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Describe your issue

Using a shmsrc in combination with a compositor results in a core dump due to an assertion error.

Expected Behavior

The compositor pipeline should start just fine.

Observed Behavior

The compositor pipeline aborts with a core dump due to an assertion error.

Setup

• Operating System: Manjaro Linux 21.2.1 (Qonos)
• Device: Computer
• GStreamer Version: 1.18.5
• Command line: bash

Steps to reproduce the bug

1. open terminal
2. type gst-launch-1.0 -v videotestsrc ! shmsink socket-path=/tmp/bla
3. open another terminal
4. type gst-launch-1.0 -v compositor name=compositor ! autovideosink videotestsrc ! compositor. shmsrc socket-path=/tmp/bla ! 'video/x-raw, format=(string)AYUV64, width=(int)320, height=(int)240, framerate=(fraction)30/1, multiview-mode=(string)mono, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive' ! videoconvert ! compositor.

How reproducible is the bug?

Always

The same assertion error also happens on Ubuntu Linux 20.04 which runs GStreamer version 1.16.2.

Additional Information

Full log output from the two terminal commands:

$ gst-launch-1.0 -v videotestsrc ! shmsink socket-path=/tmp/bla
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
/GstPipeline:pipeline0/GstVideoTestSrc:videotestsrc0.GstPad:src: caps = video/x-raw, format=(string)AYUV64, width=(int)320, height=(int)240, framerate=(fraction)30/1, multiview-mode=(string)mono, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive
/GstPipeline:pipeline0/GstShmSink:shmsink0.GstPad:sink: caps = video/x-raw, format=(string)AYUV64, width=(int)320, height=(int)240, framerate=(fraction)30/1, multiview-mode=(string)mono, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
0:00:00.0 / 99:99:99.

$ gst-launch-1.0 -v compositor name=compositor ! autovideosink videotestsrc ! compositor. shmsrc socket-path=/tmp/bla ! 'video/x-raw, format=(string)AYUV64, width=(int)320, height=(int)240, framerate=(fraction)30/1, multiview-mode=(string)mono, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive' ! videoconvert ! compositor.
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
/GstPipeline:pipeline0/GstVideoTestSrc:videotestsrc0.GstPad:src: caps = video/x-raw, width=(int)320, height=(int)240, framerate=(fraction)30/1, format=(string)Y412_LE, multiview-mode=(string)mono, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive
/GstPipeline:pipeline0/GstCompositor:compositor.GstCompositorPad:sink_0: caps = video/x-raw, width=(int)320, height=(int)240, framerate=(fraction)30/1, format=(string)Y412_LE, multiview-mode=(string)mono, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:src: caps = video/x-raw, format=(string)AYUV64, width=(int)320, height=(int)240, framerate=(fraction)30/1, multiview-mode=(string)mono, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive
/GstPipeline:pipeline0/GstVideoConvert:videoconvert0.GstPad:src: caps = video/x-raw, width=(int)320, height=(int)240, framerate=(fraction)30/1, interlace-mode=(string)progressive, multiview-mode=(string)mono, pixel-aspect-ratio=(fraction)1/1, format=(string)Y412_LE
/GstPipeline:pipeline0/GstCompositor:compositor.GstCompositorPad:sink_1: caps = video/x-raw, width=(int)320, height=(int)240, framerate=(fraction)30/1, interlace-mode=(string)progressive, multiview-mode=(string)mono, pixel-aspect-ratio=(fraction)1/1, format=(string)Y412_LE
**
ERROR:../gst-plugins-base/gst-libs/gst/video/gstvideoaggregator.c:2322:gst_video_aggregator_sink_event: assertion failed: (seg.format == GST_FORMAT_TIME)
/GstPipeline:pipeline0/GstVideoConvert:videoconvert0.GstPad:sink: caps = video/x-raw, format=(string)AYUV64, width=(int)320, height=(int)240, framerate=(fraction)30/1, multiview-mode=(string)mono, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive
Bail out! ERROR:../gst-plugins-base/gst-libs/gst/video/gstvideoaggregator.c:2322:gst_video_aggregator_sink_event: assertion failed: (seg.format == GST_FORMAT_TIME)
Aborted (core dumped)