NoXiRecorder

• function
  • Video and Audio Recording on a Single PC
  • Synchronize Two PCs to Record Video and Audio
  • Capture Webcam Cropped to 480x720
  • Server Sends Microphone Input and Receives It and Loops It Back to the Speaker
  • Server Sends Webcam and Receives It and Loops It Back to the Speaker

Environment

• Macbook Air (M1, 2020)
  • macOS Monterey 12.5.1
  • Apple M1
  • RAM 8GB
• ALIENWARE M15
  • Windows 11 Home
  • Intel Core i7-11800H
  • RAM 16GB

Installation

Install ffmpeg

• Windows
  1. Download ffmpeg (https://www.gyan.dev/ffmpeg/builds/ffmpeg-release-full.7z)
  2. Unzip the downloaded file
  3. Place it in any folder and pass the path to "ffmpeg-5.1.2-full_build/bin".
• Mac OS
  1. Install via Homebrew: brew install ffmpeg

Install NoXiRecorder

• Clone the github repository: git clone https://github.com/ahclab/NoXiRecorder.git
  • movement: cd NoXiRecorder
• Create conda env: conda create -n recorder python=3.8
  • source env: conda activate recorder
• Dependencies:
  • Install requirements: pip install -r requirements.txt
  • Install repo: pip install -e .

Setup

Get json of video device (!Windows Only!)

1. Execute program

python NoXiRecorder/utils/getDeviceID.py

2. Enter device ID from image

Enter the device ID referring to the image stored in NoXiRecorder/utils/video_device_img.

3. Check the output json

VIDEO DEVICE JSON: NoXiRecorder/setting/video_device.json

This must be done every time a device is made to connect.

Edit the settings file (NoXiRecorder/setting/...)

The main variables that need editing are listed below

• user: Select the role of the computer to be used from "expert", "novice", "observer".
• device: Enter the name of the equipment to be used for the recording
• id: Enter the device ID used for recording. This ID will be used if the device name is not found.
• ip: Please enter ip address for server.

Allow network traffic for security software

If network traffic is limited by security software, communication between computers is not possible.
Be sure to turn it off.

Run

Capture

1. Expert/Novice PC

python NoXiRecorder/capture.py

To end capture, press "e" on the capture screen.

Audio and Video Recording

If you want to take audio and video on one computer, please run the following program.

1. Expert/Novice PC

python NoXiRecorder/AVrecorder.py

Press "s" to start record, "e" to end record.
If you get "AttributeError: module 'ffmpeg' has no attribute 'input'", please execute the following command.
pip uninstall python-ffmpge ffmpeg-python
pip install ffmpeg-python

If you get an "Invalid buffer size error", please review the settings file.

NoXi Database Recordings

To synchronize two PCs for recording, run the following program.

1. Expert/Novice PC

python NoXiRecorder/server.py

2. Observer PC

python NoXiRecorder/client.py

Command

• time: Check the current time
• ready: Confirmation of communication status
• set option: Setting Options
  ex.) --num 01
• cat option: Display of currently set options
• record: Launch AVrecordeR
• start: Start of recording
• end: End of recording
• exit: Disconnection of communication and program termination

Transmission of audio between Expert and Novice

1. Expert PC

python NoXiRecorder/monitorServerAudio.py --to_user novice

2. Novice PC

python NoXiRecorder/monitorServerAudio.py --to_user expert

3. Expert PC

python NoXiRecorder/monitorClientAudio.py --monitor_user novice

4. Novice PC

python NoXiRecorder/monitorClientAudio.py --monitor_user expert

Audio Monitoring of Expert/Novice by Observer

1. Expert PC

python NoXiRecorder/monitorServerAudio.py --to_user observer

2. Novice PC

python NoXiRecorder/monitorServerAudio.py --to_user observer

2. Observer PC (observer)

python NoXiRecorder/monitorClientAudio.py --monitor_user expert
python NoXiRecorder/monitorClientAudio.py --monitor_user novice

Tips

Since you will have multiple terminal windows open, we recommend installing the following terminal applications.

• Windows
  1. Installation of WindowsTerminal (https://apps.microsoft.com/store/detail/windows-terminal/9N0DX20HK701?hl=ja-jp&gl=jp&icid=TopNavWindowsApps)
  2. Using Anaconda Python with PowerShell (https://helve-blog.com/posts/python/powershell-anaconda-python/)
• Mac OS
  1. Installation of Iterm2 (https://iterm2.com)

For monitoring of Expert and Novice by observers, it is recommended that a screen sharing application be used in conjunction.
Chrome Remote Desktop, which is OS-independent, is the easiest.

• Remote Desktop
  1. Installation of Chrome Remote Desktop (https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwj_gIDyl8H8AhWprlYBHVS_DNkQFnoECBIQAQ&url=https%3A%2F%2Fremotedesktop.google.com%2F%3Fhl%3Dja&usg=AOvVaw0eAhneSA3hLZ5kRRLHbGUr)
  2. Set up a server (Expert/Novice)
  3. Set up a client (Observer)