playbin(3): Disabling video flag has no effect when file has subtitles
Disabling GST_PLAY_FLAG_VIDEO does nothing when video has subtitle track enabled. Expected result would be to still see subtitles rendered and no video or nothing at all. Yet, video is still processed and rendered even with video flag removed. Same issue in playbin, playbin3 and gstplay(er) libs that use playbins internally.
audio(2) + text(4) results with video too:
gst-launch-1.0 playbin uri=file://video_with_subs.mkv flags=6audio only works correctly and gives no video:
gst-launch-1.0 playbin uri=file://video_with_subs.mkv flags=2