[mythtv-users] Mythbackend recording glitches

Peter Bennett pb.mythtv at gmail.com
Mon Oct 15 19:41:04 UTC 2018



On 10/15/2018 01:13 PM, Jay Harbeston (ISeePeople) wrote:
>
>
>> On Oct 15, 2018, at 11:50 AM, Allen Edwards 
>> <allen.p.edwards at gmail.com <mailto:allen.p.edwards at gmail.com>> wrote:
>>
>> I changed the name of my thread because the video card update 
>> problems are gone (thanks to the help from all of you) and I am only 
>> left with glitches in the recordings. I have done a lot of 
>> experimentation to try and isolate the problem but am at a loss as to 
>> what is going on.
>>
>> Here is an example of a bad glitch http://l-36.com/mythtv.jpg
>> Here is an example of a small one blown up to show it 
>> http://l-36.com/mythtv4.jpg
>
>
> You can use the hdhomerun_config and hdhomerun_config_gui utilities to 
> see the status of the stream using the following example:
>
> You will want to use the gui to set the channel to be verified and 
> then do the following:
> hdhomerun_config FFFFFFFF save /tuner0 capture.ts
> This will capture the video to the file capture.ts, and also echo 
> information while recording.
> Quoting from the hdhomerun development pdf document:
> Example output:
> ............n...............................n..........ts.......... -- 
> Video statistics -- 23323 packets recieved, 2 network errors, 1 
> transport errors, 1 sequence errors
>
> Advanced: A filename of “null” indicates no file should be created, 
> allowing the use of the save command as a diagnostic tool.
>
> Advanced: “-” may be used as a filename to indicate standard output, 
> allowing the save command to be used as a pipe on supported platforms.
>
> eg: hdhomerun_config FFFFFFFF save /tuner0 - | vlc -
> The dev document can be downloaded from SiliconDust, and has much more 
> information that can be had using the utility.
> Something you can also check using the hdhomerun_config_gui is the 
> signal strength and quality live.
> I have found these tools very handy.
I had the same problem with HD Homerun Prme, and the above test showed 
dropped packets. It was my router that was dropping UDP packets. I 
changed to a switch instead of the router between the HDHomerun Prime 
and the backend and the problem was solved.

Peter
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