decodebin2, multiqueue: MPEG-2 file doesn't preroll

Submitted by Mart Raudsepp @leio

Link to original bug (#695717)

Description

The following media file doesn't play with playbin, when playing video and audio together:

http://people.freedesktop.org/~leio/gstreamer/31740_The_Heat_trl.mpeg (228MB, so not sure how long I can keep it hosted there)

It works when disabling audio or video via audio-sink=fakesink or video-sink=fakesink; or via manual pipelines with just video or audio.

It prerolls, but then is stuck in some first frame or so. That's with some old 0.10. But Tim has tested it with 1.0.5 and git of a couple days ago as well and confirmed the problem (though I think he said it didn't preroll there).

gst-discoverer seems to also say a wrong duration to it.
totem just goes totally nuts on it, it seems.

mplayer, vlc, ffplay and so on play it fine.