[mythtv-users] Wierd recording problem on HDHR tuners

[glen]

On Wed, 2019-11-20 at 11:52 -0600, Kenneth Emerson wrote:
> Iave 2 HDHR tuners: a quttro and a dual. All programming is OTA. All
> recordings are perfect except for 1 channel (NBC). Watching
> recordings from this channel breaks up for 1 second or less whenever
> there is a large change in the picture like when the broadcast throws
> up an ID banner for the news program. It's as if the stream is
> missing a type 'A' frame so it pixelates until it gets the next A
> frame.
> 
> So I have experimented as follows:
> Check signal with HDHR app: 100% for all three measurements
> use all the tuners (total of 6) -- all have the problem
> Connect a different antenna: same problem
> Disable commercial flagging: same problem
> Connect antenna to TV (live-no mythtv): perfect picture
> Use smart TV's software to connect directly to HDHR: perfect picture
> 
> This tells me something is happening while reading/writing the stream
> by the backend. I'm running v30 on Ubuntu 16.4. None of the other
> channels exhibit this behavior. The problem is definitely in the
> recording and not the playback.
> 
> The recordings aren't unwatchable, just (very) annoying. I don't know
> what else to try besides reinstalling everything including upgrading
> to Ubuntu 18.04. Does anyone have any ideas less drastic?
> 
> -- Ken Emerson
> 
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maybe caputre stream with hdhomerun_config command line utility to tune
and capture stream away from myth and see if that capture exhibits the
same thing.
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