国标GB28181协议视频推流组件EasyGBD如何实现搜集视频采集数据功能？

<uses-feature android:name="android.hardware.camera" />
<uses-permission android:name="android.permission.CAMERA" />

mCamera = Camera.open(mCameraId);// 初始化创建Camera实例对象
mCamera.setErrorCallback((i, camera) -> {
    throw new IllegalStateException("Camera Error:" + i);
});

try {
    // TextureView的
    SurfaceTexture holder = mSurfaceHolderRef.get();
 
    // SurfaceView传入上面创建的Camera对象
    if (holder != null) {
        mCamera.setPreviewTexture(holder);
        Log.i(TAG, "setPreviewTexture");
    }
} catch (IOException e) {
    e.printStackTrace();
}
 
mCamera.startPreview();

Camera.Parameters parameters = mCamera.getParameters();
 
//查看支持的预览尺寸
List<Camera.Size> sizeList = parameters.getSupportedPictureSizes();
if(sizeList.size() > 1){
    Iterator<Camera.Size> iterator = sizeList.iterator();
    while (iterator.hasNext()){
        Camera.Size size = iterator.next();
    }
}
//设置预览尺寸
parameters.setPreviewSize(width, height);// 设置预览尺寸

previewCallback = (data, camera) -> {
    if (data == null)
        return;
    int result;
    if (camInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
        result = (camInfo.orientation + displayRotationDegree) % 360;
    } else {  // back-facing
        result = (camInfo.orientation - displayRotationDegree + 360) % 360;
    }
 
    if (i420_buffer == null || i420_buffer.length != data.length) {
        i420_buffer = new byte[data.length];
    }
 
    JNIUtil.ConvertToI420(data,i420_buffer,width,height,0,0,width,height,result % 360, 2);
    System.arraycopy(i420_buffer, 0, data, 0, data.length);
 
    if (mRecordVC != null) {
        mRecordVC.onVideo(i420_buffer, 0);
    }
 
    mVC.onVideo(data, 0);
    mCamera.addCallbackBuffer(data);
};