JunH

### 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...

Is there a way to extract audio signals as well as visual frames? If there's a function like below "videos, audio_raw, meta = torchvision.io.read_video(video_path, pts_unit='sec')" in pytorch, it would be...