Crash when closing pipeline

[Otwoh]

Hello.

I have a C++ GStreamer application which record my webcam.

Here the Pipeline :

ksvideosrc --- queue2 --- ffmpegcolospace --- videorate ---ffenc_mjpeg ---
queue2
                                                                                                            
\
                                                                                                            
avimux --- filesrc
                                                                                                            
/
                              dshowaudiosrc --- audioconvert --- ffenc_aac
--- queue2


When I want to stop recording, I manually call  g_main_loop_quit
(main_loop);
Then, I clear objects:

g_main_loop_run(smp->main_loop);
gst_element_set_state (smp->pipeline, GST_STATE_NULL);
gst_object_unref (smp->pipeline);


It works very well when I use mjpeg encoder, or raw video.
But my application crash every times, when I use an encoder with prediction
(mpeg2, mpeg4, h264)
The crash is a Stack overflow and memory corrupted.

Plus, in spite of crashing, the video file is created and complete. It's
really weird...

How can I stop the capture cleanly ?



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