Seems to be the same problem as described here: https://bugzilla.redhat.com/show_bug.cgi?id=618714 Tested it with Parole 0.52 and 0.60. SSA/ASS subtitles are just not displayed and no error messages are generated (Compiled with --enable-debug=full and run with --gst-debug-level=4). Furthermore I tested with both gstreamer 0.1 and 1.0 yielding the same results. In the reference bug report are test files to illustrate the bug.
On further testing I observed that ASS subtitle rendering works if the subtitle is within a mkv container. It seems only to bug out with external subtitle files.
It looks like this is an ongoing issue for gstreamer. There is a new plugin for gstreamer that handles this, however not automatically. I'll look into implementing this over the next few days. http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-bad-plugins/html/gst-plugins-bad-plugins-assrender.html
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