Hi - Will Plex be fully supporting ATSC 3.0 tuning?
I recently purchased a SiliconDust HDHomeRun 4K ATSC 3.0 tuner, which will be arriving shortly.
I saw this posting on the SiliconDust forums that describes how some ATSC 3.0 channels will be tuned: https://forum.silicondust.com/forum/viewtopic.php?f=133&t=74215
I suspect that Plex may not support this yet. Is anybody at Plex working on ATSC 3.0 tuning?
Thanks,
AzJazz
It would be nice to hear if Plex is looking to support this new tuner.
I received my HDHomeRun ATSC 3.0 tuner, and it looks like Plex supports it (at least at some level). Plex does tune the ATSC 3.0 channels but the channel changes are slow to change. This could be a artifact of ATSC 3.0, not sure yet.
Iām not getting any audio, but I the SiliconDust forums indicate that the audio problem is from our city transmission towers, and not Plex related.
I will update this thread as I get more experience with the new tuner / Plex interactions.
AzJazz
Well, I have both the EXTEND and the CONNECT 4K up and running with Plex. The guide is a tad outdated (not even taking into account the ATSC 3.0 broadcasts we do have here). But itās pretty slick to have more tuners at any rate 
Looking forward to things getting ironed out over timeā¦
Upon reading the forums more, it would appear the audio is AC-4 which isnāt supported yet by ffmpeg and thus likely not in plex either. This seems to be a pretty good roadblock for early adopters
This is almost certainly it. I get audio using the HD Home Run native app, but not in Plex on ATSC 3.0 stations. I do on ATSC 1.0 stations, so itās definitely codec.
The ironic thing is that the iOS native HD Home Run app doesnāt support tuning to the ATSC 3.0 at all (you get no video or audio) while the Plex iOS app will tune them and show video, but no audio.
Hopefully ffmpeg adds AC-4 support soon, I have to disable my HDHR4K for Plex, and had to plug my old HDHR Connect in for DVR use. There was an ffmpeg enhancement request from a year ago that was closed as ādonāt fixā, but with ATSC 3.0 now live, and the HDHR4K in the wild, the request was reopened, but with no timeline.
Itād be nice if the PMS / Live TV DVR was smart enough to fall back on the two available 1.0 tuners in the meantime 
I donāt think this is possible for now. The limitation is occurring on SiliconDustās side with their HDHR Setup/Configuration toolset. When you perform a HDHR channel scan, only one of the two ATSC channels appears in the final list, and the ATSC 3.0 channel is only one in the list after the scanning is complete. Plex uses this source-filtered list in the end, just sees the remaining ATSC 3.0 channels. The filtered-out ATSC 1.0 channels and visible to Plex.
When you do a HDHR channel scan with the SiliconDust web application, you can see the ATSC 1.0 channels appear momentarily along with the ATSC 3.0 channels, and then youāll see the ATSC 1.0 channels disappear during the scan.
Iām about to get my HDHomerun Quatro 4K ATSC 3.0 tuner. I was hoping the audio codec issue would be resolved by the time it arrives. Looks like Were both in the same Portland market. Although most of our channels are now broadcasting using ATSC 3.0 Iām told very little to no content that takes advantage of the enhancements of ATSC 3.0 so the only difference is the compression method for broadcast 1080i to now 1080p.
Iām wondering if you can actually see any difference in the MPEG2 from the ATSC 1.0 tuner to the higher performance of the ATSC 3.0 tuner viewing 1080 content?
As of today, PMS still does not support AC-4. Iām in the Pensacola/Mobile Area and Plex is not recognizing an audio stream.
Has anyone found a good source showing programs that are/will be broadcasting in 4k?
Matt
I donāt think anyone will be broadcasting in 4k for years. Iād love to be proven wrong on that, but Iād settle for getting AC-4 working with the current regular HD streams.
I agree. Just the AC-4 audio improvements would be great for now. And for those wondering, the improved multi-path rejection alone is enough to justify switching to ATSC 3.0
When Iāve tested it, the picture looks great and the file sizes are small. Thereās no interlacing at 1080, which makes me happy.
As noted above, it doesnāt look like FFMPEG has support for AC-4 yet. Until FFMPEG has support, Plex almost certainly isnāt going to have support. So while this request is appropriate, itās unlikely to change without FFMPEG support. (I say this as a person who has an ATSC 3.0 tuner in hand)
Same here. Tuner in hand, road block seems to be FFMPEG. Iāve submitted a request on #8349, Iād suggest everyone do the same.
Just created an account on the ffmpeg forum and added my voice to the enhancement request there (https://trac.ffmpeg.org/ticket/8349#comment:7) Also bumped the importance of the request from āwishā to āimportantā because, well, it is important for those of us with ATSC 3.0 tuners and Plex. Not just a wish, that was ridiculous. Will probably get changed back by the devs but if enough of us keep upping it perhaps that will nudge it up the priority list.
I have a Connect 4K on the way now. Since there is no ATSC 3.0 broadcasting now here in Memphis, I presume that Plex Live TV & DVR will work fine with the Connect 4k for ATSC 1.0 broadcasts. Am I correct on that?
@pbillings - You are partially correct. The Connect 4K will properly support ATSC 1.0 broadcasts, as long as there isnāt a ATSC 3.0 broadcast with the same Guide Number.
Currently, the Connect 4K channel scanning process will provide only one tunable channel if there is an ATSC 3.0 and ATSC 1.0 channel for the same Guide Number. For example, in Phoenix we have KNXV that broadcasts ATSC 1.0 and ATSC 3.0. The ATSC 1.0 for ABC15-HD is on Guide Number 15.1 ā¦ AND ā¦ ABC15-NG is also on Guide Number 15.1. The HDHomeRun scanning process gives priority to the ATSC 3.0 broadcast, so when Plex tunes KNXV 15.1 on the Connect 4K, it will tune KNXV-NG. I donāt know of any way to override this behavior.
So, for my home setup, I disable channel 15.1 on my Connect 4K to prevent ATSC 3.0 recording, and keep 15.1 enabled on my Connect Duo to allow tuning the KNXV ATSC 1.0 channel.
In Las Vegas. Having the same issue with my new Homerun 4k Quatro. Any channel that is ATSC 3.0 has no sound on Plex. Would love to see AC-4 support.
Detroit just started ATSC 3.0 today. I can view with native HDHomerun app but Plex reported can not tune to the channel. hope they can come a fix soon.
