_get_next_fragment_timestamp() returns relative timestamp to period start. But gst_mpd_client_stream_seek() uses absolute MPD timeline. https://bugzilla.gnome.org/show_bug.cgi?id=781183
_get_next_fragment_timestamp() returns relative timestamp to period start. But gst_mpd_client_stream_seek() uses absolute MPD timeline. https://bugzilla.gnome.org/show_bug.cgi?id=781183