This knowledge base article will summarize the information on configuring an IP video device for online recording using a Nox A1 PSG system.
This document will focus on the supported cameras that Nox Medical recommends for use with our Nox A1 PSG system. Information on what models are recommended can be found at the bottom of the article.
Information on how to physically connect a video device can be found here.
1. Add the camera to an online room
When the camera is connected to the LAN network, it will automatically appear in the Add Device dialog of the Online Room setup. Select the camera and click Add to Room.
Now the camera has been physically added to your room and can be used in a recording.
2. Configure the recording properties
In the Online Room dialog select the video camera and click Edit Device.
Two default streaming protocols are available in the software for the supported cameras.
- MJPEG: For recording only video
- RTSP: For recording video and audio
Nox Medical recommends using the RTSP protocol as this includes timestamps and decreases the chances of streaming problems. Note that there can be some delay in streaming due to data processing. To avoid this, click Start Preview and evaluate the delay in seconds, then enter the number into the Video delay section. Noxturnal will correct depending on the number when the video is re-opened after the study has been recorded.
3. Select Video Profiles
In Noxturnal there are a four built in video profiles. They are different depending on if the setup is to record only video or with video and audio, and they differ in size and quality.
The table below describes the difference between the video profiles built within the software
VBR = Variable bit rate which varies the bit rate and is optimized for quality vs. storage. The bit rate defined by the user defines the percentage of signal quality.
The video profiles pick up the resolution that is setup up by the camera. In order to change the settings for the camera the user can open any web browser and access the camera settings by entering the camera IP address.
The estimated filesize is going to differ between the difference in bit rate, sampling rate and is also depended on the camera resolution. For comparison of file size it is recommended to do some test recordings.
Troubleshooting
No Video is displayed
Where the fix is to make sure that all profiles and setups for the cameras match. If the streaming protocol is set for MJPEG (only video) you need to make sure that the video profile selected is only recording video. The same applies for if the streaming protocol is set to RTSP (video and audio) and the video profile needs to match the RTSP protocol.
Video and audio is delayed or is lagging
In some cases, if the video and/or audio is lagging it is often due to the fact that the computer hardware does not handle compressing the quality of the data that is being captured by the camera. Therefore it is always recommended if any issues are seen, to lower the camera resolution in order to see if that solves any delays or lagging issues. Those settings are camera specific, are not related to Noxturnal and are accessible through a browser.
Attachement
Attached to this article is an updated list of the recommended cameras to use with Noxturnal 6.3. It also includes previously recommended cameras that are obsolete in the market. Please download the attached document at the bottom of the page.
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