IMSC-1 image subtitles broken after update of isoboxer library
Created by: TobbeEdgeware
The update of codem-isoboxer library beyond version 0.2.8 in connection to MSS merge has broken the imsc-1 image subtitle rendering due to different parsing of the subs box.
A test asset is included in the reference player: http://vm2.dashif.org/dash/vod/testpic_2s/imsc1_img.mpd
I'll make a PR to fix the problem.