确定MediaRecorder.setVideoEncodingBitRate的正确值

Question

我正在使用MediaRecorder和android.hardware.camera2 API来实现视频记录，在googlesamples/android-Camera2Video之后，它像这样（link）来设置MediaRecorder：< / p>

    mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
    mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
    if (mNextVideoAbsolutePath == null || mNextVideoAbsolutePath.isEmpty()) {
        mNextVideoAbsolutePath = getVideoFilePath(getActivity());
    }
    mMediaRecorder.setOutputFile(mNextVideoAbsolutePath);
    mMediaRecorder.setVideoEncodingBitRate(10000000); // <--- look at this line
    mMediaRecorder.setVideoFrameRate(30);
    mMediaRecorder.setVideoSize(mVideoSize.getWidth(), mVideoSize.getHeight());
    mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
    mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
    int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();
    switch (mSensorOrientation) {
        case SENSOR_ORIENTATION_DEFAULT_DEGREES:
            mMediaRecorder.setOrientationHint(DEFAULT_ORIENTATIONS.get(rotation));
            break;
        case SENSOR_ORIENTATION_INVERSE_DEGREES:
            mMediaRecorder.setOrientationHint(INVERSE_ORIENTATIONS.get(rotation));
            break;
    }
    mMediaRecorder.prepare();

如您所见，它的setVideoEncodingBitRate具有固定值10000000，但是我找不到有关此值的任何解释，如何确定MediaRecorder.setVideoEncodingBitRate的正确值，还是应该只需使用固定值10000000？