文章目录
- 一、前置操作 ( 移植 FFMPEG )
- 二、FFMPEG 混音命令
- 三、Android FFMPEG 混音源代码完整示例
- 四、博客源码
一、前置操作 ( 移植 FFMPEG )
参考 【Android FFMPEG 开发】Android 中执行 FFMPEG 指令 博客 ;
在应用的 build.gradle 构建脚本中导入如下依赖 ;
代码语言：javascript复制dependencies {
implementation 'com.writingminds:FFmpegAndroid:0.3.2'
}然后按照 【Android FFMPEG 开发】Android 中执行 FFMPEG 指令 二、Android 中执行 FFMPEG 指令 中的流程进行开发 , 将拼接好的 FFMPEG 指令传入 ffmpeg.execute 方法 ;
二、FFMPEG 混音命令
FFMPEG 混音命令 :
代码语言：javascript复制ffmpeg -i 输入文件1 -i 输入文件2 -i 输入文件3 -filter_complex amix=inputs=输入文件个数:duration=混音时间对齐策略:dropout_transition=声音渐弱时间 输出文件-i : 输入文件的完整绝对路径 ;
amix=inputs=2 : 表示混音文件个数 , 有
2 个文件进行混音 ;duration=longest : 设置混音时间对齐策略 , longest 表示最长的音频文件持续时间 , shortest 表示最短输入的持续时间 , first 表示第一个文件的持续时间 ;
dropout_transition=2 : 表示输入流结束时 , 音量从满音量到
0 音量渐弱
2 秒消失 ;
Android 中的完整命令 :
代码语言：javascript复制-i /data/user/0/com.example.ffmpeg_mix/files/BeardedGrain.mp3 -i /data/user/0/com.example.ffmpeg_mix/files/RainyDay.mp3 -filter_complex amix=inputs=2:duration=longest:dropout_transition=2 /data/user/0/com.example.ffmpeg_mix/files/Mix.mp3第
1 个输入文件是 /data/user/0/com.example.ffmpeg_mix/files/BeardedGrain.mp3 ;
第 2 个输入文件是 /data/user/0/com.example.ffmpeg_mix/files/RainyDay.mp3 ;
amix=inputs=2 表示当前有 2 个输入文件 ;
duration=longest 表示混音时间是最长输入持续时间 ;
dropout_transition=2 表示输入流结束时 , 音量从满音量到
0 音量渐弱 2 秒消失 ;
最后混音的输出文件是 /data/user/0/com.example.ffmpeg_mix/files/Mix.mp3 ;
命令分行注释 :
代码语言：javascript复制-i /data/user/0/com.example.ffmpeg_mix/files/BeardedGrain.mp3 // 输入文件 1
-i /data/user/0/com.example.ffmpeg_mix/files/RainyDay.mp3 // 输入文件 2
-filter_complex amix=inputs=2:duration=longest:dropout_transition=2 // 混音参数
/data/user/0/com.example.ffmpeg_mix/files/Mix.mp3 // 输出文件三、Android FFMPEG 混音源代码完整示例
Android FFMPEG 混音源代码完整示例 :
代码语言：javascript复制package com.example.ffmpeg_mix
import android.os.Bundle
import android.util.Log
import android.view.View
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity
import com.github.hiteshsondhi88.libffmpeg.ExecuteBinaryResponseHandler
import com.github.hiteshsondhi88.libffmpeg.FFmpeg
import com.github.hiteshsondhi88.libffmpeg.LoadBinaryResponseHandler
import java.io.File
class MainActivity : AppCompatActivity() {
val TAG = "MainActivity"
/**
* 应用内置存储下的 files 目录
*/
lateinit var mFilePath: String
lateinit var ffmpeg: FFmpeg
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
mFilePath = this.filesDir.toString()
// 初始化 FFMPEG
ffmpeg = FFmpeg.getInstance(this)
// 加载 FFMPEG 可执行文件
ffmpeg.loadBinary(LoadBinaryResponseHandler())
}
/**
* 拷贝文件
*/
fun copy(view: View) {
CommandUtils.copyAssets2File(
this,
"BeardedGrain.mp3",
"${mFilePath}/BeardedGrain.mp3")
CommandUtils.copyAssets2File(
this,
"RainyDay.mp3",
"${mFilePath}/RainyDay.mp3")
showText()
}
/**
* 执行混音命令
*/
fun mix(view: View) {
var cmd = "-i ${mFilePath}/BeardedGrain.mp3 -i ${mFilePath}/RainyDay.mp3 -filter_complex amix=inputs=2:duration=longest:dropout_transition=2 ${mFilePath}/Mix.mp3"
Log.i(TAG, "执行命令 : $cmd")
var cmdArraay = cmd.split(" ").toTypedArray();
ffmpeg.execute(cmdArraay, object : ExecuteBinaryResponseHandler(){
override fun onStart() {
super.onStart()
