[Rejected] Skip to end on live recording sometimes stops playback (1 Viewer)

[riksmith]

When i skip to the end on a live recording sometimes playback stops. Mostly this happens on HD recordings.

For tv there is a 3 second margin when skipping to the end but i guess sometimes this is too small. For normal video there is a 5 second margin.

I applied the 5 second margin to tv playback and now this has not happened.

Not sure this is the right solution, perhaps there is a problem lying deeper than this. Still decided to post a patch.

 

[elliottmc]

When i skip to the end on a live recording sometimes playback stops. Mostly this happens on HD recordings.

For tv there is a 3 second margin when skipping to the end but i guess sometimes this is too small. For normal video there is a 5 second margin.

I applied the 5 second margin to tv playback and now this has not happened.

Not sure this is the right solution, perhaps there is a problem lying deeper than this. Still decided to post a patch.

Hi,

Does this still happen on latest SVN (on server and client) ? Can you please check (and provide logs) before we consider this patch?

Best wishes,

Mark

 

[riksmith]

I installed the latest public SVN build ( i hope you meant that one). The answer is yes, logs attached.

Also tried latest trunk, same result.

 

[Seidelin]

Looking at the logs, this seems the interesting bit:

03-02-2010 19:16:12.493 [1614]CTsReaderFilter:: Seek-> 227.199997/230.199997
03-02-2010 19:16:12.493 [1614]seek to 227.199997 filepos:16f45d90 pid:30
03-02-2010 19:16:12.496 [1614] stop seek: 227.209122 at 16f090d1 - target: 227.199997, diff: 0.009125
03-02-2010 19:16:12.497 [1278]aud:OnThreadStartPlay(227.200000) 1.00
03-02-2010 19:16:12.547 [1278] H.264 I-FRAME found 229.489000
03-02-2010 19:16:12.600 [1cac]vid:OnThreadStartPlay(227.200000) 1.00 0
03-02-2010 19:16:12.602 [1278]Audio Samples : 14, First : 227.407, Last : 229.783
03-02-2010 19:16:12.603 [1278]Video Samples : 73, First : 229.489, Last : 230.989 GOP start : 229.489
03-02-2010 19:16:12.605 [1614]CTsReaderFilter::--SeekStart()-- No new seek 227.199997 ( Abs 227.199997 / 230.200317 ) - Stream compensated: 0, OnZap: 0, Force 0, Media changing: 0
03-02-2010 19:16:12.605 [1278]Compensation : ( Rnd : 0 mS ) Audio pts ahead Video Pts ( Recover skipping Audio ) ....
03-02-2010 19:16:12.606 [1614]CTsReaderFilter::--SeekStart()-- No new seek 227.199997 ( Abs 227.199997 / 230.200317 ) - Stream compensated: 0, OnZap: 0, Force 0, Media changing: 0
03-02-2010 19:16:12.607 [1278]aud:Compensation:2.289, Clock on start 0.000 m_rtStart:227200
03-02-2010 19:16:12.609 [1278]audDVBSubtitleFilter->SetTimeCompensation
03-02-2010 19:16:12.609 [1614]CTsReaderFilter::Run(1209.80) state 1 seeking 0
03-02-2010 19:16:12.609 [1614]CTsReaderFilter::Run(1209.80) state 2 -->done
03-02-2010 19:16:12.615 [1278]aud:set discontinuity
03-02-2010 19:16:12.615 [1278]Aud/Ref : 229.615, Late Compensated = 0.126 ( 0.126 A/V buffers=02/73), Clk : 0.000000, State 2
03-02-2010 19:16:12.621 [1278]Aud/Ref : 229.783, Late Compensated = 0.294 ( 0.278 A/V buffers=01/73), Clk : 0.016000, State 2
03-02-2010 19:16:12.627 [1cac]vid:set discontinuity
03-02-2010 19:16:12.627 [1cac]Vid/Ref : 229.489, Late I-frame(00), Compensated = 0.000 ( -0.016 A/V buffers=00/81), Clk : 0.016000, State 2
03-02-2010 19:16:12.632 [1cac]Vid/Ref : 229.509, Late ?-frame(00), Compensated = 0.020 ( -0.012 A/V buffers=00/82), Clk : 0.032000, State 2
03-02-2010 19:16:12.633 [1cac]Vid/Ref : 229.649, Late ?-frame(00), Compensated = 0.160 ( 0.128 A/V buffers=00/82), Clk : 0.032000, State 2
03-02-2010 19:16:12.634 [1cac]Vid/Ref : 229.669, Late ?-frame(00), Compensated = 0.180 ( 0.148 A/V buffers=01/82), Clk : 0.032000, State 2
03-02-2010 19:16:12.635 [1cac]Vid/Ref : 229.569, Late ?-frame(00), Compensated = 0.080 ( 0.063 A/V buffers=00/81), Clk : 0.016998, State 2
03-02-2010 19:16:12.636 [1cac]Vid/Ref : 229.589, Late ?-frame(00), Compensated = 0.100 ( 0.083 A/V buffers=00/80), Clk : 0.016998, State 2
03-02-2010 19:16:12.637 [1cac]Vid/Ref : 229.529, Late ?-frame(00), Compensated = 0.040 ( 0.023 A/V buffers=00/79), Clk : 0.016998, State 2
03-02-2010 19:16:12.638 [1cac]Vid/Ref : 229.549, Late ?-frame(00), Compensated = 0.060 ( 0.043 A/V buffers=00/78), Clk : 0.016998, State 2
03-02-2010 19:16:12.639 [1278]Aud/Ref : 229.975, Late Compensated = 0.486 ( 0.469 A/V buffers=01/81), Clk : 0.016998, State 2
03-02-2010 19:16:12.648 [1cac]Vid/Ref : 229.609, Late ?-frame(00), Compensated = 0.120 ( 0.088 A/V buffers=00/85), Clk : 0.031998, State 2
03-02-2010 19:16:12.651 [1278]Aud/Ref : 230.167, Late Compensated = 0.678 ( 0.646 A/V buffers=01/85), Clk : 0.031998, State 2
03-02-2010 19:16:12.680 [1cac]Vid/Ref : 229.629, Late ?-frame(00), Compensated = 0.140 ( 0.069 A/V buffers=00/84), Clk : 0.070987, State 2
03-02-2010 19:16:12.697 [1cac]Vid/Ref : 229.809, Late ?-frame(00), Compensated = 0.320 ( 0.229 A/V buffers=00/92), Clk : 0.090982, State 2
03-02-2010 19:16:12.699 [1278]Aud/Ref : 230.335, Late Compensated = 0.846 ( 0.755 A/V buffers=01/92), Clk : 0.090982, State 2
03-02-2010 19:16:12.701 [1278]FileReader::Read() read to less bytes
03-02-2010 19:16:12.708 [1cac]Vid/Ref : 229.829, Late ?-frame(00), Compensated = 0.340 ( 0.249 A/V buffers=00/94), Clk : 0.090982, State 2
03-02-2010 19:16:12.710 [1cac]Vid/Ref : 229.729, Late ?-frame(00), Compensated = 0.240 ( 0.133 A/V buffers=00/93), Clk : 0.106982, State 2
03-02-2010 19:16:12.712 [1278]FileReader::Read() read to less bytes
03-02-2010 19:16:12.712 [1278]demux:endoffile

