Black levels / contrast change with subtitles
Hello everybody,
since the last updates of iTunes (11.1.5) + OS X (10.9.2), watching a movie with subtitles is no more comfortable. I see that other people on the forum also encountered the problem.
I'll try to be clear and detailed:
Each time a subtitle is displayed, the black level (or the contrast if you prefer) on the full screen slightly becomes brighter. The result is a flashing movie each time someone is speaking (subtitles). This was not present before the very last updates. This is especially very annoying when watching a movie with top/down black bars (cinema 2:1 image ratio), as there is a big area of black pixels. Or watching a story in space (try Gravity...). I would say: it is not watchable...
This happens (in my case) when using full screen mode, HD movie, and HDTV connected via HDMI. Maybe in other situation also, I don't know.
But for instance, wathching the HD version using a window (not clicking on fullscreen double arrow) on the TV, or SD version in full screen on an external monitor (which is not HDCP compatible), or SD version of the movie in full screen to the TV via HDMI, the issue is not visible. In fact the problem is not present in these situations because the contrast levels on the full screen remains brighter always, even when there is no subtitle. So there is no flashing behaviour. But the black is "not black" anymore. It is dark grey.
Do you know whether this is already reported to Apple dev team? Is it a known issue?
Should I report?
Thanks.
Mac mini (Late 2012), OS X Mavericks (10.9.2)