How to use MediaStream ？

[Caner]

hi :
I saw that the API can use MediaStream addTrack, I want to combine them to get a stream of audio and video，Can you do an example? I tried to do it myself, but it didn't work
exp:

[Sergei Kol'miller]

hi : I saw that the API can use MediaStream addTrack, I want to combine them to get a stream of audio and video，Can you do an example? I tried to do it myself, but it didn't work exp:

How You solve this problem?

[Tiger Cox]

Hi, was this possible?