1 Reply
      Latest reply: Dec 27, 2017 9:56 AM by jim0529 RSS
      jim0529 Level 1 Level 1 (0 points)

        Hi,

        We are testing HEVC video, which Apple requires fmp4 HLS.  We have this all working on Apple TV 4K with the exception of closed captions / sub titles.  We cannot get the sub titles to display - using ismc1 captions (from a ttml source) on Apple TV, though we can get it to display in Safari in some cases.

         

        It seems as if this is either buggy or not sufficiently supported currently?  Even Apple's advanced HEVC fmp4 sample stream does not display captions (from 607/708) nor the webvtt based sub titles

         

        Apple Sample stream  - from https://developer.apple.com/streaming/examples/

         

        https://tungsten.aaplimg.com/VOD/bipbop_adv_example_hevc/master.m3u8

         

        Has anyone had success with this?