/5:-1[v2];[3:v]scale=iw/5:-1[v3];[4:v]scale=iw/5:-1[v4];[5:v]scale=iw/5:-1[v5];[6:v]scale=iw/5:-1[v6];[7:v]scale=iw/5:-1[v7];[8:v]scale=iw/5:-1[v8];[9:v]scale=iw/5:-1[v9];[10:v]scale=iw/5:-1[v10];[11:v]scale=iw/5:-1[v11];[12:v]scale=iw/5:-1[v12];[13:v]scale=iw/5:-1[v13];[14:v]scale=iw/5:-1[v14];[15:v]scale=iw/5:-1[v15];[16:v]scale=iw/5:-1[v16];[17:v]scale=iw/5:-1[v17];[18:v]scale=iw/5:-1[v18];[19:v]scale=iw/5:-1[v19];[20:v]scale=iw/5:-1[v20];[21:v]scale=iw/5:-1[v21];[22:v]scale=iw/5:-1[v22];[23:v]scale=iw/5:-1[v23];[24:v]scale=iw/5:-1[v24];[v0][v1][v2][v3][v4][v5][v6][v7][v8][v9][v10][v11][v12][v13][v14][v15][v16][v17][v18][v19][v20][v21][v22][v23][v24]xstack=inputs=25:layout=0_0|0_h0|0_h0+h1|0_h0+h1+h2|0_h0+h1+h2+h3|w0_0|w0_h0|w0_h0+h1|w0_h0+h1+h2|w0_h0+h1+h2+h3|w0+w4_0|w0+w4_h0|w0+w4_h0+h1|w0+w4_h0+h1+h2|w0+w4_h0+h1+h2+h3|w0+w4+w8_0|w0+w4+w8_h0|w0+w4+w8_h0+h1|w0+w4+w8_h0+h1+h2|w0+w4+w8_h0+h1+h2+h3|w0+w4+w8+w12_0|w0+w4+w8+w12_h0|w0+w4+w8+w12_h0+h1|w0+w4+w8+w12_h0+h1+h2|w0+w4+w8+w12_h0+h1+h2+h3;[0:a][1:a][2:a][3:a][4:a][5:a][6:a][7:a][8:a][9:a][10:a][11:a][12:a][13:a][14:a][15:a][16:a][17:a][18:a][19:a][20:a][21:a][22:a][23:a][24:a]amix=inputs=25" D:\短视频\output.mp4

Answer 1

新建一个filelist.txt:

file '1.mp4'
file '2.mp4'
file '3.mp4'
...
file '25.mp4'

用这个 FFmpeg 命令：

ffmpeg -i input1.mp4 -i input2.mp4 -i input3.mp4 -i input4.mp4 -i input5.mp4 -i input6.mp4 -i input7.mp4 -i input8.mp4 -i input9.mp4 -i input10.mp4 -i input11.mp4 -i input12.mp4 -i input13.mp4 -i input14.mp4 -i input15.mp4 -i input16.mp4 -i input17.mp4 -i input18.mp4 -i input19.mp4 -i input20.mp4 -i input21.mp4 -i input22.mp4 -i input23.mp4 -i input24.mp4 -i input25.mp4 -filter_complex "[0:v][1:v][2:v][3:v][4:v][5:v][6:v][7:v][8:v][9:v][10:v][11:v][12:v][13:v][14:v][15:v][16:v][17:v][18:v][19:v][20:v][21:v][22:v][23:v][24:v]xstack=inputs=25:layout=0_0|w0_0|w0+w1_0|w0+w1+w2_0|w0+w1+w2+w3_0|0_h0|w0_h0|w0+w1_h0|w0+w1+w2_h0|w0+w1+w2+w3_h0|0_h0+h5|w0_h0+h5|w0+w1_h0+h5|w0+w1+w2_h0+h5|w0+w1+w2+w3_h0+h5|0_h0+h5+h10|w0_h0+h5+h10|w0+w1_h0+h5+h10|w0+w1+w2_h0+h5+h10|w0+w1+w2+w3_h0+h5+h10|0_h0+h5+h10+h15|w0_h0+h5+h10+h15|w0+w1_h0+h5+h10+h15|w0+w1+w2_h0+h5+h10+h15|w0+w1+w2+w3_h0+h5+h10+h15[v]" -map "[v]" output.mp4

Answer 2

我的脚本就有这样的功能，你可以研究下: https://github.com/abcfy2/simple_video_compress_build

---

./convert.sh -j --videocopy --audiocopy *.mp4

搞定