SIGSEGV problem when gstreamer pipeline starts to run with glimagesink

[ikshwaku_chauha]

Hello Team, 

This is regarding the current project named Toyota CY20 based on i.MX6Dual.  This is based on L4.14.98-2.0.0_ga. 

Here we have configured the following gstreamer components in our builds:

1. gstreamer1.0-plugins-good
2. gstreamer1.0-plugins-base
3. gstreamer1.0-plugins-bad
4. imx-gst1.0-plugin
5. gstreamer1.0

We are using glimagesink for video playback and we are getting the following error when glimagesink is used for video playback

root@toyotacy20-t077:~# gst-launch-1.0 videotestsrc ! glimagesink
Setting pipeline to PAUSED ...
Caught SIGSEGV
exec gdb failed: No such file or directory
Spinning. Please run 'gdb gst-launch-1.0 489' to continue debugging, Ctrl-C to quit, or Ctrl-\ to dump core.

but i use fakesink instead of glimagesink it is not showing any error:

root@toyotacy20-t077:~# gst-launch-1.0 videotestsrc ! fakesink
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock

Could you please help us in identifying the issue, is we are missing anything in our build env.

Regards,

Ikshwaku

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[Bio_TICFSL]

Hi,

I did not notice you are using sabre auto and ivi-shell. So as I am not familiar with vehicular solutions, I will test it again.

In this meanwhile, could you please change the build from DISTRO=fsl-imx-wayland to DISTRO=fsl-imx-xwayland.

Regards

[Bio_TICFSL]

Hi,

It looks like the backend is wrong. Please, try to edit the vi /etc/xdg/weston.ini, by including the following at the end of the file:

[screen-share]

command=/usr/bin/weston --backend=rdp-backend.so --shell=fullscreen-shell.so --no-clients-resize

The GStreamer support is correct, it is related to framebuffer vs. DRM support.

Please, let me know if it helps.

Regards

[ikshwaku_chauha]

Hello, 

Thanks for inputs. 

But in our builds we don't have rdp-backend.so. I have also build the NXP bsp yocto build with followoing configuration, but not able to locate rdp-backend.so

DISTRO=fsl-imx-wayland MACHINE=imx6dlsabreauto source fsl-setup-release.sh -b build-wayland

bitbake fsl-image-validation-imx

For our build environment, we are using weston with ivi-shell and fbdev-backend.so.

we not facing any problem with any graphics apps like simple-egl and EGLWLMockNavigation.

I have observe two different behaviors for glimagesink:

1.  without exporting "export XDG_RUNTIME_DIR=/var/run/root/1000" following commands works fine and I am able to see color bars on the display and it is using gldisplayvivfb0 :

root@toyotacy20-t077:~# gst-launch-1.0 videotestsrc ! glimagesink
[INFO] Product Info: i.MX6Q/D/S
Can't get caps from capture device, use the default setting.
Perhaps haven't capture device.
display(/dev/fb0) resolution is (1280x720).
Setting pipeline to PAUSED ...
error: XDG_RUNTIME_DIR not set in the environment.
Pipeline is PREROLLING ...
Got context from element 'sink': gst.gl.GLDisplay=context, gst.gl.GLDisplay=(GstGLDisplay)"\(GstGLDisplayVivFB\)\ gldisplayvivfb0";
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
^Chandling interrupt.
Interrupt: Stopping pipeline ...
Execution ended after 0:00:12.241121335
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
Setting pipeline to NULL ...
Total showed frames (369), playing for (0:00:12.242181001), fps (30.142).
Freeing pipeline ...
root@toyotacy20-t077:~#

2. With export XDG_RUNTIME_DIR=/var/run/root/1000 it fails:

root@toyotacy20-t077:~# export XDG_RUNTIME_DIR=/var/run/root/1000

root@toyotacy20-t077:~# gst-launch-1.0 videotestsrc ! glimagesink
[INFO] Product Info: i.MX6Q/D/S
Can't get caps from capture device, use the default setting.
Perhaps haven't capture device.
display(/dev/fb0) resolution is (1280x720).
Setting pipeline to PAUSED ...
Caught SIGSEGV
exec gdb failed: No such file or directory
Spinning. Please run 'gdb gst-launch-1.0 495' to continue debugging, Ctrl-C to quit, or Ctrl-\ to dump core.
^C
root@toyotacy20-t077:~#

Regards,

Ikshwaku

[Bio_TICFSL]

Hello Chauhuan,

It appears to be an issue related to DRM and framebuffer mismatch.

Please, try to use the following pipeline:

gst-launch-1.0 videotestsrc ! imxv4l2sink

 I will reproduce the test in this meanwhile to check what need to be done to enable the glimagesink usage.

