[mythtv-commits] Ticket #11144: mythcommflag --rebuild and --video creates invalid keyframe "mark" values

MythTV noreply at mythtv.org
Wed Oct 31 19:38:28 UTC 2012

#11144: mythcommflag --rebuild and --video creates invalid keyframe "mark" values
 Reporter:  r.d.vaughan@…                  |          Owner:  cpinkham
     Type:  Bug Report - General           |         Status:  new
 Priority:  minor                          |      Milestone:  unknown
Component:  MythTV - Mythcommflag          |        Version:  0.25-fixes
 Severity:  medium                         |     Resolution:
 Keywords:  keyframe mythcommflag rebuild  |  Ticket locked:  0

Comment (by blm-ubunet@…):

 My recordings are from dvb-t & are AVC with intra-refresh (no IDR).
 I observe the seektable offset (from binary byte offset cutting etc) to be
 related to the difference in audio pkt PTS & video pkt PTS.
 Is MythTV using the audio PTS as the timecode?

 Graphing the first hundred or so (mark,offset) from (recordedseek) as
 incremental diffs shows the first 2-3 to be abnormal.

 Confirming what the keyframes are (& where they are) is problematic.
 ffprobe reports no keyframes.
 Avidemux shows no keyframes but can count/decode/display frames.

Ticket URL: <http://code.mythtv.org/trac/ticket/11144#comment:2>
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