defaultconfig {  ......  externalNativeBuild {   @R_906_1512@ {   cppFlags ""   }  }  ndk {   abifilters "armeabi-v7a"  }  } 

 externalNativeBuild {  cmake {   path "CMakeLists.txt"  }  }  sourceSets {  main {   jniLibs.srcDirs = ['libs']   jni.srcDirs = []  }  } 

 add_library( # Sets the name of the library.   audio-handle     # Sets the library as a shared library.   SHARED     # PRovides a relative path to your source file(s).   src/main/cpp/ffmpeg_cmd.c   src/main/cpp/cmdutils.c   src/main/cpp/ffmpeg.c   src/main/cpp/ffmpeg_filter.c   src/main/cpp/ffmpeg_opt.c) add_library( ffmpeg   SHARED   IMPORTED ) set_target_properties( ffmpeg    PROPERTIES IMPORTED_LOCATION    ../../../../libs/armeabi-v7a/libffmpeg.so ) include_directories(src/main/cpp/include) find_library( LOG-lib   log ) target_link_libraries( audio-handle    ffmpeg    ${log-lib} ) 调用FFmpeg命令行进行音频处理：  /**  * 调用ffmpeg处理音频  * @param handleType handleType  */  private void doHandleAudio(int handleType){  String[] commandLine = null;  swITch (handleType){   case 0://转码   String transformFile = PATH + File.separator + "transform.aac";   commandLine = FFmpegUtil.transformAudio(srCFile, transformFile);   break;   case 1://剪切   String cutFile = PATH + File.separator + "cut.mP3";   commandLine = FFmpegUtil.cutAudio(srcFile, 10, 15, cutFile);   break;   case 2://合并   String concatFile = PATH + File.separator + "concat.mp3";   commandLine = FFmpegUtil.concatAudio(srcFile, appenDFile, concatFile);   break;   case 3://混合   String mixFile = PATH + File.separator + "mix.aac";   commandLine = FFmpegUtil.mixAudio(srcFile, appendFile, mixFile);   break;   default:   break;  }  executeFFmpegCmd(commandLine);  }

 /**  * 使用ffmpeg命令行进行音频转码  * @param srcFile 源文件  * @param targetFile 目标文件（后缀指定转码格式）  * @return 转码后的文件  */  public static String[] transformAudio(String srcFile, String targetFile){  String transformAudioCmd = "ffmpeg -i %s %s";  transformAudioCmd = String.format(transformAudioCmd, srcFile, targetFile);  return transformAudioCmd.split(" ");//以空格分割为字符串数组  }    /**  * 使用ffmpeg命令行进行音频剪切  * @param srcFile 源文件  * @param startTime 剪切的开始时间(单位为秒)  * @param duration 剪切时长(单位为秒)  * @param targetFile 目标文件  * @return 剪切后的文件  */  @SupPressLint("DefaultLocale")  public static String[] cutAudio(String srcFile, int startTime, int duration, String targetFile){  String cutAudioCmd = "ffmpeg -i %s -ss %d -t %d %s";  cutAudioCmd = String.format(cutAudioCmd, srcFile, startTime, duration, targetFile);  return cutAudioCmd.split(" ");//以空格分割为字符串数组  }    /**  * 使用ffmpeg命令行进行音频合并  * @param srcFile 源文件  * @param appendFile 待追加的文件  * @param targetFile 目标文件  * @return 合并后的文件  */  public static String[] concatAudio(String srcFile, String appendFile, String targetFile){  String concatAudioCmd = "ffmpeg -i concat:%s|%s -acodec copy %s";  concatAudioCmd = String.format(concatAudioCmd, srcFile, appendFile, targetFile);  return concatAudioCmd.split(" ");//以空格分割为字符串数组  }    /**  * 使用ffmpeg命令行进行音频混合  * @param srcFile 源文件  * @param mixFile 待混合文件  * @param targetFile 目标文件  * @return 混合后的文件  */  public static String[] mixAudio(String srcFile, String mixFile, String targetFile){  String mixAudioCmd = "ffmpeg -i %s -i %s -filter_complex amix=inputs=2:duration=First -strict -2 %s";  mixAudioCmd = String.format(mixAudioCmd, srcFile, mixFile, targetFile);  return mixAudioCmd.split(" ");//以空格分割为字符串数组  }

 public static void execute(final String[] commands, final OnHandleListener onHandleListener){  new Thread(new Runnable() {   @override   public void run() {   if(onHandleListener != null){    onHandleListener.onBegin();   }   //调用ffmpeg进行处理   int result = handle(commands);   if(onHandleListener != null){    onHandleListener.onEnd(result);   }   }  }).start();  }  private native static int handle(String[] commands);