Log.i(TAG, "onStart")
}
override fun onFinish() {
super.onFinish()
Log.i(TAG, "onStart")
showText()
}
override fun onSuccess(message: String?) {
super.onSuccess(message)
Log.i(TAG, "onSuccess : $message")
}
override fun onProgress(message: String?) {
super.onProgress(message)
Log.i(TAG, "onProgress : $message")
}
override fun onFailure(message: String?) {
super.onFailure(message)
Log.i(TAG, "onFailure : $message")
}
})
}
/**
* 显示内置存储目录
*/
fun showText(){
var fileString = ""
var files = File(mFilePath).listFiles()
files.forEach {
fileString = "${it}n"
}
findViewById<TextView>(R.id.text).text = fileString
}
}执行结果 : 这是混音正确的输出内容 ;
代码语言：javascript复制执行命令 : -i /data/user/0/com.example.ffmpeg_mix/files/BeardedGrain.mp3 -i /data/user/0/com.example.ffmpeg_mix/files/Rain
onStart
onProgress : ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
onProgress : built with gcc 4.8 (GCC)
onProgress : configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-andro
onProgress : libavutil 55. 17.103 / 55. 17.103
onProgress : libavcodec 57. 24.102 / 57. 24.102
onProgress : libavformat 57. 25.100 / 57. 25.100
onProgress : libavdevice 57. 0.101 / 57. 0.101
onProgress : libavfilter 6. 31.100 / 6. 31.100
onProgress : libswscale 4. 0.100 / 4. 0.100
onProgress : libswresample 2. 0.101 / 2. 0.101
onProgress : libpostproc 54. 0.100 / 54. 0.100
onProgress : [mp3 @ 0xe8230000] Skipping 0 bytes of junk at 51635.
onProgress : [mjpeg @ 0xe80af400] Changing bps to 8
onProgress : Input #0, mp3, from '/data/user/0/com.example.ffmpeg_mix/files/BeardedGrain.mp3':
onProgress : Metadata:
onProgress : encoder : Lavf57.83.100
onProgress : album : 芒种
onProgress : title : 芒种
onProgress : artist : 步束
onProgress : disc : 01
onProgress : track : 1
onProgress : Duration: 00:03:35.48, start: 0.025056, bitrate: 321 kb/s
onProgress : Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 320 kb/s
onProgress : Metadata:
onProgress : encoder : Lavc57.10
onProgress : Stream #0:1: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 640x640 [SAR 72:72 DAR 1:1], 90k tb
onProgress : Metadata:
onProgress : comment : Media (e.g. label side of CD)
onProgress : [mp3 @ 0xe8230600] Skipping 0 bytes of junk at 18961.
onProgress : [mjpeg @ 0xe80b0400] Changing bps to 8
onProgress : Input #1, mp3, from '/data/user/0/com.example.ffmpeg_mix/files/RainyDay.mp3':
onProgress : Metadata:
onProgress : encoder : Lavf57.83.100
onProgress : Duration: 00:04:25.85, start: 0.025056, bitrate: 320 kb/s
onProgress : Stream #1:0: Audio: mp3, 44100 Hz, stereo, s16p, 320 kb/s
onProgress : Metadata:
onProgress : encoder : Lavc57.10
onProgress : Stream #1:1: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 640x640 [SAR 72:72 DAR 1:1], 90k tb
onProgress : Metadata:
onProgress : comment : Media (e.g. label side of CD)
onProgress : [swscaler @ 0xe7f21000] deprecated pixel format used, make sure you did set range correctly
onProgress : [swscaler @ 0xe7f21000] No accelerated colorspace conversion found from yuv420p to rgb24.
onProgress : [mp3 @ 0xe8230c00] Frame rate very high for a muxer not efficiently supporting it.
