How can i hide video of a participant?

How can i hide video of a specific participant so that i will not receive their stream to lower my bandwidth consumption. It’s like the “low bandwidth” or “audioOnlyMode” feature but for a specific participant only, not all participant.

I edited the jicofo’s ColibriConferenceImpl muteParticipant to make a MuteVideoIqHandler. am i doing it right?

where can i find MuteIq.NAMESPACE? i now its value is “http://jitsi.org/jitmeet/audio”, i want to change it to “http://jitsi.org/jitmeet/video

Interested in this as well…