使用FFMPEG在Android中合并两个音频文件
使用FFMPEG在Android中合并两个音频文件
提问于 2016-04-07 03:29:15
我正在开发一个应用程序，它接收两个音频文件，并将它们合并到受人尊敬的通道中。它们被均衡的方式并不像我希望的那样好，所以我想在混合阶段调整每个文件的音量。我在网上看到过几个例子，比如this、this和[this][3]。但他们都不为我工作。有人能用这个给我指引正确的方向吗？非常感谢！
我使用这个库来执行：https://github.com/WritingMinds/ffmpeg-android-java
这是我的代码(编辑)
String files = "-i " + mVoiceFile.getAbsolutePath() + " -i " + mBeatFile.getAbsolutePath();
String filter = "-filter_complex [0:a]volume=0.99[a1];[1:a]volume=0.3[a2][a1][a2]amerge=inputs=2,volume=1.3,pan=stereo|c0<c0+c2|c1<c1+c3[aout]";
String output = " -map [aout] -strict -2 \" + mRapFile.getAbsolutePath()";
String cmd = files+filter+output;`在此处输入代码
下面是我在运行时出现的错误。
04-06 12:17:34.079 30975-30975/me.rapchat.rapchat E/Studio Process: WARNING: linker: /data/user/0/me.rapchat.rapchat/files/ffmpeg has text relocations. This is wasting memory and prevents security hardening. Please fix.
04-06 12:17:34.306 30975-30975/me.rapchat.rapchat E/Studio Process: ffmpeg version n2.4.2 Copyright (c) 2000-2014 the FFmpeg developers
04-06 12:17:34.306 30975-30975/me.rapchat.rapchat E/Studio Process: built on Oct 7 2014 15:08:46 with gcc 4.8 (GCC)
04-06 12:17:34.306 30975-30975/me.rapchat.rapchat E/Studio Process: configuration: --target-os=linux --cross-prefix=/home/sb/Source-Code/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/sb/Source-Code/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --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/sb/Source-Code/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/sb/Source-Code/ffmpeg-android/build/armeabi-v7a-neon --extra-cflags='-I/home/sb/Source-Code/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -mfpu=neon' --extra-ldflags='-L/home/sb/Source-Code/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
04-06 12:17:34.307 30975-30975/me.rapchat.rapchat E/Studio Process: libavutil 54. 7.100 / 54. 7.100
04-06 12:17:34.307 30975-30975/me.rapchat.rapchat E/Studio Process: libavcodec 56. 1.100 / 56. 1.100
04-06 12:17:34.307 30975-30975/me.rapchat.rapchat E/Studio Process: libavformat 56. 4.101 / 56. 4.101
04-06 12:17:34.307 30975-30975/me.rapchat.rapchat E/Studio Process: libavdevice 56. 0.100 / 56. 0.100
04-06 12:17:34.308 30975-30975/me.rapchat.rapchat E/Studio Process: libavfilter 5. 1.100 / 5. 1.100
04-06 12:17:34.308 30975-30975/me.rapchat.rapchat E/Studio Process: libswscale 3. 0.100 / 3. 0.100
04-06 12:17:34.308 30975-30975/me.rapchat.rapchat E/Studio Process: libswresample 1. 1.100 / 1. 1.100
04-06 12:17:34.308 30975-30975/me.rapchat.rapchat E/Studio Process: libpostproc 53. 0.100 / 53. 0.100
04-06 12:17:34.372 30975-30975/me.rapchat.rapchat E/Studio Process: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/data/user/0/me.rapchat.rapchat/cache/recording.m4a':
04-06 12:17:34.373 30975-30975/me.rapchat.rapchat E/Studio Process: Metadata:
04-06 12:17:34.373 30975-30975/me.rapchat.rapchat E/Studio Process: major_brand : mp42
04-06 12:17:34.373 30975-30975/me.rapchat.rapchat E/Studio Process: minor_version : 0
04-06 12:17:34.374 30975-30975/me.rapchat.rapchat E/Studio Process: compatible_brands: isommp42
04-06 12:17:34.374 30975-30975/me.rapchat.rapchat E/Studio Process: creation_time : 2016-04-06 19:17:33
04-06 12:17:34.374 30975-30975/me.rapchat.rapchat E/Studio Process: Duration: 00:00:01.56, start: 0.000000, bitrate: 144 kb/s
