Playback Issues - Audio/Video & Power

Help with audio & video playback issues, TV display type recognition & compatibility, HDCP messages, troubleshooting playback errors, advertisements, and resolving power issues.
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NTC
Level 10

Problem playing HEVC with AC-4 audio files on Ultra 2020

I have an Ultra 2020 that can easily play mp4 media files encoded with HEVC H265 video and Dolby AC-4 audio in both stereo and 5.1 multichannel.

However, when I try to play TS files of an ATSC 3.0 broadcast, containing the same codecs of HEVC and AC-4, there is no audio, only the video comes through, regardless of HDMI audio settings on the Roku.

Is it possible to play ATSC 3.0 captured streams with the Ultra?

The Roku is on firmware 9.3.1 and connected directly to my Sony X900F.

3 REPLIES 3\
PDX-ATSC-3
Level 7

Re: Problem playing HEVC with AC-4 audio files on Ultra 2020

Me too. It is kind of why I upgraded to the new Ultra 2020 (fine print says it supports AC-4 audio, apparently it does so through the USB only???? 

I see this issue with my HDHomerun ATSC 3.0 Quattro. I get great OTA signals here in Portland, OR. When I added the HDHomerun app from the Microsoft Store, it informed me that I had to download Codec files to have Windows 10 be able to play audio--I did, and it worked.

So now... the HDHomerun App on Roku works, all non-ATSC 3.0 channels have both audio and video but the main networks (ABC, CBS, FOX, NBC) all come in with no sound.

Any solve/update info would be greatly appreciated. Thanks! 

0 Kudos
SAF64
Level 7

Re: Problem playing HEVC with AC-4 audio files on Ultra 2020

I'm having the same issues in my Roku 2020 and HDhomerun 4K. Picture is beautiful but no sound on all the channels that say HEVC which I assume are the ATSC 3.0 tuner channels...Frustrating to pay $199.00 for the HDhomeun 4K, plus the Roku 2020 cost only to have a picture with no sound. I've tried every HDMI setting on the Roku and even have the AC4 on, but nothing. 

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NTC
Level 10

Re: Problem playing HEVC with AC-4 audio files on Ultra 2020

Update: I now have the Roku Ultra 4800 connected to a Sony X900H. Software on Roku updated to 9.4.1-4212, and it still will not play the audio on a TS file containing HEVC Video and AC4. It will play those codecs if its in MP4.

The Roku will play TS files with mpeg video and AC3 audio. I have a support ticket open about it and it is still open. Support request #(3786225).