@tanaosritum wrote:
I want you to go and read it.
OK, I see why you aren't getting Atmos. You are playing a media title with Dolby TrueHD. Roku devices will not bitstream TrueHD or DTS-MA. Your server is transcoding the audio to standard DD. You will never get Atmos from a TrueHD track. The online streaming sites all use a different version of Atmos, which is embedded in Dolby Digital Plus (EAC-3).
As to Dolby Vision, how did you rip your disc? MakeMKV has had the ability to rip UHD discs for quite some time, but the first versions that supported it did not rip the DV layer properly. If you ripped your discs with those earlier versions, you might need to rip it again with the latest version.
They also mentioned reducing the video bitrate to not exceed the limits of the Fast Ethernet connection on the Ultra 4800. The only way to reduce the bitrate is to transcode the video, and doing that will also strip out DV.
By the way, the 4800 does have a Dolby Digital encoder, so it can internally transcode some unsupported audio. But in my testing it doesn't always convert TrueHD to DD. some titles it worked and some did not. But this too will strip out Atmos.
With a Roku player, you will never get Atmos from a ripped movie disc, unless Roku finally makes a super version. For that kind of media, you need an Nvidia Shield. My UHD rips all play TrueHD/Atmos and STS:X/Master Audio without any need for transcoding. You really haven't any other option. None of my rips contain Dolby Vision, so I can't speak to how well that works.
Dan
Roku Community Streaming Expert
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