04-06 12:17:34.375 30975-30975/me.rapchat.rapchat E/Studio Process: Stream #0:0(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 128 kb/s (default)
04-06 12:17:34.375 30975-30975/me.rapchat.rapchat E/Studio Process: Metadata:
04-06 12:17:34.375 30975-30975/me.rapchat.rapchat E/Studio Process: creation_time : 2016-04-06 19:17:33
04-06 12:17:34.375 30975-30975/me.rapchat.rapchat E/Studio Process: handler_name : SoundHandle
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/data/user/0/me.rapchat.rapchat/cache/beats/d3c37d60-ed50-4c00-b454-4e399a7858ff.m4a':
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: Metadata:
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: major_brand : mp42
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: minor_version : 0
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: compatible_brands: mp42isom
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: creation_time : 1993-11-24 14:46:42
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: encoder : Max 0.9.1
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: iTunSMPB : 00000000 00000840 000003c0 000000000035dc00 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: date : 2015
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: Duration: 00:01:20.04, start: 0.047891, bitrate: 129 kb/s
04-06 12:17:34.402 30975-30975/me.rapchat.rapchat E/Studio Process: Stream #1:0(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s (default)
04-06 12:17:34.402 30975-30975/me.rapchat.rapchat E/Studio Process: Metadata:
04-06 12:17:34.402 30975-30975/me.rapchat.rapchat E/Studio Process: creation_time : 1993-11-24 14:46:42
04-06 12:17:34.404 30975-30975/me.rapchat.rapchat E/Studio Process: [NULL @ 0xb5e4fc00] Unable to find a suitable output format for '[a1][a2]amerge,pan=stereo|c0<c0+c1|c1<c2+c3[aout]'
04-06 12:17:34.404 30975-30975/me.rapchat.rapchat E/Studio Process: [a1][a2]amerge,pan=stereo|c0<c0+c1|c1<c2+c3[aout]: Invalid argument
04-06 12:17:34.407 30975-30975/me.rapchat.rapchat E/Studio Status Failed: WARNING: linker: /data/user/0/me.rapchat.rapchat/files/ffmpeg has text relocations. This is wasting memory and prevents security hardening. Please fix.
ffmpeg version n2.4.2 Copyright (c) 2000-2014 the FFmpeg developers
built on Oct 7 2014 15:08:46 with gcc 4.8 (GCC)
configuration: --target-os=linux --cross-prefix=/home/sb/Source-Code/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/sb/Source-Code/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --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/sb/Source-Code/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/sb/Source-Code/ffmpeg-android/build/armeabi-v7a-neon --extra-cflags='-I/home/sb/Source-Code/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -mfpu=neon' --extra-ldflags='-L/home/sb/Source-Code/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
libavutil 54. 7.100 / 54. 7.100
libavcodec 56. 1.100 / 56. 1.100
libavformat 56. 4.101 / 56. 4.101
libavdevice 56. 0.100 / 56. 0.100
libavfilter 5. 1.100 / 5. 1.100
libswscale 3. 0.100 / 3. 0.100
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 0.100 / 53. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/data/user/0/me.rapchat.rapchat/cache/recording.m4a':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
creation_time : 2016-04-06 19:17:33
Duration: 00:00:01.56, start: 0.000000, bitrate: 144 kb/s
