FFmpeg在从视频中提取MP3时出错

我想执行FFmpeg命令，从应用程序资产文件夹中的视频中提取MP3格式的音频 . 有关更多信息，请参阅http://writingminds.github.io/ffmpeg-android-java/

String sourceFilePath = "file:///android_asset/SampleVideo.mp4";
destFilePath = mp3File.getAbsolutePath();

FFmpeg ffmpeg = FFmpeg.getInstance(MainActivity.this);
    try {

        String cmd[] = new String[]{"/data/data/com.example.bansi_vasundhara.videotomp3_demo/files/ffmpeg", "-i", sourceFilePath, "-vn", "-acodec copy", destFilePath};

        ffmpeg.execute(cmd, new ExecuteBinaryResponseHandler() {

            @Override
            public void onStart() {
                Log.e("gc", "Command Started");
            }

            @Override
            public void onProgress(String message) {
                Log.e("gc", "onProgress" + message);
            }

            @Override
            public void onFailure(String message) {
                Log.e("gc", "onFailure command" + message);
            }

            @Override
            public void onSuccess(String message) {
                Log.e("gc", "onSuccess command" + message);
            }

            @Override
            public void onFinish() {
                Log.e("gc", "onFinish command");
            }
        });

    } catch (FFmpegCommandAlreadyRunningException e) {
        // Handle if FFmpeg is already running
        e.printStackTrace();
    }

但是我收到了一个错误 . 请建议任何解决方案 .

java.io.IOException：运行exec（）时出错 . 命令：[/data/data/com.example.bansi_vasundhara.videotomp3_demo/files/ffmpeg,/data/data/com.example.bansi_vasundhara.videotomp3_demo/files/ffmpeg,i-i,file:///android_asset/SampleVideo.mp4 ，-vn，-acodec copy，/ storage / sdcard0 / VideoToMP3 / SampleMP3.mp3]工作目录：null环境：在java.lang.Rrocesstime.exec的java.lang.ProcessManager.exec（ProcessManager.java:211）中为null（ Runtime.java:173）at java.lang.Runtime.exec（Runtime.java:128）at com.github.hiteshsondhi88.libffmpeg.ShellCommand.run（ShellCommand.java:10）at com.github.hiteshsondhi88.libffmpeg.FFmpegExecuteAsyncTask .doInBackground（FFmpegExecuteAsyncTask.java:38）位于java.util.concurrent的android.os.AsyncTask $ 2.call（AsyncTask.java:288）的com.github.hiteshsondhi88.libffmpeg.FFmpegExecuteAsyncTask.doInBackground（FFmpegExecuteAsyncTask.java:10） .FutureTask.run（FutureTask.java:237）在android.os.AsyncTask $ SerialExecutor $ 1.run（AsyncTask.java:231）at java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1112）at at Java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:587）at java.lang.Thread.run（Thread.java:818）引起：java.io.IOException：java上没有这样的文件或目录 . java.lang.ProcessManager.exec（ProcessManager.java:209）中的lang.ProcessManager.exec（本机方法）