onProgress : Please consider specifying a lower framerate, a different muxer or -vsync 2
onProgress : Output #0, mp3, to '/data/user/0/com.example.ffmpeg_mix/files/Mix.mp3':
onProgress : Metadata:
onProgress : Stream #0:0: Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
onProgress : Metadata:
onProgress : encoder : Lavc57.24.102 libmp3lame
onProgress : Stream #0:1: Video: png, rgb24, 640x640 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tb
onProgress : Metadata:
onProgress : comment : Media (e.g. label side of CD)
onProgress : encoder : Lavc57.24.102 png
onProgress : Stream mapping:
onProgress : Stream #0:0 (mp3) -> amix:input0 (graph 0)
onProgress : Stream #1:0 (mp3) -> amix:input1 (graph 0)
onProgress : amix (graph 0) -> Stream #0:0 (libmp3lame)
onProgress : Stream #0:1 -> #0:1 (mjpeg (native) -> png (native))
onProgress : Press [q] to stop, [?] for help
onProgress : frame= 1 fps=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate= 870.5kbits/s speed=0.00213x
onProgress : frame= 1 fps=0.0 q=0.0 size= 0kB time=00:03:31.41 bitrate= 0.0kbits/s speed=3.25x
onProgress : frame= 1 fps=0.0 q=0.0 size= 0kB time=00:03:33.00 bitrate= 0.0kbits/s speed=3.25x
onProgress : frame= 1 fps=0.0 q=0.0 size= 0kB time=00:03:34.57 bitrate= 0.0kbits/s speed=3.25x
onProgress : Error while filtering: Out of memory
onProgress : frame= 1 fps=0.0 q=-0.0 Lsize= 3995kB time=00:03:35.45 bitrate= 151.9kbits/s speed=3.25x
onProgress : video:628kB audio:3367kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.008727%
onSuccess : ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.8 (GCC)
configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
libavutil 55. 17.103 / 55. 17.103
libavcodec 57. 24.102 / 57. 24.102
libavformat 57. 25.100 / 57. 25.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 31.100 / 6. 31.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
[mp3 @ 0xe8230000] Skipping 0 bytes of junk at 51635.
[mjpeg @ 0xe80af400] Changing bps to 8
Input #0, mp3, from '/data/user/0/com.example.ffmpeg_mix/files/BeardedGrain.mp3':
Metadata:
Duration: 00:03:35.48, start: 0.025056, bitrate: 321 kb/s
Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 320 kb/s
Metadata:
encoder : Lavc57.10
Stream #0:1: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 640x640 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Metadata:
comment : Media (e.g. label side of CD)
[mp3 @ 0xe8230600] Skipping 0 bytes of junk at 18961.
[mjpeg @ 0xe80b0400] Changing bps to 8
Input #1, mp3, from '/data/user/0/com.example.ffmpeg_mix/files/RainyDay.mp3':
Metadata:
encoder : Lavf57.83.100
Duration: 00:04:25.85, start: 0.025056, bitrate: 320 kb/s
Stream #1:0: Audio: mp3, 44100 Hz, stereo, s16p, 320 kb/s
Metadata:
encoder : Lavc57.10
Stream #1:1: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 640x640 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Metadata:
comment : Media (e.g. label side of CD)
[swscaler @ 0xe7f21000] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0xe7f21000] No accelerated colorspace conversion found from yuv420p to rgb24.
[mp3 @ 0xe8230c00] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '/data/user/0/com.example.ffmpeg_mix/files/Mix.mp3':
Metadata:
Stream #0:0: Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
Metadata:
encoder : Lavc57.24.102 libmp3lame
Stream #0:1: Video: png, rgb24, 640x640 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
Metadata:
comment : Media (e.g. label side of CD)
encoder : Lavc57.24.102 png
Stream mapping:
Stream #0:0 (mp3) -> amix:input0 (graph 0)
Stream #1:0 (mp3) -> amix:input1 (graph 0)
amix (graph 0) -> Stream #0:0 (libmp3lame)
Str
2021-06-03 20:16:57.824 30155-30155/com.example.ffmpeg_mix I/MainActivity: onStart文件内容 : ffmpeg 是可执行文件 , Mix.mp3 是由其余两个 mp3 文件混音而来的 ;
四、博客源码
博客源码 :
- GitHub : https://github.com/han1202012/FFMPEG_MIX
- CSDN : https://download.csdn.net/download/han1202012/19372874
