How do I Stop 1 media at time

HEllo,

i'm using User media acquisition to get both audio analyser +Webcam management.

it works great but:

how can i set a way to be able to stop only microphone or only webcam ?

i tryed manythings, but it seems actually not possible because there is only one action wich stop everything --> UserMedia : Stop

is there any plugin that allow this options:

UserMedia: Stop camera

UserMedia : Stop Microphone

thanks.