[mythtv-users] Issue - MythtvFrontend Nvidia Shield Audio Pass fuzz

[Jon Boehm]

Wow too many Jon/Johns in this thread.

I like John Pilkington idea of buffer issues.  Either an uninitialized
buffer or buffer under-run as the stream starts.   Mythfrontend playback
starts really fast compared to the feq seconds of spinning when starting
from Kodi or other app.

On Sat, Dec 1, 2018 at 6:47 PM John P Poet <jppoet at gmail.com> wrote:

>
> On Sat, Dec 1, 2018 at 7:36 PM Jon Boehm <jon.s.boehm at gmail.com> wrote:
>
>> Peter, yes I confirmed those settings.  They where in the correct
>> configuration before I started messing with things today.  By themselves
>> they didn't improve my situation.
>>
>> However, GOOD NEWS, when I selected
>>
>> Android setting -> Display and Sound -> Advanced -> Fixed volume   ON
>>
>> Then I'm in Michael's situation.  I start playback and my receiver misses
>> the stream type.  BUT no more fuzz, just silence.  That's a big
>> improvement.  Then I play / pause and I'm of to the races, full
>> DolbyDigital passthrough.  For now this is very usable.  Just have to
>> educate my family.
>>
>> Let me know if you need help debugging this further.  I'm happy to help.
>>
>> Jon
>>
>> On Sat, Dec 1, 2018 at 3:08 PM John Pilkington <johnpilk222 at gmail.com>
>> wrote:
>>
>>> On 01/12/2018 22:36, Michael wrote:
>>> > On 12/1/18 2:45 PM, Peter Bennett wrote:
>>> >>
>>> >>
>>> >> On 12/1/18 3:31 PM, Jon Boehm wrote:
>>> >>> Hi,
>>> >>>
>>> >>> Love the Android MythtvFrontend.  Thankyou!!!!
>>> >>>
>>> >>> But I'm having an issue and don't see how I file issues on the git
>>> >>> page so I'm posting here.
>>> >>>
>>> >>> First the good -- I can get analog audio just fine.
>>> >>>
>>> >>> Problem - As soon as I enable and Digital Audio Capabilities (pass
>>> >>> through) my receiver does not recognize the digital audio stream and
>>> >>> never switches from the analog mode to digital codex.  All I get is
>>> a
>>> >>> harsh fuzz from the speakers.   I've seen this behavior on rare
>>> >>> occurrences with Kodi or a BluRay.  Stopping playback and restarting
>>> >>> fixes the problem but that doesn't help here.  Every digital stream
>>> >>> is corrupted.  If I play an old analog recording when passthrough is
>>> >>> enabled that works just fine.
>>> >>>
>>> >>> This is on a fresh install of
>>> >>> mythfrontend-20181124-arm64-v30-Pre-983-gca71c59e61a.apk
>>> >>> <
>>> https://dl.bintray.com/bennettpeter/generic/mythtv_30/android_64/:mythfrontend-20181124-arm64-v30-Pre-983-gca71c59e61a.apk> with
>>>
>>> >>> a v29 backend.  If it matters this is using my Onkyo TX-SR805.  Its
>>> >>> not the newest receiver but its new enough to support DTS-HS and
>>> >>> DD-TrueHD.
>>> >>>
>>> >>> Thanks.  I really really appreciate the mythfrontend for Android.
>>> >>>
>>> >>>
>>> >> Did you enable digital audio in Android settings as described in the
>>> wiki?
>>> >>
>>> >> https://www.mythtv.org/wiki/Android#Digital_Audio
>>> >
>>> >
>>> > I just walked through these on my system and it is exactly what I have
>>> > for Audio.   I went ahead an implimented the video settings as well
>>> just
>>> > to make sure I had the right configuration but I am still getting a
>>> > similar audio issue described above - except I can get it to work by
>>> > pausing/fast forwarding.
>>> >
>>> >
>>> > Michael
>>>
>>> I see something that just might be related on my main system (and not
>>> tied to Android) when I record  a program near start-of-service on a
>>> part-time channel.  The audiooutput graph in the editor then sometimes
>>> shows data that is clearly not audio in its audio buffer, and I have had
>>> segfaults then.  I first saw this years ago and used to delay the start
>>> of recording until the stream-format information was more likely to
>>> match reality;  now that doesn't seem essential, but it does go wrong
>>> occasionally.
>>>
>>> ffmpeg  and mythffmpeg sometimes gave different results too, depending
>>> on exactly when they take their samples for stream analysis.
>>>
>>> John P
>>>
>>
> I was also having this issue, but it seems to have been solved for me by
> updating the firmware on my preamp.  So, it seems that just the right
> settings and components are necessary.
>
> John
>
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