/**
 * Load FFmpeg binary
 */
public static boolean init(final Context context)
{
    if (ffmpeg == null)
    {
        Log.d(TAG, "Creating FFmpeg instance");
        final FFmpeg tmpFfmpeg = FFmpeg.getInstance(context.getApplicationContext());
        final FFprobe tmpFfprobe = FFprobe.getInstance(context.getApplicationContext());

        if(tmpFfmpeg.isSupported() && tmpFfprobe.isSupported())
        {
            ffmpeg = tmpFfmpeg;
            ffprobe = tmpFfprobe;
            return true;
        }
        else
        {
            return false;
        }
    }
    else
    {
        return true;
    }
}
 

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    if (FFmpeg.getInstance(this).isSupported()) {
        // ffmpeg is supported
        versionFFmpeg();
        //ffmpegTestTaskQuit();
    } else {
        // ffmpeg is not supported
        Timber.e("ffmpeg not supported!");
    }

    if (FFprobe.getInstance(this).isSupported()) {
        // ffprobe is supported
        versionFFprobe();
    } else {
        // ffprobe is not supported
        Timber.e("ffprobe not supported!");
    }

}
 

public static void trim(Context context, String inputFile, String outputFile, long startMs, long endMs, final VideoTrimListener callback) {
  final String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(new Date());
  final String outputName = "trimmedVideo_" + timeStamp + ".mp4";
  outputFile = outputFile + "/" + outputName;

  String start = convertSecondsToTime(startMs / 1000);
  String duration = convertSecondsToTime((endMs - startMs) / 1000);
  //String start = String.valueOf(startMs);
  //String duration = String.valueOf(endMs - startMs);

  /** 裁剪视频ffmpeg指令说明：
   * ffmpeg -ss START -t DURATION -i INPUT -codec copy -avoid_negative_ts 1 OUTPUT
   -ss 开始时间，如： 00:00:20，表示从20秒开始；
   -t 时长，如： 00:00:10，表示截取10秒长的视频；
   -i 输入，后面是空格，紧跟着就是输入视频文件；
   -codec copy -avoid_negative_ts 1 表示所要使用的视频和音频的编码格式，这里指定为copy表示原样拷贝；
   INPUT，输入视频文件；
   OUTPUT，输出视频文件
   */
  //TODO: Here are some instructions
  //https://trac.ffmpeg.org/wiki/Seeking
  //https://superuser.com/questions/138331/using-ffmpeg-to-cut-up-video

  String cmd = "-ss " + start + " -t " + duration + " -accurate_seek" + " -i " + inputFile + " -codec copy -avoid_negative_ts 1 " + outputFile;
  //String cmd = "-ss " + start + " -i " + inputFile + " -ss " + start + " -t " + duration + " -vcodec copy " + outputFile;
  //{"ffmpeg", "-ss", "" + startTime, "-y", "-i", inputFile, "-t", "" + induration, "-vcodec", "mpeg4", "-b:v", "2097152", "-b:a", "48000", "-ac", "2", "-ar", "22050", outputFile}
  //String cmd = "-ss " + start + " -y " + "-i " + inputFile + " -t " + duration + " -vcodec " + "mpeg4 " + "-b:v " + "2097152 " + "-b:a " + "48000 " + "-ac " + "2 " + "-ar " + "22050 "+ outputFile;
  String[] command = cmd.split(" ");
  try {
    final String tempOutFile = outputFile;
    FFmpeg.getInstance(context).execute(command, new ExecuteBinaryResponseHandler() {

      @Override public void onSuccess(String s) {
        callback.onFinishTrim(tempOutFile);
      }

      @Override public void onStart() {
        callback.onStartTrim();
      }
    });
  } catch (Exception e) {
    e.printStackTrace();
  }
}
 

private void initFFmpegBinary(Context context) {
  if (!FFmpeg.getInstance(context).isSupported()) {
    Log.e("ZApplication","Android cup arch not supported!");
  }
}