Date: Mon, 06 Jun 2005 16:03:19 +0200 From: "=?iso-8859-15?Q?Jos=E9?= M. =?iso-8859-15?Q?Fandi=F1o?=" <freebsd@fadesa.es> To: FreeBSD-multimedia@FreeBSD.org Subject: debugging transcode Message-ID: <42A457A7.95A86273@fadesa.es>
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Hello,
I was trying to convert a nuppelvideo stream to a more usable format,
but transcode causes a segfault whith it. Running several tests it seems
a problem with the audio processing of nuv files because "-x nuv,null"
works and "-x nuv" doesn't.
It's FreeBSD 5.4-RELEASE and transcode 1.0.0b3 from ports.
> tcprobe -i dtv.nuv
[tcprobe] NuppelVideo stream
[tcprobe] summary for dtv.nuv, (*) = not default, 0 = not detected
import frame size: -g 768x576 [720x576] (*)
frame rate: -f 25.000 [25.000] frc=0
audio track: -a 0 [0] -e 44100,16,2 [48000,16,2] -n 0x1 [0x2000] (*)
I was told by the transcode developers to get the cause of the segfault,
since I'm not a programmer it's a little hard to me debug this.
Until now I was able to get some stuff:
> gdb /usr/local/bin/transcode ./transcode.core
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
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This GDB was configured as "i386-marcel-freebsd"...
Core was generated by `transcode'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /usr/local/lib/libiconv.so.3...done.
Loaded symbols for /usr/local/lib/libiconv.so.3
Reading symbols from /lib/libm.so.3...done.
Loaded symbols for /lib/libm.so.3
Reading symbols from /lib/libz.so.2...done.
Loaded symbols for /lib/libz.so.2
Reading symbols from /usr/local/lib/libxml2.so.5...done.
Loaded symbols for /usr/local/lib/libxml2.so.5
Reading symbols from /usr/lib/libpthread.so.1...done.
Loaded symbols for /usr/lib/libpthread.so.1
Reading symbols from /lib/libc.so.5...done.
Loaded symbols for /lib/libc.so.5
Reading symbols from /usr/local/lib/transcode/import_nuv.so...done.
Loaded symbols for /usr/local/lib/transcode/import_nuv.so
Reading symbols from /usr/local/lib/transcode/export_lame.so...done.
Loaded symbols for /usr/local/lib/transcode/export_lame.so
Reading symbols from /usr/local/lib/transcode/export_ffmpeg.so...done.
Loaded symbols for /usr/local/lib/transcode/export_ffmpeg.so
Reading symbols from /usr/local/lib/libmp3lame.so.0...done.
Loaded symbols for /usr/local/lib/libmp3lame.so.0
Reading symbols from /usr/local/lib/libavcodec.so...done.
Loaded symbols for /usr/local/lib/libavcodec.so
Reading symbols from /usr/local/lib/libfaac.so.0...done.
Loaded symbols for /usr/local/lib/libfaac.so.0
Reading symbols from /usr/local/lib/libvorbis.so.3...done.
Loaded symbols for /usr/local/lib/libvorbis.so.3
Reading symbols from /usr/local/lib/libvorbisenc.so.2...done.
Loaded symbols for /usr/local/lib/libvorbisenc.so.2
Reading symbols from /usr/lib/libstdc++.so.4...done.
Loaded symbols for /usr/lib/libstdc++.so.4
Reading symbols from /usr/local/lib/libmp4v2.so.0...done.
Loaded symbols for /usr/local/lib/libmp4v2.so.0
Reading symbols from /usr/local/lib/libogg.so.5...done.
Loaded symbols for /usr/local/lib/libogg.so.5
Reading symbols from /libexec/ld-elf.so.1...done.
