dash playback doesn't adapt to higher resolution

Submitted by Jai Soni

Link to original bug (#784083)

Description

Dear Members,

On gstreamer-1.12.0 and coresponding gst-pluings-bad version , when i try to play this stream (http://yt-dash-mse-test.commondatastorage.googleapis.com/media/car-20120827-manifest.mpd) the playback is not adapted to higher resolution.
Playback starts from the lowest varient, than bitrate is changed to highest resolution only to fallback to the lowest one. This issue is seen 100/100 times irrespective of the network speed.

NOTE: this issue wasn't to be seen in earlier gstreamer versions (in my case gstreamer version 1.8.3)

Thanks

Version: 1.12.0