I have a crash under similar conditions, which makes me assume it is the same
bug. I ran k3b's command (slightly modified) from the command line and got a
backtrace:
$ /usr/bin/transcode --nice 19 --progress_meter 2 --progress_rate 303 -i
/dev/sr0 -x \
dvd -T 2,-1,1 -a 0 -j 0,0,0,0 -R 1,/tmp/kde-reini/k3b_0.log -y ffmpeg,null -o
/dev/null \
-F mpeg4 -w 1200 -Z 768x576
[...]
*** Error in `/usr/bin/transcode': free(): invalid pointer: 0x7f8077c80a35
***
=== Backtrace: =
/lib/x86_64-linux-gnu/libc.so.6(+0x7aa26)[0x7f808abe5a26]
/lib/x86_64-linux-gnu/libc.so.6(+0x7b7a3)[0x7f808abe67a3]
/usr/lib/x86_64-linux-gnu/libavutil.so.51(av_freep+0xc)[0x7f8076952c7c]
/usr/lib/x86_64-linux-gnu/libavutil.so.51(av_opt_free+0x3c)[0x7f807695330c]
/usr/lib/x86_64-linux-gnu/libavcodec.so.53(avcodec_close+0xf3)[0x7f8076e473d8]
/usr/lib/transcode/export_ffmpeg.so(tc_export+0x4d6)[0x7f8077c7c696]
/usr/bin/transcode(tcv_export+0x23)[0x412a53]
/usr/bin/transcode(tc_encoder_stop+0x9b)[0x413ceb]
/usr/bin/transcode(main+0x3fdf)[0x40c06f]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5)[0x7f808ab8c995]
/usr/bin/transcode[0x40cc69]
=== Memory map:
0040-00454000 r-xp 08:06 1393038
/usr/bin/transcode
00654000-00655000 r--p 00054000 08:06 1393038
/usr/bin/transcode
00655000-00658000 rw-p 00055000 08:06 1393038
/usr/bin/transcode
00658000-0067 rw-p 00:00 0
02506000-0277b000 rw-p 00:00 0 [heap]
7f805c00-7f805c021000 rw-p 00:00 0
7f805c021000-7f806000 ---p 00:00 0
7f806400-7f8064024000 rw-p 00:00 0
7f8064024000-7f806800 ---p 00:00 0
7f806800-7f80680aa000 rw-p 00:00 0
7f80680aa000-7f806c00 ---p 00:00 0
7f806c00-7f806c021000 rw-p 00:00 0
7f806c021000-7f807000 ---p 00:00 0
7f8070ae4000-7f8070ae5000 ---p 00:00 0
7f8070ae5000-7f80712e5000 rw-p 00:00 0
7f80712e5000-7f80712e6000 ---p 00:00 0
7f80712e6000-7f8071ae6000 rw-p 00:00 0
7f8071ae6000-7f8071af2000 r-xp 08:06 58043
/lib/x86_64-linux-gnu/libnss_files-2.17.so
7f8071af2000-7f8071cf1000 ---p c000 08:06 58043
/lib/x86_64-linux-gnu/libnss_files-2.17.so
7f8071cf1000-7f8071cf2000 r--p b000 08:06 58043
/lib/x86_64-linux-gnu/libnss_files-2.17.so
7f8071cf2000-7f8071cf3000 rw-p c000 08:06 58043
/lib/x86_64-linux-gnu/libnss_files-2.17.so
7f8071cf3000-7f8071cfd000 r-xp 08:06 58045
/lib/x86_64-linux-gnu/libnss_nis-2.17.so
7f8071cfd000-7f8071efc000 ---p a000 08:06 58045
/lib/x86_64-linux-gnu/libnss_nis-2.17.so
7f8071efc000-7f8071efd000 r--p 9000 08:06 58045
/lib/x86_64-linux-gnu/libnss_nis-2.17.so
7f8071efd000-7f8071efe000 rw-p a000 08:06 58045
/lib/x86_64-linux-gnu/libnss_nis-2.17.so
7f8071efe000-7f8071f13000 r-xp 08:06 58040
/lib/x86_64-linux-gnu/libnsl-2.17.so
7f8071f13000-7f8072112000 ---p 00015000 08:06 58040
/lib/x86_64-linux-gnu/libnsl-2.17.so
7f8072112000-7f8072113000 r--p 00014000 08:06 58040
/lib/x86_64-linux-gnu/libnsl-2.17.so
7f8072113000-7f8072114000 rw-p 00015000 08:06 58040
/lib/x86_64-linux-gnu/libnsl-2.17.so
7f8072114000-7f8072116000 rw-p 00:00 0
7f8072116000-7f807211d000 r-xp 08:06 58041
/lib/x86_64-linux-gnu/libnss_compat-2.17.so
7f807211d000-7f807231c000 ---p 7000 08:06 58041
/lib/x86_64-linux-gnu/libnss_compat-2.17.so
7f807231c000-7f807231d000 r--p 6000 08:06 58041
/lib/x86_64-linux-gnu/libnss_compat-2.17.so
7f807231d000-7f807231e000 rw-p 7000 08:06 58041
/lib/x86_64-linux-gnu/libnss_compat-2.17.so
7f807231e000-7f8072326000 r-xp 08:06 8682
/usr/lib/libdvdcss.so.2.1.0
7f8072326000-7f8072525000 ---p 8000 08:06 8682
/usr/lib/libdvdcss.so.2.1.0
7f8072525000-7f8072526000 r--p 7000 08:06 8682
/usr/lib/libdvdcss.so.2.1.0
7f8072526000-7f8072527000 rw-p 8000 08:06 8682
/usr/lib/libdvdcss.so.2.1.0
7f8072527000-7f8072528000 ---p 00:00 0
7f8072528000-7f8072d28000 rw-p 00:00 0
7f8072d28000-7f8072d29000 ---p 00:00 0
7f8072d29000-7f8073529000 rw-p 00:00 0
7f8073529000-7f807352a000 ---p 00:00 0
7f807352a000-7f8073d2a000 rw-p 00:00 0
[stack:30434]
7f8073d2a000-7f8073d4 r-xp 08:06 57903
/lib/x86_64-linux-gnu/libgcc_s.so.1
7f8073d4-7f8073f3f000 ---p 00016000 08:06 57903