The trouble seems to be caused by (too) few I-frames in the stream, which causes the end of file to be reached. The only side-effect of the patch is that you will always be 2 more seconds from live point than current version, which should not be considered a real problem in my opinion, when compared to the bug that is solved. Patch got my vote.

 

[riksmith]

Perhaps the solution is not the 5 seconds, but perhaps the skip logic should take the i-frames into account. But that's not my area of expertise...

 

[Seidelin]

From my limited knowledge of TsReader, that would require huge changes which are out of the question, at least for RC1.

 

[elliottmc]

Hi,

We should still bear in mind the observation that the problem happens with a 3 second margin and does not with a 5 second margin. Since TsReader only 'guesses' the duration (at least partly), it may be worth accepting this fix.

Mark

 

[tourettes]

Hi,

We should still bear in mind the observation that the problem happens with a 3 second margin and does not with a 5 second margin. Since TsReader only 'guesses' the duration (at least partly), it may be worth accepting this fix.

Mark

With 5 seconds you might be seeing few seconds of the old channel when zapping. At least on some broadcasters it would be much more likely when there are 2 seconds more TS buffer content that is played.

 

[riksmith]

Deleted...

 

[disaster123]

AW: Skip to end on live recording sometimes stops playback

i just want to confirm that i've the same problem that sometimes the playback stops when skipping to end.