[MPlayer-dev-eng] [bug] another ratecontrol issue
Moritz Bunkus
moritz at bunkus.org
Thu Oct 31 00:17:53 CET 2002
Hi.
> also tell us the exact commands you used to proeuce the crash
>
> > mencoder -v -nosound -ovc lavc \
> > -lavcopts vcodec=mpeg4:vbitrate=700:vhq:vqmin=2:vpass=1 \
> > -vop scale=320:240 \
> > -o /dev/null charmed.504-short.mpg
>
> same now?
Yes, I only alter the mencoder binary (switching between pre9 from the
Debian packages, pre9 self compiled with debug options, today's CVS,
today's CVS with debug options...).
> you should include gdb log (backtrace, no need to disasm) here, too
I read and obey :)
[bt for 0.9pre9 !!]
mencoder: ratecontrol.c:635: ff_rate_estimate_qscale: Assertion >0.0' failed.14 D/B/S 0/1/0
Program received signal SIGABRT, Aborted.
[Switching to Thread 16384 (LWP 32613)]
0x40b78c01 in kill () from /lib/libc.so.6
(gdb) bt
#0 0x40b78c01 in kill () from /lib/libc.so.6
#1 0x4004d98b in pthread_kill () from /lib/libpthread.so.0
#2 0x4004dcab in raise () from /lib/libpthread.so.0
#3 0x40b79c3e in abort () from /lib/libc.so.6
#4 0x40b72b11 in __assert_fail () from /lib/libc.so.6
#5 0x0818e907 in ff_rate_estimate_qscale (s=0x83be430) at ratecontrol.c:635
#6 0x0814055c in encode_picture (s=0x83be430, picture_number=7173) at mpegvideo.c:2591
#7 0x0813363a in MPV_encode_picture (avctx=0x83b0b00, buf=0x41064008 "", buf_size=2097152, data=0xbfffe040) at mpegvideo.c:983
#8 0x08130893 in avcodec_encode_video (avctx=0x83b0b00, buf=0x41064008 "", buf_size=2097152, pict=0xbfffe040) at utils.c:122
#9 0x0806b4fc in put_image (vf=0x83b0ab8, mpi=0x83b01b8) at ve_lavc.c:485
#10 0x0807c561 in vf_next_put_image (vf=0x83b0ea8, mpi=0x83b01b8) at vf.c:368
#11 0x0807d776 in put_image (vf=0x83b0ea8, mpi=0x83b0150) at vf_expand.c:262
#12 0x0807c561 in vf_next_put_image (vf=0x83b0ef0, mpi=0x83b0150) at vf.c:368
#13 0x0807e141 in put_image (vf=0x83b0ef0, mpi=0x83b00e8) at vf_scale.c:217
#14 0x08070d60 in decode_video (sh_video=0x835ab40, start=0x40f63008 "", in_size=3924, drop_frame=0) at dec_video.c:289
#15 0x0804fdd2 in main (argc=12, argv=0xbffff5a4) at mencoder.c:1018
> please show register dump too (esp. the value of eax, edx, esi) and if you
> can, the value of vf, vf->pri as well
Sure:
[dump for today's CVS !!]
0x0807e399 in config (vf=0x830d298, width=352, height=240, d_width=352, d_height=264, flags=0, outfmt=842094169) at vf_scale.c:154
154 vf->priv->ctx=getSwsContext(width,height,
(gdb) p vf
$1 = (struct vf_instance_s *) 0x830d298
(gdb) p *vf
$2 = {info = 0x836e898, config = 0x836e898, control = 0x1df3b8c6, query_format = 0x39, get_image = 0x40c6084c <errno+3052>,
put_image = 0x40c6084c <errno+3052>, draw_slice = 0xf4724260, uninit = 0x3fefdb70, default_caps = 2375595106,
default_reqs = 1067482368, imgctx = {static_images = {0xace3f8d7, 0xbf843566}, temp_images = {0x0}, export_images = {0x11},
static_idx = 137801240}, next = 0x830d040, priv = 0x38}
(gdb) p *vf->priv
Cannot access memory at address 0x38
(gdb) info registers
eax 0x38 56
ecx 0x0 0
edx 0x8363cc0 137772224
ebx 0xf0 240
esp 0xbfffdfe0 0xbfffdfe0
ebp 0xbfffe048 0xbfffe048
esi 0x830d298 137417368
edi 0x160 352
eip 0x807e399 0x807e399
eflags 0x10297 66199
cs 0x23 35
ss 0x2b 43
ds 0x2b 43
es 0x2b 43
fs 0x0 0
gs 0x0 0
fctrl 0x37f 895
fstat 0x20 32
ftag 0xffff 65535
fiseg 0x0 0
fioff 0x0 0
foseg 0x0 0
fooff 0x0 0
fop 0x0 0
mxcsr 0x1f80 8064
orig_eax 0xffffffff -1
One thing I just found out aditionally: if I leave out the rescaling
then no segfault happens at all (of course not in vf_scale.c, but
nowhere else just like with 0.9pre9).
--
==> Ciao, Mosu (Moritz Bunkus)
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