[mythtv-users] audio missing from part of recording

[Jim Abernathy]

On 10/25/18 4:12 PM, Jay Harbeston (ISeePeople) wrote:
>
>> On Oct 25, 2018, at 4:04 PM, Jim Abernathy <jfabernathy at gmail.com> wrote:
>>
>> This has recently started happening on my backend system. I start watching a show from a FE that was recorded the previous night and the picture is perfect HD, but the audio will go silent for a few minutes at most and then return.  These are OTA recordings made using a HDHR Quatro. I can't find a pattern yet, but it's usually 1-2 minutes into the start of a recording and then it returns in a few minutes.  There is no video noise or loss of signal.  All the channels that I've noticed this on have 100% as their signal strength.
>>
>> I checked the backend log and nothing unusual during the duration of the recording.
>>
>> I have the same experience using multiple frontends. So it's in the recording itself. This started withing the last month.  I've not seen this in many years of using Mythtv.
>>
>> Any ideas?
>>
>> Jim A
>>
>>
> I have seen this before as well on OTA, and I imagine it is the fault of the broadcast station. At that time it was long enough that I switched on the closed caption .  I believe I have only seen this on ABC here in America. Also of note was that in a couple of the instances, the background audio was ok, just the voice audio was missing. Strange!
>
> J.R.
>
Thanks,  I'm also in USA but this issue was with CBS network.  It was 
complete audio loss.  I went to CBS.com and played that portion with the 
missing audio just to make sure I didn't miss anything significant.  The 
remaining 55 minutes had no issue.

I'm leaning toward it being a broadcast issue.

My antenna is a good one 
(https://www.bestbuy.com/site/antennas-direct-clearstream-4max-indoor-outdoor-hdtv-antenna-black/5894080.p?skuId=5894080)

My tuner is SiliconDust Homerun HD Quatro, and my backend is a 3rd gen 
Core i7 with 16GB memory and 4-2GB hard drives in a set of mirrors for a 
total of 4GB.

I'm on Mythtv V29 on Ubuntu 16.04.

I'll keep an eye on it.  The only change I've made recently besides 
updating the Mythtv software occasionally, is 2 of my FEs are now RP3 B+ 
running LibreELEC.

I was suspecting the FEs but I tested mythtv-frontend on other computers 
in the house and they had the same issue, so I know it's in the recording.

Jim A


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