Thread 1 (Thread -1211455824 (LWP 19085)):
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb7cd3651 in *__GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#2  0xb7cd4ca9 in *__GI_abort () at abort.c:88
#3  0xb7d0839b in __libc_message (do_abort=2, fmt=0xb7db8338 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:170
#4  0xb7d0dda0 in malloc_printerr (action=2, str=0xb7db8430 "double free or corruption (!prev)", ptr=<value optimized out>) at malloc.c:5616
#5  0xb7d0f3e4 in *__GI___libc_free (mem=0x8277e98) at malloc.c:3447
#6  0xb73b1b12 in EClearFragmentInfo (cpi=0x8444488) at encoder_toplevel.c:48
#7  0xb73b1c57 in theora_encoder_clear (cpi=0x8444488) at encoder_toplevel.c:1212
#8  0xb73a6744 in theora_clear (t=0x822afa0) at toplevel.c:91
#9  0xb7526a6e in theora_enc_change_state (element=0x822adb0, transition=GST_STATE_CHANGE_PAUSED_TO_READY) at theoraenc.c:863
#10 0xb76ff78a in gst_element_change_state (element=0x822adb0, transition=GST_STATE_CHANGE_PAUSED_TO_READY) at gstelement.c:2231
#11 0xb7702787 in gst_element_set_state_func (element=0x822adb0, state=GST_STATE_READY) at gstelement.c:2193
#12 0xb76fe943 in gst_element_set_state (element=0x822adb0, state=GST_STATE_READY) at gstelement.c:2103
#13 0xb76f3bb2 in gst_bin_change_state_func (element=0x8365800, transition=GST_STATE_CHANGE_PAUSED_TO_READY) at gstbin.c:1759
#14 0xb76ff78a in gst_element_change_state (element=0x8365800, transition=GST_STATE_CHANGE_PAUSED_TO_READY) at gstelement.c:2231
#15 0xb7702787 in gst_element_set_state_func (element=0x8365800, state=GST_STATE_READY) at gstelement.c:2193
#16 0xb76fe943 in gst_element_set_state (element=0x8365800, state=GST_STATE_READY) at gstelement.c:2103
#17 0xb76f3bb2 in gst_bin_change_state_func (element=0x8236a68, transition=GST_STATE_CHANGE_PAUSED_TO_READY) at gstbin.c:1759
---Type <return> to continue, or q <return> to quit---
#18 0xb771e18a in gst_pipeline_change_state (element=0x8236a68, transition=GST_STATE_CHANGE_PAUSED_TO_READY) at gstpipeline.c:490
#19 0xb76ff78a in gst_element_change_state (element=0x8236a68, transition=GST_STATE_CHANGE_PAUSED_TO_READY) at gstelement.c:2231
#20 0xb76ff873 in gst_element_change_state (element=0x8236a68, transition=<value optimized out>) at gstelement.c:2264
#21 0xb7702787 in gst_element_set_state_func (element=0x8236a68, state=GST_STATE_NULL) at gstelement.c:2193
#22 0xb76fe943 in gst_element_set_state (element=0x8236a68, state=GST_STATE_NULL) at gstelement.c:2103