[gstreamer-bugs] [Bug 448948] New: jukebox.py doesn't work anymore

Mon Jun 18 16:13:36 PDT 2007

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  GStreamer | gst-python | Ver: HEAD CVS
           Summary: jukebox.py doesn't work anymore
           Product: GStreamer
           Version: HEAD CVS
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-python
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: thomas at apestaart.org
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: Unspecified
   GNOME milestone: Unspecified

Edward ported it to 0.10 at some point and it worked then.

When I try it now I get:

parsing output pipeline alsasink
Going into main loop
(long pause)
prerolled
setting pipeline to PLAYING
set pipeline to PLAYING
Segmentation fault
[root at davedina ~]# 

or sometimes

I get assertion failures on pads.

After updating gstreamer core and -python so that I would have debug symbols, I
get this backtrace:

(gdb) bt
#0  0x00000035c62ba2ad in visit_decref (op=0x61fce0, data=0x0)
    at Modules/gcmodule.c:269
#1  0x00000035c624a5a5 in frame_traverse (f=0x66dac0, 
    visit=0x35c62ba2a0 <visit_decref>, arg=0x0) at Objects/frameobject.c:429
#2  0x00000035c62ba817 in collect (generation=0) at Modules/gcmodule.c:294
#3  0x00000035c62bb09e in _PyObject_GC_Malloc (basicsize=<value optimized out>)
    at Modules/gcmodule.c:872
#4  0x00000035c62bb10d in _PyObject_GC_New (tp=0x35c6509ee0)
    at Modules/gcmodule.c:1273
#5  0x00000035c625292e in list_iter (seq=0x2aaab014a170)
    at Objects/listobject.c:2725
#6  0x00000035c6236f0f in PyObject_GetIter (o=0x2aaab014a170)
    at Objects/abstract.c:2228
#7  0x00000035c6288d76 in builtin_zip (self=<value optimized out>, 
    args=0x2aaaae0df730) at Python/bltinmodule.c:2045
#8  0x00000035c62950a8 in PyEval_EvalFrame (f=0x66dac0) at Python/ceval.c:3568
#9  0x00000035c6295e50 in PyEval_EvalCodeEx (co=0x2aaaae0de030, 
    globals=<value optimized out>, locals=<value optimized out>, 
    args=0x2aaab24f1728, argcount=2, kws=0x0, kwcount=0, defs=0x0, defcount=0, 
    closure=0x0) at Python/ceval.c:2741
#10 0x00000035c624c603 in function_call (func=0x2aaaae0a0c08, 
    arg=0x2aaab24f1710, kw=0x0) at Objects/funcobject.c:548
#11 0x00000035c6236140 in PyObject_Call (func=0x61fce0, arg=0x0, kw=0x0)
---Type <return> to continue, or q <return> to quit---
    at Objects/abstract.c:1795
#12 0x00000035c623c22f in instancemethod_call (func=<value optimized out>, 
    arg=0x2aaab24f1710, kw=0x0) at Objects/classobject.c:2532
#13 0x00000035c6236140 in PyObject_Call (func=0x61fce0, arg=0x0, kw=0x0)
    at Objects/abstract.c:1795
#14 0x00000035c628fa6d in PyEval_CallObjectWithKeywords (func=0x2aaab014b5a0, 
    arg=0x2aaab0148490, kw=0x0) at Python/ceval.c:3435
#15 0x00002aaaaed74701 in pygst_exceptions_register_classes ()
   from /usr/lib64/python2.4/site-packages/gst-0.10/gst/_gst.so
#16 0x00002aaaaf822568 in bin_bus_handler (bus=<value optimized out>, 
    message=0xbee260, bin=0x0) at gstbin.c:2409
#17 0x00002aaaaf829c27 in gst_bus_post (bus=0x80f660, message=0xbee260)
    at gstbus.c:349
#18 0x00002aaaaf831fc5 in gst_element_post_message (element=0x85ab90, 
    message=0xbee260) at gstelement.c:1512
#19 0x00002aaab1473138 in gst_level_transform_ip (trans=<value optimized out>, 
    in=0x8af820) at gstlevel.c:568
#20 0x00002aaaaf5eb0d8 in gst_base_transform_handle_buffer (trans=0x85ab90, 
    inbuf=0x8af820, outbuf=0x409ff758) at gstbasetransform.c:1419
#21 0x00002aaaaf5ebfd8 in gst_base_transform_chain (pad=<value optimized out>, 
    buffer=0x8af820) at gstbasetransform.c:1584
#22 0x00002aaaaf8483e9 in gst_pad_chain_unchecked (pad=0xbc7a10, 
