[mythtv-commits] Ticket #12191: Livetv: Many stream interruptions

[MythTV]

#12191: Livetv: Many stream interruptions
-------------------------------------+-------------------------------------
     Reporter:  xyz@…                |      Owner:
         Type:  Bug Report -         |     Status:  new
  General                            |  Milestone:  unknown
     Priority:  major                |    Version:  0.27.1
    Component:  MythTV - DVB         |   Keywords:  interruptions,dvb s2
     Severity:  medium               |  ,live-tv
Ticket locked:  0                    |
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 Hello all,

 since I upgraded from Ubuntu v12 to v14 and to nvidia 9800GTX2 I can't
 view livetv any more in quality.
 I get distortions in the mpeg streams sometimes even no audio. This
 happens round about every 5 - 30 seconds.

 It is the same mysql-database and the same configuration as before.

 I don't think it could be performance related, as CPU's are below 20%. No
 IOWait in top. Slowdelete activated.

 I have got DVBS2, driver is vdpau.

 I also tried different deinterlacers and even deactivating it, no change.

 I haven't found any mpeg related error in the log, only strange entry is
 about unknown AFD ID's, but I am not sure, if that's related.

 Another interesting entry is: "[dsmcc] Dropping block size 4096 with tag
 21, carouselID 11, dataBroadcastID 0x123"

 see:
 ----------------------
 2014-06-26 22:57:49.973112 I  MythSocket(35d2140:86): read  <- 86 4
 3640
 2014-06-26 22:57:49.991958 I  MythSocket(35d2140:86): write -> 86 39
 QUERY_RECORDER 5[]:[]GET_FRAMES_WRITTEN
 2014-06-26 22:57:49.992608 I  [dsmcc] Dropping block size 4096 with tag
 21, carouselID 11, dataBroadcastID 0x123
 2014-06-26 22:57:49.992659 E  AFD: VBI: Unknown descriptor: 44
 2014-06-26 22:57:49.992870 I  MythSocket(35d2140:86): read  <- 86 4
 3640
 2014-06-26 22:57:49.992938 E  AFD: VBI: Unknown descriptor: 44
 2014-06-26 22:57:49.993164 I  [dsmcc] Dropping block size 4096 with tag
 20, carouselID 10, dataBroadcastID 0x123
 2014-06-26 22:57:49.993177 E  AFD: VBI: Unknown descriptor: 44
 2014-06-26 22:57:49.993177 I  [dsmcc] Dropping block size 4096 with tag
 21, carouselID 11, dataBroadcastID 0x123
 2014-06-26 22:57:49.998054 I  RingBuf(/MEDIA/video/live-
 tv/11301_20140626205637.mpg): safe_read(... at 3030428, 458752) -> 190068,
 took 0 ms (1000Mbps) avg 183 ms
 ----------------------

 If you can give me some advice, how I could narrow analysis down, that
 would be great?

 Best regards
 Qeldroma

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Ticket URL: <https://code.mythtv.org/trac/ticket/12191>
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