[mythtv-commits] Ticket #12010: mythcommflag --rebuild does not re-create good seektables with h264 recordings

MythTV noreply at mythtv.org
Fri Jan 23 11:06:38 UTC 2015


#12010: mythcommflag --rebuild does not re-create good seektables with h264
recordings
-----------------------------------------+----------------------------
 Reporter:  J.Pilk@…                     |          Owner:  stichnot
     Type:  Bug Report - General         |         Status:  accepted
 Priority:  minor                        |      Milestone:  unknown
Component:  MythTV - Video Decoding      |        Version:  0.27-fixes
 Severity:  medium                       |     Resolution:
 Keywords:  mythcommflag --rebuild h264  |  Ticket locked:  0
-----------------------------------------+----------------------------

Comment (by John Pilkington <J.Pilk@…>):

 When I opened this ticket, the problem was that mythcommflag --rebuild in
 fixes did not find most of the original keyframes.  Recently I've been
 running master with the patch attached earlier;  I make few HD recordings,
 but it has seemed to do the job.

 I now find that in current builds of 0.27-fixes almost all of the original
 keyframes are found, at the same byte-offsets, but the frame-numbers and
 timestamps drift gradually away from their original values; over a 1-hour
 recording the rebuilt table shows 48 fewer frames and a duration 1920 ms
 less.

 wc -l *.xml shows 6487 lines originally, 6478 after the rebuild.  It looks
 as if keyframe detection has been fixed somehow, but frame counting is -
 literally - adrift.

 This was a DVB-T2 recording from BBC FOUR HD

--
Ticket URL: <https://code.mythtv.org/trac/ticket/12010#comment:9>
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