[CRASH] mythtranscode segfault

[gmembre@…]

Mythtranscode segfault on 1/4 of my recordings. In 0.21, I had a segfault on less than 5% of my recordings.

mythtv_backtrace.txt contains the back trace of the problem
mythtranscode.txt contains the full log of mythtranscode running

[gmembre@…]

backtrace

[gmembre@…]

mythtranscode log part 1

[gmembre@…]

mythtranscode log part 2

[gmembre@…]

mythtranscode log part 3

[Stuart Auchterlonie]

This is dying in put_pixels8_mmx which is part of ffmpeg and implemented completed in ASM. You might be lucky that this will be fixed after the ffmpeg resync, but looking at the current ffmpeg sync patchset this function remains unchanged, so i doubt that a resync will fix the problem.

[robertm]

Milestoning to unknown, we can infoneed post-ffmpeg-sync.

[beirdo]

Is this still the case after this last ffmpeg resync?

[gmembre@…]

Hello

I made a new test this morning with dca8767 and nothing plays at all. Transcoding my file with a seektable doesn't do anything :

$ gdb mythtranscode -c /mnt/big2/tmp/core.mythtranscode 2>&1 | tee mythtv_transcode.txt
GNU gdb (GDB) 7.0.1-debian
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i486-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/mythtranscode...done.
/mnt/big2/tmp/core.mythtranscode: No such file or directory.
(gdb) set pagination off
(gdb) thread apply all bt
(gdb) run -v most -i /mnt/big2/tmp/transcode/in/Capital\ -\ 2011-01-23,\ 20-34\ -\ Emploi,\ qualite\ de\ vie\ -\ ameliorer\ son\ quotidien,\ c\ est\ possible.nuv -o /mnt/big2/tmp/transcode/transcode/Capital\ -\ 2011-01-23,\ 20-34\ -\ Emploi,\ qualite\ de\ vie\ -\ ameliorer\ son\ quotidien,\ c\ est\ possible.nuv -p 27 -V 16777217 -l 124585,151894-158013,164005-
Starting program: /usr/bin/mythtranscode -v most -i /mnt/big2/tmp/transcode/in/Capital\ -\ 2011-01-23,\ 20-34\ -\ Emploi,\ qualite\ de\ vie\ -\ ameliorer\ son\ quotidien,\ c\ est\ possible.nuv -o /mnt/big2/tmp/transcode/transcode/Capital\ -\ 2011-01-23,\ 20-34\ -\ Emploi,\ qualite\ de\ vie\ -\ ameliorer\ son\ quotidien,\ c\ est\ possible.nuv -p 27 -V 16777217 -l 124585,151894-158013,164005-
[Thread debugging using libthread_db enabled]
Cutting from: 0 to: 0
2011-02-19 10:32:34.302 Using runtime prefix = /usr
2011-02-19 10:32:34.302 Using configuration directory = /home/mythtv/.mythtv
2011-02-19 10:32:34.303 Empty LocalHostName.
[New Thread 0x46c4db70 (LWP 28635)]
[Thread 0x46c4db70 (LWP 28635) exited]
2011-02-19 10:32:34.341 New DB connection, total: 1
2011-02-19 10:32:34.382 Closing DB connection named 'DBManager0'
2011-02-19 10:32:34.415 Enabled verbose msgs: most
2011-02-19 10:32:34.602 New DB connection, total: 2
2011-02-19 10:32:34.609 New DB connection, total: 3
2011-02-19 10:32:34.675 Using protocol version 63
[mpeg4 @ 0x8176610] removing common factors from framerate
[New Thread 0x46c4db70 (LWP 28636)]
[New Thread 0x47374b70 (LWP 28637)]
[New Thread 0x4780bb70 (LWP 28638)]
[New Thread 0x47a0cb70 (LWP 28639)]
[New Thread 0x4915ab70 (LWP 28640)]
[Thread 0x4915ab70 (LWP 28640) exited]
[Thread 0x46c4db70 (LWP 28636) exited]
[Thread 0x47374b70 (LWP 28637) exited]
[Thread 0x4780bb70 (LWP 28638) exited]
[Thread 0x47a0cb70 (LWP 28639) exited]

Program exited normally.

Something wrong with this update :( I'll go through the mailling list.

[gmembre@…]

Sorry for the noise : my cutlist was wrong (missing 0- at the beginning) and I make a new clean compilation of mythtv : I can play my recordings again. Besides mythtranscode doesn't segfault any more, so the problem seems to be resolved. I'm using the following version :

MythTV Version   : v0.24-184-gdca8767
MythTV Branch    : fixes/0.24
Network Protocol : 63
Library API      : 0.24.20101129-1
QT Version       : 4.6.3

Thanks a lot for your help !

[sphery]

Fixed by recent changes.

Thanks for reporting back.