[mythtv-commits] Ticket #11106: when playing large recording via UPnP, seek causes playback to end

[MythTV]

#11106: when playing large recording via UPnP, seek causes playback to end
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     Reporter:  p-fbsd-bugs@…         |      Owner:  dblain
         Type:  Bug Report - General  |     Status:  new
     Priority:  minor                 |  Milestone:  unknown
    Component:  MythTV - UPnP         |    Version:  0.25.2
     Severity:  medium                |   Keywords:
Ticket locked:  0                     |
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 When I play back some of my recordings via UPnP, any attempt to fast-
 forward causes the playback to exit. It's highly annoying.

 The problem exists for both of my (independent) backends:
 * backend p: Ubuntu 11.10, mythtv 0.24.0+fixes.20110908.1de0431-0ubuntu1
 * backend h: FreeBSD 8.2-STABLE, mythtv-0.25.2

 It occurs when I play back from either of my UPnP frontends:
 * frontend w: WD TV Live plus
 * frontend h: FreeBSD 8.2-STABLE, xbmc-11.0_5

 but NOT when I play back via mythfrontend 0.25.2 (no UPnP).

 The file size of the recording seems to affect the behavior. I
 experimented on the 0.25.2 backend by copying the recording file to the
 "Videos" directory and truncating it to various lengths.  The problem did
 not occur until I got past a threshold length.

 The original recording file:
 {{{
 % ls -ls 1071_20120818195600.mpg
  8545440 -rw-rw-r--  2 mythtv  video  8746232444 Sep  9 01:18
 1071_20120818195600.mpg
 }}}

 My test procedure iteration was:

 {{{
 rm sample.mpg
 mythutil --scanvideos
 dd if=1071_20120818195600.mpg of=sample.mpg bs=1024k count=<N>
 mythutil --scanvideos
 mythcommflag --rebuild --video `pwd`/sample.mpg
 }}}

 For N <= 6600, seeking seemed to work OK. For N>= 6700, the problem
 appeared. I did not try values between 6600 and 6700.

 I looked at the old patch in ticket:1591 and applied it to
 av_gen_search(), but it didn't seem to make any difference.

 Since the threshold size is in the neighborhod of 7GB, I do not have a
 good place to host this file. If anyone would like a copy, I can put it on
 my home server (128kbit/s uplink) or I can upload it somewhere.

-- 
Ticket URL: <http://code.mythtv.org/trac/ticket/11106>
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