Can nodejs archieve this function?

The app I developed has one-to-one real time vedio function, and it can be used simultaneously in multi-client (iOS、Android、Browser). I have use OpenTok to achieve it, 

The function I want to archieve is If one of  communicates  click the button in brwoser , Nodejs will start record the audio both of them in real-time,Once the vedio chat is over, I could hear their audio comments in one audio file. if nodejs can achieve please tell me how to do?

When the nodejs start record ,opentok must be run either

> The app I developed has one-to-one real time vedio function, and it can be used simultaneously in multi-client (iOS、Android、Browser). I have use OpenTok to achieve it,
> The function I want to archieve is If one of  communicates  click the button in brwoser , Nodejs will start record the audio both of them in real-time,Once the vedio chat is over, I could hear their audio comments in one audio file. if nodejs can achieve please tell me how to do?
> When the nodejs start record ,opentok must be run either
We can't answer this question for you. Node can be used for video/audio streaming, as you're already doing, but node itself doesn't know anything about video/audio. There are probably existing npm modules for dealing with video/audio recording, or maybe the modules you're already using support this function. Check the documentation for those modules. I don't know what OpenTok is or does; maybe it supports this function; check its documentation.

> The app I developed has one-to-one real time vedio function, and it can be used simultaneously in multi-client (iOS、Android、Browser). I have use OpenTok to achieve it,
> The function I want to archieve is If one of  communicates  click the button in brwoser , Nodejs will start record the audio both of them in real-time,Once the vedio chat is over, I could hear their audio comments in one audio file. if nodejs can achieve please tell me how to do?

Looks like OpenTok can do this by itself:
https://tokbox.com/opentok/api/#start_archive