[mythtv-users] Android mythfrontend log file?

[Peter Bennett]

On 4/13/20 2:12 PM, James Abernathy wrote:
>
>
> On Mon, Apr 13, 2020 at 11:16 AM Peter Bennett <pb.mythtv at gmail.com 
> <mailto:pb.mythtv at gmail.com>> wrote:
>
>
>
>     On 4/13/20 7:35 AM, James Abernathy wrote:
>>
>>
>>     On Sun, Apr 12, 2020 at 4:55 PM James Abernathy
>>     <jfabernathy at gmail.com <mailto:jfabernathy at gmail.com>> wrote:
>>
>>
>>
>>         On Sun, Apr 12, 2020 at 3:00 PM Peter Bennett
>>         <pb.mythtv at gmail.com <mailto:pb.mythtv at gmail.com>> wrote:
>>
>>
>>
>>             On 4/11/20 11:57 AM, James Abernathy wrote:
>>>
>>>
>>>             On Sat, Apr 11, 2020 at 11:04 AM Peter Bennett
>>>             <pb.mythtv at gmail.com <mailto:pb.mythtv at gmail.com>> wrote:
>>>
>>>
>>>
>>>                 On 4/11/20 7:15 AM, Jim Abernathy wrote:
>>>                 > When I run mythtv-frontend on a Shield TV does it
>>>                 create a log file?
>>>                 > If so how do I get it off the Shield TV to a PC I
>>>                 can examine it with??
>>>                 >
>>>                 > Jim A
>>>                 >
>>>                 >
>>>
>>>                 adb logcat outputs the log file in real time to
>>>                 stdio, with already past
>>>                 data included at the beginning.
>>>
>>>                 To get mythfrontend log -
>>>                 adb logcat mfe:D *:S |& tee android.log
>>>
>>>                 To get full android log
>>>                 adb logcat |& tee android.log
>>>
>>>                 Press ctrl-c to stop it.
>>>
>>>                 Peter
>>>
>>>             I have the logcat working but I notice that there is not
>>>             much information once view a recording start. No
>>>             indication of anything I do with the keyboard or remote.
>>>             I'm trying to catch a log when the timeline problem I
>>>             have shows up.
>>>
>>>             Is there an equivalent in Android to --loglevel debug?
>>>
>>>             Jim A
>>>
>>>
>>
>>             In the front end on the android
>>             Setup->General->Remote Control->Enable Network Remote
>>             Control Interface
>>             You have to restart frontend for it to take effect
>>             Then, on linux:
>>             telnet <android ip address> 6546
>>             set verbose playback
>>
>>             I am not sure if you can set debug, perhaps with
>>             general:debug
>>
>>             Peter
>>
>>         Thanks, using this info I ran a test where my Nvidia Shield
>>         TV was running Android Mythtv-frontend VERSION:
>>         v31.0/fixes/31 31.20200101-1 91 QT/5.14.1 DBSchema/1361 which
>>         is the latest I see on the android wiki links
>>         (mythfrontend-20200323-arm64-v31.0.apk
>>         <https://dl.bintray.com/bennettpeter/generic/mythtv_31/android_64/:mythfrontend-20200323-arm64-v31.0.apk>)
>>         not sure why the version from telnet query version isn't the
>>         same.
>>
>>         I select Live TV and once it starts I backup a few seconds to
>>         make the video not so jumpy.  This is standard practice for
>>         me on Live TV on any frontend platform. I started this test
>>         at 16:17 and at 16:31, I noticed a lot of jitter in the
>>         picture.  I checked the adb logcat and the display was
>>         posting a lot of entries per second.  At the beginning you'd
>>         see 1 per sec.  Normally I'd backup a few seconds to fix it
>>         for a while. However, sometimes it fixes itself on it's own. 
>>         This time it fixed before I could come back in and skip
>>         backwards.  The issue is my adb linux system is in another room.
>>
>>         So I posted a log file on my google drive and the link is
>>         below. You see the number of entries increase around 16:31.
>>         Hopefully, this data will help point to a solution.
>>
>>         https://drive.google.com/open?id=1KS-w8pIi6P-xRo12ULYcass4V4628CoE
>>
>>
>>         Jim A
>>
>>     This situation was the same except it shows the effect of fixing
>>     the problem temporarily with a skip backwards -15 seconds.
>>     https://drive.google.com/file/d/147ksKSUPpf44Ghzuo69WH8han2olHgoE/view?usp=sharing
>>
>>     Jim A
>>
>     Have you tried adjusting the audio read-ahead setting in frontend
>     setup? (Setup->Video->Playback->Advanced->Audio read-ahead). You
>     can increase this value to 500, 1000, even up to 5000 and see if
>     it helps.
>
>     Peter
>
> I tried 500, 1000, and 2000.  All seem to stop the visual jitter that 
> occurs 10-15 minutes into the live TV.  However, I can't tell that 
> from the log file. I have a once a second jitterometer reading and 
> occasional AV Sync with audio ahead or behind so many milliseconds 
> (+/- 30 ms).
>
> What would be the best settings? Is a lower values that solves the 
> problem better than a higher value that solves the problem?
>
> Jim A
>
A bigger number uses more memory and may cause a delay before starting 
playback and adds a delay in playback from real time, by the number of 
milliseconds specified. So best to use the smallest number that works.
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