Bug 687668 – Gst-launch pipeline with vp8 crashing

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Bug 687668 - Gst-launch pipeline with vp8 crashing


Summary:	Gst-launch pipeline with vp8 crashing


Status:	RESOLVED DUPLICATE of bug 687793

Product:	GStreamer
Classification:	Platform
Component:	gst-plugins-good
Version:	1.x
Hardware:	Other Linux

Importance:	Normal normal
Target Milestone:	NONE
Assigned To:	GStreamer Maintainers
QA Contact:	GStreamer Maintainers

URL:
Whiteboard:

Depends on:
Blocks:

Reported:	2012-11-05 16:32 UTC by Christian Fredrik Kalager Schaller
Modified:	2012-11-07 12:25 UTC

See Also:
GNOME target:	---
GNOME version:	---

Attachments
GSt-debug log (218.01 KB, application/x-bzip2) 2012-11-07 12:23 UTC, Christian Fredrik Kalager Schaller	Details

Description Christian Fredrik Kalager Schaller 2012-11-05 16:32:42 UTC

gst-launch-1.0 v4l2src ! vp8enc ! vp8dec ! xvimagesink
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
0:00:00.070079535 23018       0x9d0990 ERROR                 vp8enc gstvp8enc.c:1841:gst_vp8_enc_finish:<vp8enc0> encode returned 1 error
Caught SIGSEGV accessing address 0x88
ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Internal data flow error.
Additional debug info:
gstbasesrc.c(2781): gst_base_src_loop (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
streaming task paused, reason not-negotiated (-4)
Execution ended after 784558 ns.
Setting pipeline to PAUSED ...

+ Trace 231136

#0 __lll_lock_wait
#1 _L_lock_1024
from /lib64/libpthread.so.0
#2 __pthread_mutex_lock
#3 g_mutex_lock
#4 gst_base_src_set_playing
#5 gst_base_src_change_state
#6 gst_v4l2src_change_state
#7 gst_element_change_state
#8 gst_element_set_state_func
#9 gst_bin_element_set_state
#10 gst_bin_change_state_func
#11 gst_pipeline_change_state
#12 gst_element_change_state
#13 gst_element_set_state_func
#14 main

Comment 1 Tim-Philipp Müller 2012-11-06 23:21:28 UTC

Can you reproduce this crash?

The stack trace is not very useful unfortunately. Please do what it tells you to do and attach with gdb next time you run into this crash.

Please also provide a *:6 debug log, thanks.

Comment 2 Christian Fredrik Kalager Schaller 2012-11-07 10:31:17 UTC

+ Trace 231143

Thread 2 (Thread 0x7eff5f224700 (LWP 14111))

#0 nanosleep
at ../sysdeps/unix/syscall-template.S line 82
#1 g_usleep
at gtimer.c line 259
#2 fault_spin
at gst-launch.c line 149
#3 fault_handler_sigaction
at gst-launch.c line 129
#4 <signal handler called>
#5 gst_v4l2_buffer_pool_process
at gstv4l2bufferpool.c line 1035
#6 gst_v4l2src_fill
at gstv4l2src.c line 771
#7 gst_base_src_default_create
at gstbasesrc.c line 1422
#8 gst_base_src_get_range
at gstbasesrc.c line 2345
#9 gst_base_src_loop
at gstbasesrc.c line 2590
#10 gst_task_func
at gsttask.c line 316
#11 g_thread_pool_thread_proxy
at gthreadpool.c line 309
#12 g_thread_proxy
at gthread.c line 801
#13 start_thread
at pthread_create.c line 309
#14 clone
at ../sysdeps/unix/sysv/linux/x86_64/clone.S line 115
#1 _L_lock_1024
from /lib64/libpthread.so.0
#2 __pthread_mutex_lock
at pthread_mutex_lock.c line 105
#3 g_mutex_lock
at gthread-posix.c line 208
#4 gst_base_src_set_playing
at gstbasesrc.c line 3433
#5 gst_base_src_change_state
at gstbasesrc.c line 3606
#6 gst_v4l2src_change_state
at gstv4l2src.c line 741
#7 gst_element_change_state
at gstelement.c line 2576
#8 gst_element_set_state_func
at gstelement.c line 2532
#9 gst_bin_element_set_state
at gstbin.c line 2306
#10 gst_bin_change_state_func
at gstbin.c line 2608
#11 gst_pipeline_change_state
at gstpipeline.c line 468
#12 gst_element_change_state
at gstelement.c line 2576
#13 gst_element_set_state_func
at gstelement.c line 2532
#14 main
at gst-launch.c line 1156

Comment 3 Tim-Philipp Müller 2012-11-07 10:46:23 UTC

Looks like what Debarshi ran into as well.

*** This bug has been marked as a duplicate of bug 687793 ***

Comment 4 Christian Fredrik Kalager Schaller 2012-11-07 12:23:24 UTC

Created attachment 228358 [details]
GSt-debug log

Added the GST_DEBUG log, but it seems the crash does not trigger when I run it with gst-debug, so maybe some kind or race condition?

Comment 5 Christian Fredrik Kalager Schaller 2012-11-07 12:25:28 UTC

Also adding a videoconvert element to the pipeline makes it work:
gst-launch-1.0 v4l2src ! videoconvert ! vp8enc ! vp8dec ! xvimagesink