Pipeline not prerolling when tee has more than one src

[Jannis]

Hi list,

I create a videostream with this pipeline:

gst-launch-1.0 videotestsrc !
video/x-raw,width=640,height=360,pixel-aspect-ratio=1/1,framerate=25/1 !
timeoverlay ! clockoverlay deltay=50 ! vp8enc threads=2 deadline=35000 !
matroskamux streamable=true ! gdppay ! tcpserversink host=127.0.0.1
port=5000

When I display it using:

gst-launch-1.0 tcpclientsrc host=127.0.0.1 port=5000 ! gdpdepay ! tee
name=stream ! decodebin ! videoconvert ! ximagesink

everything is fine and the image is displayed. When I append another
element getting its data from the tee element:

gst-launch-1.0 tcpclientsrc host=127.0.0.1 port=5000 ! gdpdepay ! tee
name=stream ! decodebin ! videoconvert ! ximagesink stream. ! fakesink

the pipeline gets stuck in the PREROLLING state. Adding queues after the
tee and "stream.":

gst-launch-1.0 tcpclientsrc host=127.0.0.1 port=5000 ! gdpdepay ! tee
name=stream ! queue ! decodebin ! videoconvert ! ximagesink stream. !
queue ! fakesink

doesn't help, too.

What I actually want to do is save the stream to disk just as it comes
in (e.g. after the gdpdepay element) and decode+display it at the same time.

Best regards,
	Jannis