Does anyone know if
Ok, I've looked over this problem again and written some code to check out
jollyCocoa's answer pointed me in the right direction by suggesting to observe the status property on
AVPlayerItem. However the documentation doesn't seem to point out that this property (and it's
AVPlayerItemStatusReadyToPlay value in particular) might be related to buffering.
loadedTimeRanges property seems more related to buffering.
Doing KVO on that array was a bit trickier - the array object itself doesn't change, only it's items do - so I resorted to printing out it's content every second.
What I found out is that a few seconds in the queue's first item, the
loadedTimeRanges for the second item shows up a new
CMTimeRange with start time 0 and some small duration. The duration can increase up to 60 or so seconds while the previous item keeps playing.
AVQueuePlayer will buffer the next
AVPlayerItem while playing the current one.