Java Ffmpeg-在android中将视频分成30秒的部分

我正在做一个项目。我想把视频分成30秒相等的部分。如果视频的长度比理想情况下的30秒和15秒长45秒。我已经创建了一个方法，该方法取起点和终点，并运行Ffmpeg命令来剪切视频。这就是我到目前为止创造的

   private void executeCutVideoCommand(int startMs, int endMs) {
        File moviesDir = Environment.getExternalStoragePublicDirectory(
                Environment.DIRECTORY_MOVIES
        );

        String filePrefix = "cut_video";
        String fileExtn = ".mp4";
        String yourRealPath = getPath(VideoCutterActivity.this, selectedVideoUri);
        File dest = new File(moviesDir, filePrefix + fileExtn);
        int fileNo = 0;
        while (dest.exists()) {
            fileNo++;
            dest = new File(moviesDir, filePrefix + fileNo + fileExtn);
        }

        filePath = dest.getAbsolutePath();
        String[] complexCommand = {"-ss", "" + startMs / 1000, "-y", "-i", yourRealPath, "-t", "" + (endMs - startMs) / 1000,"-vcodec", "mpeg4", "-b:v", "2097152", "-b:a", "48000", "-ac", "2", "-ar", "22050", filePath};

        execFFmpegBinary(complexCommand);
        MediaScannerConnection.scanFile(VideoCutterActivity.this,
                new String[] { filePath },
                null,
                new MediaScannerConnection.OnScanCompletedListener() {

                    public void onScanCompleted(String path, Uri uri) {

                        Log.i("ExternalStorage", "Scanned " + path + ":");
                        Log.i("ExternalStorage", "-> uri=" + uri);
                    }
                });


    }

    /**
     * Executing ffmpeg binary
     */
    private void execFFmpegBinary(final String[] command) {
        try {
            ffmpeg.execute(command, new ExecuteBinaryResponseHandler() {
                @Override
                public void onFailure(String s) {
                    Log.d(TAG, "FAILED with output : " + s);
                }

                @Override
                public void onSuccess(String s) {
                    Log.d(TAG, "SUCCESS with output : " + s);
                        Intent intent = new Intent(VideoCutterActivity.this, PreviewActivity.class);
                        intent.putExtra(FILEPATH, filePath);
                        startActivity(intent);
                }

                @Override
                public void onProgress(String s) {
                    progressDialog.setMessage("progress : " + s);
                }

                @Override
                public void onStart() {
                    progressDialog.setMessage("Processing...");
                    progressDialog.show();
                }

                @Override
                public void onFinish() {
                    progressDialog.dismiss();


                }
            });
        } catch (FFmpegCommandAlreadyRunningException e) {
            // do nothing for now
        }
    }

我试图在方法调用中添加一个循环，但应用程序崩溃了

    cutVideo.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                choice = 2;

                if (selectedVideoUri != null) {
                    int start,end;
                    for (int i=0;i<=duration;i=i+30){
                        start=i;
                        end=start+30;
                        executeCutVideoCommand(start,end);

                    }
//                    executeCutVideoCommand(rangeSeekBar.getSelectedMinValue().intValue() * 1000, rangeSeekBar.getSelectedMaxValue().intValue() * 1000);

                } else
                    Snackbar.make(mainlayout, "Please upload a video", 4000).show();
            }
        });


    }

cutVideo.setOnClickListener（新视图.OnClickListener（）{
@凌驾
公共void onClick（视图v）{
选择=2；
if（selectedVideoUri！=null）{
int开始，结束；
对于（int i=0；i是相关的，如何分割文件..首先让它在CLI环境（而不是android）中工作。然后将类似脚本的一系列CLI命令传输到android中，确保它们不会同时运行（在循环中）它们应该是序列化的。我不明白你的回答。你能详细说明ffmpeg吗？或者代码有问题吗？