DLNA, how does sequential playback work?

Question

DLNA

Hey!
I found a media server on Android: Bubble UPNP, if you start music from it on any media renderer device, then the songs are played sequentially, like in a playlist. Hence the question - how does the media renderer know what the next song is? What happens when Next and Previous are called?

Answer 1

The answer has finally been found.

• The Control Point can track the transition from PLAYING to PAUSED (or STOPPED?) and send a link to the next track to the DMR device. This is the most popular way.
  
• You can use the AVTransport service method - SetNextAVTransportURI() when starting a song: the renderer will prebuffer the next song, so the transition to it will happen faster, you can make a smooth transition.
  
• You can pass a playlist using SetStaticPlaylist() or SetStreamingPlaylist()
  
• The SetNextAVTransportURI() and Set*Playlist() methods are optional, they may or may not be present.