 JNIexport jint JNicalL Java_com_frank_ffmpeg_FFmpegCmd_handle (JNIenv *env, jclass obj, jobjectArray commands){  int argc = (*env)->GetArrayLength(env, commands);  char **argv = (char**)malloc(argc * sizeof(char*));  int i;  int result;  for (i = 0; i < argc; i++) {  jstring jstr = (jstring) (*env)->GetObjectArrayElement(env, commands, i);  char* temp = (char*) (*env)->GetStringUTfchars(env, jstr, 0);  argv[i] = malloc(1024);  strcpy(argv[i], temp);  (*env)->ReleaseStringUTFChars(env, jstr, temp);  }  //执行ffmpeg命令  result = run(argc, argv);  //释放内存  for (i = 0; i < argc; i++) {  free(argv[i]);  }  free(argv);  return result; } 

 int run(int argc, char **argv) {  /****************省略********************/  //注册各个模块  avcodec_register_all(); #if CONFIG_AVDEVICE  avdevice_register_all(); #endif  avfilter_register_all();  av_register_all();  avformat_network_init();  show_banner(argc, argv, options);  term_init();  /****************省略********************/  //解析命令选项与打开输入输出文件  int ret = ffmpeg_parse_options(argc, argv);  if (ret < 0)  exit_program(1);  /****************省略********************/  //文件转换  if (transcode() < 0)  exit_program(1);  /****************省略********************/  //退出程序操作：关闭文件、释放内存  exit_program(received_nb_signals ? 255 : main_return_code);  ffmpeg_cleanup(0); } 

 static int transcode(void) {  int ret, i;  AVFormatContext *os;  OutputStream *ost;  InputStream *ist;  int64_t timer_start;  int64_t total_packets_written = 0;  //转码方法初始化  ret = transcode_init();  if (ret < 0)  goto fail;    if (stdin_interaction) {  av_log(NULL, AV_LOG_INFO, "Press [q] to stop, [?] for help/n");  }  timer_start = av_gettime_relative();   #if HAVE_pthreadS  if ((ret = init_input_threads()) < 0)  goto fail; #endif  //transcode循环处理  while (!received_sigterm) {  int64_t cur_time= av_gettime_relative();    //如果遇到"q"命令，则退出循环  if (stdin_interaction)   if (check_keyboard_interaction(cur_time) < 0)   break;    //判断是否还有输出流  if (!need_output()) {   av_log(NULL, AV_LOG_VERBOSE, "No more output streams to write to, finishing./n");   break;  }    ret = transcode_step();  if (ret < 0 && ret != AVERROR_EOF) {   char errbuf[128];   av_strerror(ret, errbuf, sizeof(errbuf));     av_log(NULL, AV_LOG_ERROR, "Error while filtering: %s/n", errbuf);   break;  }    //打印音视频流信息  print_report(0, timer_start, cur_time);  } #if HAVE_PTHREADS  free_input_threads(); #endif    //文件末尾最后一个stream，刷新解码器buffer  for (i = 0; i < nb_input_streams; i++) {  ist = input_streams[i];  if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {   process_input_packet(ist, NULL, 0);  }  }  flush_encoders();  term_exit();    //写文件尾，关闭文件  for (i = 0; i < nb_output_files; i++) {  os = output_files[i]->ctx;  if ((ret = av_write_trailer(os)) < 0) {   av_log(NULL, AV_LOG_ERROR, "Error writing trailer of %s: %s", os->filename, av_err2str(ret));   if (exit_on_error)   exit_program(1);  }  }    //关闭所有编码器  for (i = 0; i < nb_output_streams; i++) {  ost = output_streams[i];  if (ost->encoding_needed) {   av_freep(&ost->enc_ctx->stats_in);  }  total_packets_written += ost->packets_written;  }    if (!total_packets_written && (abort_on_flags & ABORT_ON_FLAG_EMPTY_OUTPUT)) {  av_log(NULL, AV_LOG_FATAL, "Empty output/n");  exit_program(1);  }    //关闭所有解码器  for (i = 0; i < nb_input_streams; i++) {  ist = input_streams[i];  if (ist->decoding_needed) {   avcodec_close(ist->dec_ctx);   if (ist->hwaccel_uninit)   ist->hwaccel_uninit(ist->dec_ctx);  }  }    //省略最后的释放内存  return ret; }