FFmpeg learning (7) - add background music to the video

Sometimes your own recorded video courseware want to add a background music, methods of operation as follows:

Create a bat file 1.bat as follows:

@echo off
title 正在转换,mp4视频添加循环背景音乐
ffmpeg -i %1 -i E:\softs\ffmpeg-4.2.2-win64-static\bin\2.mp3 -filter_complex [1:a]aloop=loop=-1:size=2e+09[out];[out][0:a]amix -ss 0 -t 60 -y out.mp4
ping -n 5 127.0.0.1 >nul

Parameter Description:

ffmpeg 

//输入视频，最好选一个大于一分钟的尝试
-i %1

//输入背景音，最好短一点，方便测试是否循环
-i E:\softs\ffmpeg-4.2.2-win64-static\bin\2.mp3

-filter_complex 

//将背景音无限循环
[1:a]aloop=loop=-1:size=2e+09[out];

//将背景音和视频中的音频混合
[out][0:a]amix 

//裁剪总时长，裁剪到60秒
-ss 0 -t 60 

//输出
-y result.mp4