2cdfccc3b5
Handling mouse navigation events in glvideomixer element, if no pixel-aspect-ratio info in the caps, an assertion error is produced inside gst_util_fraction_multiply because default denominator is zero. Error fixed: ``` (gst-launch-1.0:102654): GStreamer-CRITICAL **: 00:47:51.598: gst_util_fraction_multiply: assertion 'b_d != 0' failed ``` Simple pipeline to reproduce the issue: ``` gst-launch-1.0 -v glvideomixer name=mix ! glimagesinkelement gltestsrc ! mix.sink_0 ``` Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3766>