Opened 6 years ago

Last modified 6 years ago

#11858 new Bug Report - General

when you cut the beginning of your recording, myth doesn't play its audio

Reported by: Karl Egly Owned by: Karl Egly
Priority: minor Milestone: unknown
Component: MythTV - Mythtranscode Version: Master Head
Severity: medium Keywords:
Cc: gnassas@… Ticket locked: no

Description

Salvaging from http://www.mythtv.org/pipermail/mythtv-users/2013-September/353324.html so this does not get lost.

I do lossless transcoding all the time and it's reliable now. There is an issue where, when you cut the beginning of your recording, myth doesn't play its audio but I haven't checked if that's a bug in transcode or myth playback.

Change History (8)

comment:1 Changed 6 years ago by Karl Egly

Cc: gnassas@… added; George Nassas <gnassas@…> removed

comment:2 Changed 6 years ago by Raymond Wagner

Is this possibly related to #11213?

comment:3 Changed 6 years ago by dekarl@…

I found a channel where I can reproduce this behavior with latest master. The log from mythtranscode contains some lines which it did not contain for the other samples.

I CoreContext mpeg2fix.cpp:77 (my_av_print) Invalid extradata, subtitle streams may be combined!
I CoreContext mpeg2fix.cpp:77 (my_av_print) max_analyze_duration 5000000 reached at 5024000 microseconds
I CoreContext mpeg2fix.cpp:77 (my_av_print) start time is not set in estimate_timings_from_pts

Mythfrontend writes a line about audio sync being off by 12345678 ms (5 digit seconds) when starting playback. Could be related to #11213, but the example contains a 5.1 AC3 track which would not have worked in fixes/0.26 until some months ago, see ticket:2077#comment:42

comment:4 Changed 6 years ago by pc-mythtvcode@…

There is a report on the list that the patches from ticket #11639 solve this issue.

comment:5 in reply to:  4 Changed 6 years ago by Karl Egly

Replying to pc-mythtvcode@…:

There is a report on the list that the patches from ticket #11639 solve this issue.

can you provide a link to "the list" or even better to the report? I'm not seeing one at http://www.mythtv.org/pipermail/mythtv-users/2013-October/date.html

comment:7 Changed 6 years ago by pc-mythtvcode@…

This is the email that I was referring to above:

http://www.gossamer-threads.com/lists/mythtv/users/555170#555170

comment:8 Changed 6 years ago by Karl Egly

After reviewing the patch, and judging by how hard the original issue was to reproduce for me, this report appears to be a false positive. (taking correlation for causation) The patch from ticket:11639#comment:13 only touches the lossy re-encode with cut list which is not the topic of any of the tickets but an entirely different issue...

Note: See TracTickets for help on using tickets.