    buffer=0x8af820) at gstpad.c:3451
---Type <return> to continue, or q <return> to quit---
#23 0x00002aaaaf848a5a in gst_pad_push (pad=0xbc5720, buffer=0x8af820)
    at gstpad.c:3617
#24 0x00002aaaaf8483e9 in gst_pad_chain_unchecked (pad=0xbc64d0, 
    buffer=0x8af820) at gstpad.c:3451
#25 0x00002aaaaf848a5a in gst_pad_push (pad=0xbc75c0, buffer=0x8af820)
    at gstpad.c:3617
#26 0x00002aaaaf5ec02b in gst_base_transform_chain (pad=<value optimized out>, 
    buffer=0x8af820) at gstbasetransform.c:1604
#27 0x00002aaaaf8483e9 in gst_pad_chain_unchecked (pad=0xbc7450, 
    buffer=0x8af820) at gstpad.c:3451
#28 0x00002aaaaf848a5a in gst_pad_push (pad=0xbc78a0, buffer=0x8af820)
    at gstpad.c:3617
#29 0x00002aaaaf5ec02b in gst_base_transform_chain (pad=<value optimized out>, 
    buffer=0x8af820) at gstbasetransform.c:1604
#30 0x00002aaaaf8483e9 in gst_pad_chain_unchecked (pad=0xbc7730, 
    buffer=0x8af820) at gstpad.c:3451
#31 0x00002aaaaf848a5a in gst_pad_push (pad=0xbc72e0, buffer=0x8af820)
    at gstpad.c:3617
#32 0x00002aaaaf5ec02b in gst_base_transform_chain (pad=<value optimized out>, 
    buffer=0x8af820) at gstbasetransform.c:1604
#33 0x00002aaaaf8483e9 in gst_pad_chain_unchecked (pad=0xbc7170, 
    buffer=0x8af820) at gstpad.c:3451
#34 0x00002aaaaf848a5a in gst_pad_push (pad=0xbc7000, buffer=0x8af820)
---Type <return> to continue, or q <return> to quit---
    at gstpad.c:3617
#35 0x00002aaaaf5ec02b in gst_base_transform_chain (pad=<value optimized out>, 
    buffer=0x8af8a0) at gstbasetransform.c:1604
#36 0x00002aaaaf8483e9 in gst_pad_chain_unchecked (pad=0x8c8e60, 
    buffer=0x8af8a0) at gstpad.c:3451
#37 0x00002aaaaf848a5a in gst_pad_push (pad=0xbc5570, buffer=0x8af8a0)
    at gstpad.c:3617
#38 0x00002aaaaf8483e9 in gst_pad_chain_unchecked (pad=0xbc6340, 
    buffer=0x8af8a0) at gstpad.c:3451
#39 0x00002aaaaf848a5a in gst_pad_push (pad=0x86b8a0, buffer=0x8af8a0)
    at gstpad.c:3617
#40 0x00002aaab22cf6a9 in vorbis_dec_decode_buffer (vd=0x8c7180, 
    buffer=<value optimized out>) at vorbisdec.c:927
#41 0x00002aaab22d123c in vorbis_dec_chain (pad=<value optimized out>, 
    buffer=0xa7db10) at vorbisdec.c:1343
#42 0x00002aaaaf8483e9 in gst_pad_chain_unchecked (pad=0x86b730, 
    buffer=0xa7db10) at gstpad.c:3451
#43 0x00002aaaaf848a5a in gst_pad_push (pad=0x86b5c0, buffer=0xa7db10)
    at gstpad.c:3617
#44 0x00002aaab03994f8 in gst_queue_loop (pad=<value optimized out>)
    at gstqueue.c:935
#45 0x00002aaaaf86060d in gst_task_func (task=0x916530, 
    tclass=<value optimized out>) at gsttask.c:192
---Type <return> to continue, or q <return> to quit---
#46 0x00000035b704aa99 in g_thread_pool_thread_proxy (
    data=<value optimized out>) at gthreadpool.c:265
#47 0x00000035b70490f4 in g_thread_create_proxy (data=0x8acb20)
    at gthread.c:591
#48 0x00000035b6806305 in start_thread () from /lib64/libpthread.so.0
#49 0x00000035b5ccd50d in clone () from /lib64/libc.so.6
#50 0x0000000000000000 in ?? ()
(gdb) 

On this run however, I also got
parsing output pipeline alsasink
Going into main loop

(jukebox.py:23638): GStreamer-WARNING **: adding flushing pad 'src' to running
element 'sources+audiosource0'

(jukebox.py:23638): GStreamer-WARNING **: adding flushing pad 'src' to running
element 'sources+audiosource1'
prerolled
setting pipeline to PLAYING

(jukebox.py:23638): GStreamer-WARNING **: adding flushing pad 'src' to running
element 'sources+audiosource2'

(jukebox.py:23638): GStreamer-WARNING **: adding flushing pad 'src' to running
element '__main__+jukebox0'
Segmentation fault (core dumped)

attaching a GST_DEBUG=5 log

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