Stream #0:0(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 128 kb/s (default)
Metadata:
creation_time : 2016-04-06 19:17:33
handler_name : SoundHandle
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/data/user/0/me.rapchat.rapchat/cache/beats/d3c37d60-ed50-4c00-b454-4e399a7858ff.m4a':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: mp42isom
creation_time : 1993-11-24 14:46:42
encoder : Max 0.9.1
iTunSMPB : 00000000 00000840 000003c0 000000000035dc00 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
date : 2015
Duration: 00:01:20.04, start: 0.047891, bitrate: 129 kb/s
Stream #1:0(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s (default)
Metadata:
creation_time : 1993-11-24 14:46:42
[NULL @ 0xb5e4fc00] Unable to find a suitable output format for '[a1][a2]amerge,pan=stereo|c0<c0+c1|c1<c2+c3[aout]'
[a1][a2]amerge,pan=stereo|c0<c0+c1|c1<c2+c3[aout]: Invalid argument回答 4
Stack Overflow用户
发布于 2016-04-07 04:23:18
整个过滤器复合体应该是一个字符串，没有空格，或者用引号"括起来(如果有)。现在，ffmpeg认为复合体在第二卷过滤器之后结束，并试图将复合体的其余部分解析为输出令牌。
Stack Overflow用户
发布于 2016-04-07 05:03:22
如果这能帮助其他人解决这个问题，这是我最终确定的工作代码。
String files = "-i " + mVoiceFile.getAbsolutePath() + " -i " + mBeatFile.getAbsolutePath();
String filter = " -filter_complex [0:a]volume=0.99[a1];[1:a]volume=0.3[a2];[a1][a2]amerge=inputs=2,volume=1.3,pan=stereo|c0<c0+c2|c1<c1+c3[aout]";
String output = " -map [aout] -strict -2 " +mRapFile.getAbsolutePath();
String cmd = files+filter+output;Stack Overflow用户
发布于 2019-10-18 17:32:13
add dependencies implementation 'com.writingminds:FFmpegAndroid:0.3.2' (为实现添加依赖项
public boolean mergeAudio(Context context, File[] voiceFile) {
final boolean[] isSuccess = {false};
File ffmpegFile = new File(getMusicFilename());
if (ffmpegFile.exists()) {
ffmpegFile.delete();
}
String s = "";
String s_index = "";
String fileSize = "n=" + voiceFile.length;
for (int i = 0; i < voiceFile.length; i++) {
s = s + "-i " + voiceFile[i].getPath() + " ";
s_index = s_index + "[" + i + ":0]";
}
String str_cmd = s + "-filter_complex " + s_index + "concat=" + fileSize + ":v=0:a=1[out] -map [out] " + getMusicFilename();
String[] cmd = str_cmd.split(" ");
FFmpeg ffmpeg = FFmpeg.getInstance(context);
try {
ffmpeg.loadBinary(new LoadBinaryResponseHandler() {
@Override
public void onStart() {
}
@Override
public void onFailure() {
}
@Override
public void onSuccess() {
}
@Override
public void onFinish() {
}
});
} catch (FFmpegNotSupportedException e) {
Log.d("FFmpegNotException_", e.getMessage());
}
try {
ffmpeg.execute(cmd, new ExecuteBinaryResponseHandler() {
@Override
public void onStart() {
}
@Override
public void onProgress(String message) {
Log.v("onProgress", message);
}
@Override
public void onFailure(String message) {
Log.v("onFailure", message);
}
@Override
public void onSuccess(String message) {
isSuccess[0] = true;
Log.v("onSuccess", message);
}
@Override
public void onFinish() {
Log.v("finsish", "finish");
}
});
} catch (Exception e) {
Log.d("NotException_", e.getMessage());
// Handle if FFmpeg is already running
} finally {
if (ffmpeg.isFFmpegCommandRunning()) {
ffmpeg.killRunningProcesses();
}
}
return isSuccess[0];
}
public static String getMusicFilename() {
return "/sdcard/podmod/merged_audio.wav";
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/36460638
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