debugging shm

gistfile1.txt

wait4(-1, 0:00:00.012423551   495 0x5623afbc1610 DEBUG                 shmsrc gstshmsrc.c:242:gst_shm_src_start_reading:<shmsrc0> Opening socket /tmp/socket                                                                                                                     
0:00:00.012716703   495 0x5623afb94400 LOG                   shmsrc gstshmsrc.c:355:gst_shm_src_create:<shmsrc0> Reading from pipe
0:00:00.019588373   495 0x5623afb94400 LOG                   shmsrc gstshmsrc.c:355:gst_shm_src_create:<shmsrc0> Reading from pipe
0:00:00.019606394   495 0x5623afb94400 LOG                   shmsrc gstshmsrc.c:367:gst_shm_src_create:<shmsrc0> Got buffer 0x7f685e1a8000 of size 951                                                                                                                           
0:00:00.019687150   495 0x5623afb94400 LOG                   shmsrc gstshmsrc.c:310:free_buffer: Freeing buffer 0x7f685e1a8000
ERROR: from element /GstPipeline:pipeline0/GstShmSrc:shmsrc0: Internal data stream error.
Additional debug info:
gstbasesrc.c(3055): gst_base_src_loop (): /GstPipeline:pipeline0/GstShmSrc:shmsrc0:
streaming stopped, reason error (-5)
ERROR: pipeline doesn't want to preroll.
0:00:00.019931273   495 0x5623afbc1610 DEBUG                 shmsrc gstshmsrc.c:271:gst_shm_src_stop_reading:<shmsrc0> Stopping 0x5623afb82200                                                                                                                                   
[{WIFEXITED(s) && WEXITSTATUS(s) == 1}], 0, NULL) = 495
rt_sigaction(SIGINT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f078c198fc0}, {sa_handler=0x556ba01c1350, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f078c198fc0}, 8) = 0                                                                       
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=495, si_uid=0, si_status=1, si_utime=1, si_stime=0} ---
wait4(-1, 0x7ffc089d5c50, WNOHANG, NULL) = -1 ECHILD (No child processes)
rt_sigreturn({mask=[]})                 = 0
read(255, "", 195)                      = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
exit_group(1)                           = ?