Regards

[ikshwaku_chauha]

Hello, 

With imxv4l2sink its giving folloing error:

root@toyotacy20-t077:~# gst-launch-1.0 videotestsrc ! imxv4l2sink
====== IMXV4L2SINK: 4.4.5 build on Feb 17 2020 13:09:18. ======
Setting pipeline to PAUSED ...
ERROR: Pipeline doesn't want to pause.
Setting pipeline to NULL ...
Freeing pipeline ...
root@toyotacy20-t077:~#

Regards,

Ikshwaku

[Bio_TICFSL]

Hi,

I just did a test here using the i.MX 6DL SDB and the L4.14.98-2.0.0ga and both, glimagesink and imxv4l2sink are working on our BSP.

Please, check the log below:

root@imx6qpdlsolox:~# gst-launch-1.0 videotestsrc ! glimagesink                                

Setting pipeline to PAUSED ...                                                                  

Pipeline is PREROLLING ...                                                                      

Got context from element 'sink': gst.gl.GLDisplay=context, gst.gl.GLDisplay=(GstGLDisplay)"\(GstGLDisplayWayland\)\ gldisplaywayland0";                                                        

Pipeline is PREROLLED ...                                                                      

Setting pipeline to PLAYING ...                                                                

New clock: GstSystemClock                                                                      

^Chandling interrupt.                                                                          

Interrupt: Stopping pipeline ...                                                                

Execution ended after 0:00:16.817578668                                                        

Setting pipeline to PAUSED ...                                                                  

Setting pipeline to READY ...                                                                  

Setting pipeline to NULL ...                                                                    

Total showed frames (507), playing for (0:00:16.818711668), fps (30.145).                      

Freeing pipeline ...

root@imx6qpdlsolox:~# gst-launch-1.0 videotestsrc ! imxv4l2sink                                

====== IMXV4L2SINK: 4.4.5 build on Mar 22 2019 12:57:38. ======                                

Setting pipeline to PAUSED ...                                                                  

display(/dev/fb0) resolution is (1024x768).                                                    

Pipeline is PREROLLING ...                                                                      

v4l2sink need allocate 3 buffers.                                                              

Pipeline is PREROLLED ...                                                                      

Setting pipeline to PLAYING ...                                                                

New clock: GstSystemClock                                                                      

^Chandling interrupt.                                                                          

Interrupt: Stopping pipeline ...                                                                

Execution ended after 0:00:10.012261668                                                        

Setting pipeline to PAUSED ...                                                                  

Setting pipeline to READY ...                                                                  

Setting pipeline to NULL ...                                                                    

Total showed frames (301), playing for (0:00:10.012758002), fps (30.062).                      

Freeing pipeline ...                                                                            

root@imx6qpdlsolox:~#

As you can see, the glimagesink uses the gldisplaywayland0, and the imxv4l2sink uses the /dev/fb0, so DRM and Framebuffer are working properly on our BSP.

It looks like the you are missing some video dependence.So please check it.

Regards

[ikshwaku_chauha]

Hello, 

In my previous logs few logs were missing :

root@toyotacy20-t077:~# gst-launch-1.0 videotestsrc ! glimagesink
[INFO] Product Info: i.MX6Q/D/S
Can't get caps from capture device, use the default setting.
Perhaps haven't capture device.
display(/dev/fb0) resolution is (1280x720).
Setting pipeline to PAUSED ...
Caught SIGSEGV
exec gdb failed: No such file or directory
Spinning. Please run 'gdb gst-launch-1.0 487' to continue debugging, Ctrl-C to quit, or Ctrl-\ to dump core.
^C
root@toyotacy20-t077:~#

root@toyotacy20-t077:~# gst-launch-1.0 videotestsrc ! imxv4l2sink
[INFO] Product Info: i.MX6Q/D/S
Can't get caps from capture device, use the default setting.
Perhaps haven't capture device.
display(/dev/fb0) resolution is (1280x720).
====== IMXV4L2SINK: 4.4.5 build on Feb 20 2020 10:09:41. ======
Setting pipeline to PAUSED ...
ERROR: Pipeline doesn't want to pause.
Setting pipeline to NULL ...
Freeing pipeline ...
root@toyotacy20-t077:~#

In your case when you are using glimagesink then the glimagesink uses the gldisplaywayland0 but in our case its is using display(/dev/fb0) .

We are staring weston with following command in service file

/usr/bin/weston --tty=1 --device=/dev/fb0 --backend=fbdev-backend.so --use-g2d=0 --log=/tmp/weston.log

Could please provide your inputs for this?

For gstreamer support we are adding these two packages in our builds:

1. packagegroup-fsl-gstreamer1.0

2. packagegroup-fsl-gstreamer1.0-full

do we need to add any other package specific to gstreamer.

Regards,

Ikshwaku