Audio dropouts

DVBLink TV Server for Synology NAS is discussed here!

Audio dropouts

Postby gmaza » Wed Aug 16, 2017 8:52 pm

Hello,

While playing live TV or recorded TV, I have audio dropouts: little glitches every 30s or a few minutes. Really annoying!
I noticed that glitches occur more often if I play TV channels with lots of commercials or jingles like sports or news.
My backend is Dvb link v6 running on a Synology NAS (DSM6)

The problem occurs both with live TV and recordings with the following front-ends:
- Intel Pc running Kodi 16(OE7) or 17(OE8)
- Android tablet running Kodi17.3
- Pi3 running Kodi 17.3 (Osmc2017-7-1)
- VLC running on Android tablet or Intel PC (Linux Mint 18.2 or Win10)

Both Kodi ans VLC logs report some kind of audio/video sync issue...
For example:
Kodi:
Code: Select all
15:46:56.094 T:1929376752   DEBUG: ActiveAE::SyncStream pll:0.00000 (act:1.00000 lim:0.00000) rr:0.99996 threshold:0.020 error:0.988370
15:46:56.926 T:1552409584   DEBUG: CWebServer[8080]: request received for /jsonrpc
15:46:57.095 T:1929376752   DEBUG: Previous line repeats 3 times.
15:46:57.095 T:1929376752   DEBUG: ActiveAE::SyncStream pll:0.00000 (act:1.00000 lim:0.00000) rr:0.99995 threshold:0.020 error:0.977527
15:46:58.144 T:1929376752   DEBUG: ActiveAE::SyncStream pll:0.00000 (act:1.00000 lim:0.00000) rr:0.99995 threshold:0.020 error:0.980304
15:46:58.394 T:1399055344   ERROR: ffmpeg[5363E3F0]: [eac3] exponent 28 is out-of-range
15:46:58.394 T:1399055344   ERROR: ffmpeg[5363E3F0]: [eac3] error decoding the audio block
15:46:58.516 T:1552409584   DEBUG: CWebServer[8080]: request received for /jsonrpc
15:46:59.143 T:1929376752   DEBUG: Previous line repeats 3 times.
15:46:59.144 T:1929376752   DEBUG: ActiveAE::SyncStream pll:0.00000 (act:1.00000 lim:0.00000) rr:0.99996 threshold:0.020 error:0.994427
15:47:00.128 T:1552409584   DEBUG: CWebServer[8080]: request received for /jsonrpc
15:47:00.144 T:1929376752   DEBUG: ActiveAE::SyncStream pll:0.00000 (act:1.00000 lim:0.00000) rr:0.99996 threshold:0.020 error:0.986944
15:47:00.157 T:1552409584   DEBUG: CWebServer[8080]: request received for /jsonrpc
15:47:01.145 T:1929376752   DEBUG: Previous line repeats 2 times.
15:47:01.146 T:1929376752   DEBUG: ActiveAE::SyncStream pll:0.00000 (act:1.00000 lim:0.00000) rr:0.99995 threshold:0.020 error:0.975937
15:47:01.745 T:1552409584   DEBUG: CWebServer[8080]: request received for /jsonrpc
15:47:02.194 T:1929376752   DEBUG: Previous line repeats 3 times.


VLC:
Code: Select all
00007f0928c874e8] avcodec decoder warning: cannot decode one frame (77777 bytes)
[00007f0928c874e8] avcodec decoder warning: cannot decode one frame (1343 bytes)
[00007f0928c874e8] avcodec decoder warning: cannot decode one frame (7968 bytes)
[0000000001ad32a8] pulse audio output warning: starting late (-10778 us)
[0000000001ad32a8] core audio output warning: playback too early (-83858): down-sampling
[00007f0928c874e8] core decoder warning: early picture skipped
[00007f0928c01838] ts demux warning: discontinuity received 0xa instead of 0x8 (pid=620)
[00007f0928c01838] ts demux warning: discontinuity received 0xd instead of 0x5 (pid=630)
[00007f0928c01838] ts demux error: libdvbpsi error (PSI decoder): TS discontinuity (received 3, expected 0) for PID 0
[00007f0928c01838] ts demux error: libdvbpsi error (PSI decoder): TS discontinuity (received 3, expected 0) for PID 17
[00007f0928c01838] ts demux error: libdvbpsi error (PSI decoder): TS discontinuity (received 0, expected 8) for PID 18
[00007f0928c01838] ts demux error: libdvbpsi error (PSI decoder): TS discontinuity (received 6, expected 5) for PID 610
[0000000001ad32a8] pulse audio output warning: starting late (-19100 us)
[0000000001ad32a8] core audio output warning: playback way too early (-203429): playing silence
[eac3 @ 0x7f0928dc8860] exponent out-of-range
[eac3 @ 0x7f0928dc8860] error decoding the audio block


The problem does not occur with my Pc running my old OE6!

What I tried and did not work :
- Overcloking the Pi
- playing with Kodi settings: deinterlacing, passthrough, adjust display refresh rate,, sync playback to display, hardware acceleration, display resolution and refresh rate, audio output device, PLL adjustment.

I hope someone can help!

Cheers!
gmaza
 
Posts: 4
Joined: Wed Aug 07, 2013 11:55 am


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