<div dir="ltr">Hello All, I have a problem with a program displaying video from a webcam. When I build the pipeline and start playing its fine, but I need to clear, re-build and restart the pipeline in some circumstances and when I do it causes a 'Segmentation fault (core dumped)'. Strange thing is it works fine on 2 other computers (one 32 bit and one 64 bit). The only difference I can see is that the one it fails on (64 bit) uses VAAPI. Also if I 'sleep' it before setting the pipeline to PLAY it works. From my debug output (below) as far as I can tell the problem looks to be in the bus sync handler. I've created a cut-down program (attached) to hopefully demonstrate the error (apologies for the length, I've stripped as much as I can). If anyone would care to try it or has any ideas or can point out that I'm doing things incorrectly I'd be grateful for any input. Thanks. This is what happens when I run it... ./testcoredump debug set play 1 libva info: VA-API version 0.35.1 libva info: va_getDriverName() returns 0 libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/r600_drv_video.so libva info: Found init function __vaDriverInit_0_35 libva info: va_openDriver() returns 0 debug sync 1a handle 67108880 debug sync 1b debug sync 1c debug set play 2 debug Restart button clicked debug set play 1 libva info: VA-API version 0.35.1 libva info: va_getDriverName() returns 0 libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/r600_drv_video.so libva info: Found init function __vaDriverInit_0_35 libva info: va_openDriver() returns 0 debug sync 1a handle 67108880 debug sync 1b Segmentation fault (core dumped) </div>