Camera2 获取摄像头数据，使用 MediaCodec 编码，图像旋转 90 度，怎么解决？

主要代码如下

     try {
            mMediaCodec = MediaCodec.createEncoderByType("video/avc");
        } catch (IOException e) {
            e.printStackTrace();
            return;
        }
        MediaFormat format = MediaFormat.createVideoFormat("video/avc", mVideoSize.getWidth(), mVideoSize.getHeight());
        format.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface);
        format.setInteger(MediaFormat.KEY_BIT_RATE, 1250000);
        format.setInteger(MediaFormat.KEY_FRAME_RATE, 30);
        format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 5);
        format.setInteger(MediaFormat.KEY_ROTATION, 90);
        format.setInteger(MediaFormat.KEY_REPEAT_PREVIOUS_FRAME_AFTER, 1000 / 30);
        mMediaCodec.configure(format, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
        mEncoderSurface = mMediaCodec.createInputSurface();

and Camera2 Configuration is

  mPreviewBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_RECORD);
            mPreviewBuilder.addTarget(mPreviewSurface);
            if (isEncode) {
                mPreviewBuilder.addTarget(mEncoderSurface);
            }
            setUpCaptureRequestBuilder(mPreviewBuilder);
            mPreviewSession.setRepeatingRequest(mPreviewBuilder.build(), null, mBackgroundHandler);

get encode data from MediaCodec

           MediaCodec.BufferInfo mBufferInfo = new MediaCodec.BufferInfo();
            while (true) {
                int outputBufferIndex = venc.dequeueOutputBuffer(mBufferInfo, 0);
                if (outputBufferIndex >= 0) {
                    // outputBuffer is ready to be processed or rendered.
                    ByteBuffer buffer = venc.getOutputBuffer(outputBufferIndex);
                    onEncodedFrame(buffer, mBufferInfo);

getOutputBuffer获取的数据使用 RTMP 推流到服务器的时候是旋转 90 度的，应该怎么修改？