Camera2 and MediaCodec

1.java

mSurfaceView.setAspectRatio(mPreviewSize.getWidth(), mPreviewSize.getHeight());

            mediaCodec = MediaCodec.createEncoderByType("video/avc");

            MediaFormat format = MediaFormat.createVideoFormat("video/avc", mVideoSize.getWidth(), mVideoSize.getHeight());
            int colorFormat = MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface;
            int videoBitrate = 90000; 
            int videoFramePerSecond = 25;
            int iframeInterval = 2;
            format.setInteger(MediaFormat.KEY_COLOR_FORMAT, colorFormat);
            format.setInteger(MediaFormat.KEY_BIT_RATE, videoBitrate);
            format.setInteger(MediaFormat.KEY_FRAME_RATE, videoFramePerSecond);
            format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, iframeInterval);

            mediaCodec.configure(format, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);

            List<Surface> surfaces = new ArrayList<>();
            mEncodeSurface = mediaCodec.createInputSurface();
            surfaces.add(mEncodeSurface);
            final Surface mPreviewSurface = new Surface(mSurfaceView.getSurfaceTexture());
            surfaces.add(mPreviewSurface);

            mCameraDevice.createCaptureSession(surfaces, new CameraCaptureSession.StateCallback() {

                @Override
                public void onConfigured(CameraCaptureSession session) {
                    mSession = session;
                    try {
                        CaptureRequest.Builder builder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
                        builder.addTarget(mPreviewSurface);
                        mSession.setRepeatingRequest(builder.build(), null, mBackgroundHandler);
                    } catch (CameraAccessException e) {
                        e.printStackTrace();
                    }
                }

                @Override
                public void onConfigureFailed(CameraCaptureSession session) {
                    // todo error
                }
            }, mBackgroundHandler);

2.java

CaptureRequest.Builder builder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_RECORD);
            builder.addTarget(mEncodeSurface);
            mSession.setRepeatingRequest(builder.build(), null, mBackgroundHandler);
            
            mediaCodec.setCallback(new MediaCodec.Callback() {
                @Override
                public void onInputBufferAvailable(MediaCodec codec, int index) {

                }

                @Override
                public void onOutputBufferAvailable(MediaCodec codec, int index, MediaCodec.BufferInfo info) {
                    // pushing data
                }

                @Override
                public void onError(MediaCodec codec, MediaCodec.CodecException e) {

                }

                @Override
                public void onOutputFormatChanged(MediaCodec codec, MediaFormat format) {

                }
            });
            mediaCodec.start();