Working for me (video and audio) with an Nvidia Shield Pro (2019) using either Channels or HDhomerun app. Little bit of trouble with Channels - it had them, then it didn't, and now they're back (rescan/reload). Older Nvidia - no audio, as mentioned in other posts. Well done Silicon Dust. Update: Aud...

Jan 7 and lo and behold:

104.1 WCMH
106.3 FOX28
128.2 WTTE
153.1 WWHO

Testing with different apps...

Isn't the ac4 codec proprietary? If so, then ffmeg will not support it.