dense_slam_ROS_realsense python

### Checklist

- [X] I have searched for [similar issues](https://github.com/isl-org/Open3D/issues).
- [X] For Python issues, I have tested with the [latest development wheel](http://www.open3d.org/docs/latest/getting_started.html#development-version-pip).
- [X] I have checked the [release documentation](http://www.open3d.org/docs/release/) and the [latest documentation](http://www.open3d.org/docs/latest/) (for `master` branch).

### My Question

Hello,
I'm trying to run the dense_slam_gui.py with a realsense camera thru ROS.
When I run my code, I'm receiving

[Open3D WARNING] Skipped -1 frames in update T!
[Open3D WARNING] Skipped -1 frames in update T!
[Open3D WARNING] Skipped -1 frames in update T!
[Open3D WARNING] Skipped -1 frames in update T!
[Open3D WARNING] Skipped -1 frames in update T!
[Open3D WARNING] Skipped -1 frames in update T!
[Open3D WARNING] Skipped -1 frames in update T!
[Open3D WARNING] Skipped -1 frames in update T!
[Open3D WARNING] Skipped -1 frames in update T!
[Open3D WARNING] Skipped -1 frames in update T!
Exception in thread UpdateMain:
Traceback (most recent call last):
File "/usr/lib/python3.8/threading.py", line 932, in _bootstrap_inner
self.run()
File "/usr/lib/python3.8/threading.py", line 870, in run
self._target(*self._args, **self._kwargs)
File "/home/-/ws/src/pckg/scripts/slam.py", line 462, in update_main
pcd = self.model.voxel_grid.extract_point_cloud(
RuntimeError: [Open3D Error] (void open3d::core::__OPEN3D_GET_LAST_CUDA_ERROR(const char*, const char*, int)) /root/Open3D/cpp/open3d/core/CUDAUtils.cpp:318: /root/Open3D/cpp/open3d/core/ParallelFor.h:85 ParallelFor failed.: OPEN3D_GET_LAST_CUDA_ERROR(): out of memory

[slam.txt](https://github.com/isl-org/Open3D/files/9259791/slam.txt)