用ffmpeg合并音频文件

时间:2023-03-08 16:01:40

1 问题描述

打电话的对话,被拆分成了两个PCM文件。其中主叫的录音文件A.pcm,被叫的录音为B.pcm。

问题是怎么合成一个混音的对话文件AB.wav。

2 WAV文件的录音格式

常见的声音文件主要有两种,分别对应于单声道(11.025KHz 采样率、8Bit 的采样值)和双声道(44.1KHz 采样率、16Bit 的采样值)。
采样率是指:声音信号在“模→数”转换过程中单位时间内采样的次数。采样值是指每一次采样周期 。
WAVE 文件数据块包含以脉冲编码调制(PCM)格式表示的样本。WAVE 文件是由样本组织而成的。在单声道 WAVE 文件中,声道0代表左声道,声道1代表右声道。
在多声道WAVE文件中,样本是交替出现的。

下面我们具体地分析 WAV文件的格式

endian field name Size 说明 计算方式
big ChunkID 4 文件头标识,一般就是" RIFF" 四个字母 ASCII 码表示的“RIFF”。(0x52494646)
little ChunkSize 4 整个数据文件的大小,不包括上面ID和Size本身 36+SubChunk2Size,或是4 + ( 8 + SubChunk1Size ) + ( 8 + SubChunk2Size ),这是整个数据块的大小(不包括ChunkID和ChunkSize的大小)
big Format 4 一般就是" WAVE" 四个字母 ASCII 码表示的“WAVE”。(0x57415645)
big SubChunk1ID 4 格式说明块,本字段一般就是"fmt " 新的数据块(格式信息说明块)ASCII 码表示的“fmt ”——最后是一个空格。(0x666d7420)
little SubChunk1Size 4 本数据块的大小,不包括ID和Size字段本身 本块数据的大小(对于PCM,值为16)。
little AudioFormat 2 音频的格式说明 PCM = 1 (比如,线性采样),如果是其它值的话,则可能是一些压缩形式
little NumChannels 2 声道数 1 => 单声道  |  2 => 双声道
little SampleRate 4 采样率 采样率,如 8000,44100 等值
little ByteRate 4 比特率,每秒所需要的字节数 等于: SampleRate * numChannels * BitsPerSample / 8
little BlockAlign 2 数据块对齐单元 等于:NumChannels * BitsPerSample / 8
little BitsPerSample 2 采样时模数转换的分辨率 采样分辨率,也就是每个样本用几位来表示,一般是 8bits 或是 16bits
big SubChunk2ID 4 真正的声音数据块,本字段一般是"data" 新数据块,真正的声音数据。ASCII 码表示的“data “(0x64617461) 
little SubChunk2Size 4 本数据块的大小,不包括ID和Size字段本身 数据大小,即,其后跟着的采样数据的大小。
little Data N 音频的采样数据 真正的声音数据

3 查看录音的PCM文件

1 查看录音的二进制文件
2 给出合成的思路。头文件的字节数
3 JAVA源码
4 安装ffmpeg
pcm转立体声mp3
ffmpeg -i input1.pcm -i input2.pcm -filter_complex "amovie=input1.pcm [l]; amovie=input2.pcm [r]; [l] [r] amerge" output.mp3 amr转混音amr
ffmpeg -i input1.amr -i input2.amr -filter_complex amix=inputs=:duration=longest -ab .2k -ar -ac output.amr 在后面加上 -loglevel quiet -y, 可以覆盖输出文件,避免输出日志 如: ffmpeg -i input1.amr -i input2.amr -filter_complex amix=inputs=:duration=longest -ab .2k -ar -ac output.amr -loglevel quiet -y

