I am trying to use conference play api as below to play an image/video to all the participants of a video conference.

conference <confName> play {full-screen=true,png_ms=3000}<image file complete path>

I am expecting this image to be played to all pariticipants of the conference as full-screen for 3 seconds. But it plays as one of the screens besides the video screens of other participants for 3 seconds. What am I doing wrong?

Thanks

Ramesh