[gst-devel] How can I make two links between two elements?

[wl2776]

filesrc ! typefind ! mpegpsdemux name=demux multiqueue name=mq demux.audio_c0
! mq.sink0 mq.src0 ! mp3parse ! autoaudiosink  demux.video_e0 ! mq.sink1
mq.src1 ! mpegvideoparse ! mpeg2dec ! queue ! ffmpegcolorspace !
autovideosink

This has produced the required pipeline, but then I've got:

message from "demux" (error): GstMessageError, gerror=(GstGError)NULL,
debug=(string)"gstmpegdemux.c\(2725\):\ gst_flups_demux_loop\ \(\):\
/GstPipeline:pipeline0/GstMpegPSDemux:demux:\012stream\ stopped\,\ reason\
not-negotiated";

I am testing this using seek example
($GST_PLUGINS_BASE/test/examples/seek.c)
I've added the code, dumping a pipeline to a .dot file.
Here they are: player.dot (20kb): 
http://gstreamer-devel.966125.n4.nabble.com/file/n2296731/player.dot
player.dot , and produced PNG (500kb): 
http://gstreamer-devel.966125.n4.nabble.com/file/n2296731/player.png
player.png 

What is not negotiated? 
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