在做的过程中,渐渐发现这一切早有工具实现。下面来看看ffmpeg工具。

4 ffmpeg的安装

ffmpeg 安装步骤

########################################################################################

root 用户下安装下列依赖软件

  下载 ffmpeg
wget http://ffmpeg.org/releases/ffmpeg-3.1.2.tar.bz2 下载mp3依赖库libmp3lame
wget http://downloads.sourceforge.net/lame/lame-3.99.5.tar.gz 安装libmp3lame
tar -zxvf lame-3.99..tar.gz
./configure
make
make install 安装yasm
yum install yasm 安装Xext
yum install libXext-devel 安装amr的依赖库opencore-amr
wget --no-check-certificate https://sourceforge.net/projects/opencore-amr/files/opencore-amr/opencore-amr-0.1.3.tar.gz/download
./configure
make
make install 安装ffmpeg-3.1..tar.bz2
tar -jxvf ffmpeg-3.1..tar.bz2 ./configure --enable-shared --enable-nonfree --enable-gpl --enable-decoder=aac --enable-demuxer=mov --enable-x11grab --enable-zlib --enable-protocol=http --enable-filter=aformat --enable-filter=volume --enable-filter=aresample --enable-version3 --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb -----------
configue 一定要没有错误,如果有错误,按照提示安装相应的依赖软件 make
make install
######################################################################################## 安装好后输入ffmpeg 查看 如果报错ffmpeg: error while loading shared libraries: libavdevice.so.: cannot open shared object file: No
root 下输入命令
ldconfig 如果得到
ffmpeg version 3.1. Copyright (c) - the FFmpeg developers
built with gcc 4.4. (GCC) (Red Hat 4.4.-)
configuration: --enable-shared --enable-nonfree --enable-gpl --enable-decoder=aac --enable-demuxer=mov --enable-x11grab --enable-zlib --enable-protocol=http --enable-filter=aformat --enable-filter=volume --enable-filter=aresample --enable-version3 --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb
libavutil . 28.100 / . 28.100
libavcodec . 48.101 / . 48.101
libavformat . 41.100 / . 41.100
libavdevice . 0.101 / . 0.101
libavfilter . 47.100 / . 47.100
libswscale . 1.100 / . 1.100
libswresample . 1.100 / . 1.100
libpostproc . 0.100 / . 0.100
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}... Use -h to get full help or, even better, run 'man ffmpeg' 则安装成功

ffmpeg安装步骤

5 测试效果

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" alt="" />

5.1  1.amr 和 2.amr 是左右声道的录音,现在合成混音1_2.amr

ffmpeg -i .amr -i .amr -filter_complex amix=inputs=:duration=longest:dropout_transition=  -ab .2k -ar  -ac  1_2.amr

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" alt="" />

5.2  1.wav 和 2.wav是左右声道的录音,现在合成立体声1_2.mp3,即左声道是1的声音,右声道是2的声音。

ffmpeg -i .wav -i .wav -filter_complex "amovie=1.wav [l]; amovie=2.wav [r]; [l] [r] amerge"  1_2.mp3

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" alt="" />

双声道的pcm转换为单声道的amr,指定编解码器

ffmpeg -y -f s16le -ar  -ac  -i .pcm -acodec amr_nb -ab .2k -ar  -ac  .amr

http://blog.****.net/xianglingchuan/article/details/54092584

参考资料

1 ffmpeg常用转换命令,支持WAV转AMR   http://www.cnblogs.com/xiaofengfeng/p/3573025.html

2 WAVE 文件格式分析   http://www.cnblogs.com/liyiwen/archive/2010/04/19/1715715.html

3 How to compile FFmpeg on CentOS, Fedora or RHEL http://ask.xmodulo.com/compile-ffmpeg-centos-fedora-rhel.html

4 Linux下ffmpeg的完整安装 http://www.cnblogs.com/wanghetao/p/3386311.html

5 linux系统中ffmpeg安装配置步骤 http://www.111cn.net/sys/linux/82964.htm

6 error while loading shared libraries https://forum.ivorde.com/ffmpeg-error-while-loading-shared-libraries-libavdevice-so-52-cannot-open-shared-object-file-no-t129.html

7 FFmpeg Filters Documentation  http://ffmpeg.org/ffmpeg-filters.html

8 ffmpeg的中文文档  https://wanglongqi.github.io/tools/2014/12/23/ffmpegdoc/

9 How to change ffmpeg -threads settings  http://superuser.com/questions/792525/how-to-change-ffmpeg-threads-settings