The video sink class structure. Derived classes should override the @show_frame virtual function.
the parent class structure
render a video frame. Maps to #GstBaseSinkClass.render() and #GstBaseSinkClass.preroll() vfuncs. Rendering during preroll will be suppressed if the #GstVideoSink:show-preroll-frame property is set to false.
The video sink class structure. Derived classes should override the @show_frame virtual function.