[gstreamer-bugs] [Bug 163159] [videobox] plugin segfault (gst-plugin 0.8.7)

Mon Jan 10 16:52:26 PST 2005

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 http://bugzilla.gnome.org/show_bug.cgi?id=163159
 GStreamer | gst-plugins | Ver: 0.8.8

------- Additional Comments From David Wm. Parr  2005-01-10 19:52 -------
Regarding stack trace (segmentation fault still exists - additional details
below): it turned out (as Benjamin Otte suggested), that I was debugging
./gst-launch from my build directory instead of ./.libs/lt-gst-launch-0.8. 
After I made that change, the stack trace came together.

The following was the back trace from debugging
'./tools/.libs/lt-gst-launch-0.8' off of my build directory.  

The segmentation fault occurred on the second video buffer in the ffmpeg avcodec
code within ffcolorspace plugin.  I am not familiar with whats going on here,
but my impression is that the media type 'video/x-raw-yuv' (videobox src) is
being converted to 'video/x-raw-rgb' (ximagesink sink).  As I assume that this
is a common conversion, I would guess (and that's all that it is) that the
problem would be in farther upstream in the pipeline (videobox plugin or
gstreamer main code).

(gdb) r
Starting program: /home/dparr/gst/gstreamer-0.8.8/tools/.libs/lt-gst-launch-0.8
filesrc location=/home/dparr/media.samples/MOV00053.MPG \! mpegdemux name=demux
demux.video_00\! mpeg2dec \! videobox left=-10 right=-10 top=-10 bottom=-10
fill=1 \! ffcolorspace \! ximagesink
[Thread debugging using libthread_db enabled]
[New Thread 1078454208 (LWP 18665)]
RUNNING pipeline ...

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1078454208 (LWP 18665)]
0x4063ade5 in yuv420p_to_rgba32 (dst=0x80a1bf8, src=0x80a1bd8, width=660, height=4)
    at imgconvert_template.h:43
43                  YUV_TO_RGB1_CCIR(cb_ptr[0], cr_ptr[0]);
(gdb) i threads
* 1 Thread 1078454208 (LWP 18665)  0x4063ade5 in yuv420p_to_rgba32
(dst=0x80a1bf8, src=0x80a1bd8, width=660,
    height=4) at imgconvert_template.h:43
(gdb) bt
#0  0x4063ade5 in yuv420p_to_rgba32 (dst=0x80a1bf8, src=0x80a1bd8, width=660,
height=4)
    at imgconvert_template.h:43
#1  0x4063ce15 in img_convert (dst=0x80a1bf8, dst_pix_fmt=6, src=0x80a1bd8,
src_pix_fmt=0, src_width=660,
    src_height=500) at imgconvert.c:1982
#2  0x4054a6c9 in gst_ffmpegcsp_chain (pad=0x80a16f8, data=0x8064db0) at
gstffmpegcolorspace.c:374
#3  0x4005cb97 in gst_pad_call_chain_function (pad=0x80a16f8, data=0x8064db0) at
gstpad.c:4430
#4  0x40058e7d in gst_pad_push (pad=0x83b92b8, data=0x8064db0) at gstpad.c:3241
#5  0x4052fef0 in gst_video_box_chain (pad=0x83b8ff8, _data=0x8064e98) at
gstvideobox.c:699
#6  0x4005cb97 in gst_pad_call_chain_function (pad=0x83b8ff8, data=0x8064e98) at
gstpad.c:4430
#7  0x40058e7d in gst_pad_push (pad=0x83b7a00, data=0x8064e98) at gstpad.c:3241
#8  0x4050f69b in gst_mpeg2dec_chain (pad=0x83b7938, _data=0x8065150) at
gstmpeg2dec.c:773
#9  0x4005cb97 in gst_pad_call_chain_function (pad=0x83b7938, data=0x8065150) at
gstpad.c:4430
#10 0x40058e7d in gst_pad_push (pad=0x83ab240, data=0x8065150) at gstpad.c:3241
#11 0x404f6f22 in gst_mpeg_demux_send_subbuffer (mpeg_demux=0x83b5c20,
outstream=0x80a6bf0,
    buffer=0x80650dc, timestamp=270000000, offset=12, size=19177) at
gstmpegdemux.c:928
#12 0x404f6158 in gst_mpeg_demux_parse_packet (mpeg_parse=0x83b5c20,
buffer=0x80650dc) at gstmpegdemux.c:763
#13 0x404f1b45 in gst_mpeg_parse_loop (element=0x83b5c20) at gstmpegparse.c:530
#14 0x407eeeca in loop_group_schedule_function (argc=0, argv=0x80a2c98) at
gstoptimalscheduler.c:1332
#15 0x407ee703 in schedule_group (group=0x80a2c98) at gstoptimalscheduler.c:1154
#16 0x407ee8a3 in gst_opt_scheduler_schedule_run_queue (osched=0x80a0520,
only_group=0x0)
    at gstoptimalscheduler.c:1205
#17 0x407eeaea in schedule_chain (chain=0x80a2c78) at gstoptimalscheduler.c:1258
#18 0x407f2605 in gst_opt_scheduler_iterate (sched=0x80a0520) at
gstoptimalscheduler.c:2629
#19 0x40066fd2 in gst_scheduler_iterate (sched=0x80a0520) at gstscheduler.c:738
#20 0x400325cc in gst_bin_iterate_func (bin=0x809ffb0) at gstbin.c:1220
#21 0x4008198d in gst_marshal_BOOLEAN__VOID (closure=0x8059e28,
return_value=0xbfffedc0, n_param_values=1,
    param_values=0xbfffef00, invocation_hint=0xbfffede8,
marshal_data=0x40032566) at gstmarshal.c:509
#22 0x40282d5d in g_cclosure_new_swap () from /usr/lib/libgobject-2.0.so.0
#23 0x08059e28 in ?? ()
#24 0xbfffedc0 in ?? ()
#25 0x00000001 in ?? ()
#26 0xbfffef00 in ?? ()
#27 0xbfffede8 in ?? ()
#28 0x40032566 in gst_bin_restore_thyself (object=0x8057438, self=0x8059d90) at
gstbin.c:1204
Previous frame inner to this frame (corrupt stack?)
(gdb)

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