Loaded symbols for /libexec/ld-elf.so.1
#0 0x282ec3cb in kse_thr_interrupt () at kse_thr_interrupt.S:2
2 RSYSCALL(kse_thr_interrupt)
(gdb)
(gdb) where full
#0 0x282ec3cb in kse_thr_interrupt () at kse_thr_interrupt.S:2
No locals.
#1 0x282db340 in sig_daemon (arg=0x0) at /usr/varios/src/lib/libpthread/thread/thr_sig.c:214
i = 129
ts = {tv_sec = 30, tv_nsec = 0}
set = {__bits = {0, 0, 0, 0}}
curkse = (struct kse *) 0x80a0100
#2 0x282e49b2 in kse_sched_single (kmbx=0x17f) at /usr/varios/src/lib/libpthread/thread/thr_kern.c:883
curkse = (struct kse *) 0x80a0100
curthread = (struct pthread *) 0x80a6200
ts = {tv_sec = 0, tv_nsec = 0}
sigmask = {__bits = {0, 0, 0, 0}}
i = 134897664
sigseqno = 0
level = 383
first = 1
#3 0x00000000 in ?? ()
No symbol table info available.
thread number 2 is suspicious:
(gdb) info threads
* 8 LWP 100183 0x282ec3cb in kse_thr_interrupt () at kse_thr_interrupt.S:2
7 Thread 7 (runnable) avi_update_header (AVI=0xa43d000) at avilib.c:823
6 Thread 6 (LWP 100155) 0x282ec3ab in kse_release () at kse_release.S:2
5 Thread 5 (sleeping) 0x282e42b7 in _thr_sched_switch_unlocked (curthread=0x80a6400) at pthread_md.h:232
4 Thread 4 (sleeping) 0x282e42b7 in _thr_sched_switch_unlocked (curthread=0x80a6600) at pthread_md.h:232
3 Thread 3 (sleeping) 0x282e42b7 in _thr_sched_switch_unlocked (curthread=0x80a6800) at pthread_md.h:232
2 Thread 2 (runnable) 0x283dfc08 in resample_flow (flowi=0x284616c0 "", isamp=1764, flowo=0x284de6c0 "") at resample.c:866
1 Thread 1 (runnable) _ctx_start () at /usr/varios/src/lib/libc/i386/gen/_ctx_start.S:42
(gdb) thread 2
[Switching to thread 2 (Thread 2 (runnable))]#0 0x283dfc08 in resample_flow (flowi=0x284616c0 "", isamp=1764, flowo=0x284de6c0 "")
at resample.c:866
866 {
Current language: auto; currently c
(gdb) info args
flowi = 0x284616c0 ""
isamp = 1764
flowo = 0x284de6c0 ""
(gdb) l resample.c:864,890
864
865 int resample_flow(char *flowi, int isamp, char *flowo)
866 {
867 short *wordp, *iword, *oword;
868 LONG irbuf[MY_BUFSIZE/2];
869 LONG ilbuf[MY_BUFSIZE/2];
870 int osamp, osampdef, i;
871
872 iword=(short *)flowi;
873 oword=(short *)flowo;
874 osampdef=reffp->outinfo.rate>>2;
875 wordp=iword;
876 for (i=0; i<isamp; i++) {
877 irbuf[i]=(((LONG)wordp[i*2])<<16);
878 ilbuf[i]=(((LONG)wordp[i*2+1])<<16);
879 }
880 osamp=osampdef;
881 st_resample_flow(reffp, &irbuf, reffp->obuf, &isamp, &osamp);
882 osamp=osampdef;
883 st_resample_flow(leffp, &ilbuf, leffp->obuf, &isamp, &osamp);
884 wordp=oword;
885 for (i=0; i<osamp; i++) {
886 wordp[i*2]=(int)(reffp->obuf[i]>>16);
887 wordp[i*2+1]=(int)(leffp->obuf[i]>>16);
888 }
889 return(osamp);
890 }
well, now I'm not sure about that I must to do.
perhaps some experienced member of the list can tell me which is the next step.
Thank you.
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