g_main_loop hangs

Anton Pryima zingfrid at gmail.com
Thu Jun 25 19:47:17 UTC 2020

Hello all.

I have some application, which receives the stream from rtsp and dumps it
to the files.
Method is like this:
*Left pipe *part*:*
rtspsrc -> rtph264depay -> appsink(samples)-> [handmadebuffer]
*Right pipe *part:
[handmadebuffer] -> appsrc(samples)->h264parse->splitmuxsink.
It working fine. When I want to stop just *Right* part I'm calling
*gst_element_send_event (pipeline, gst_event_new_eos());*
And it works fine. The *Right* part pipe correctly finishes.
I have Bus_on_message callbacks which process EOS and ERROR messages and it
works fine for both pipes.
When I just plug-off my rtsp source (pull-out network cable) I have the
correct EOS message for *Left* pipe and from my on_eos_message callback for
*Left* pipe, I call gst_element_send_event (pipeline, gst_event_new_eos())
for my *Right* pipe. And the magic begins to happen... g_main_loop for
*Right* pipe just hangs. No EOS messages for *Right* pipe. Nothing. Using
gdb I've attached to my app and made a bt for that thread:

*gdb) bt#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38#1
 0x00007ff9e3c15483 in g_cond_wait () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0#2  0x00007ff9e3bc5105 in  () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0#3  0x00007ff9e3bc8598 in
g_main_loop_run () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0*

Here is bt head above my functions.

Does anybody know how to proceed with this? Googe did not help much with
this :(

Thank you in advance,
Best regards,
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