what is command for adding text and audio in videoview #377

hi,
i have added library into gradle and also call load loadFFMpegBinary() function which is correctly loaded , now i am using below code,
`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);
Toast.makeText(MainActivity.this, "failed output "+s, Toast.LENGTH_SHORT).show();
}
@OverRide
public void onSuccess(String s) {
Log.d(TAG, "SUCCESS with output : " + s); //Perform action on success
Toast.makeText(MainActivity.this, "succcess output "+s, Toast.LENGTH_SHORT).show();
}
@OverRide
public void onProgress(String s) {
Log.d(TAG, "progress : " + s);

            }
            @Override public void onStart() {
                Log.d(TAG, "Started command : ffmpeg " + command);
                Toast.makeText(MainActivity.this, "Started command ", Toast.LENGTH_SHORT).show();

            }
            @Override public void onFinish() {
                Log.d(TAG, "Finished command : ffmpeg " + command);
                Toast.makeText(MainActivity.this, "Finished commeda", Toast.LENGTH_SHORT).show();
            }
        });
    }

    catch (FFmpegCommandAlreadyRunningException e) {
        Toast.makeText(this, ""+e, Toast.LENGTH_SHORT).show();
    }

}`

but in this function what is command for adding Text or Audio to videoview