$ corebird --gst-debug=5
/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_GB.UTF-8)
0:00:00.000128857 32371 0xe97c30 DEBUG GST_MEMORY gstallocator.c:585:_priv_gst_allocator_initialize: memory alignment: 7
0:00:00.000240744 32371 0xe97c30 DEBUG GST_MEMORY gstallocator.c:562:gst_allocator_sysmem_init: init allocator 0xe9c840
0:00:00.000270613 32371 0xe97c30 DEBUG GST_MEMORY gstallocator.c:210:gst_allocator_register: registering allocator 0xe9c840 with name "SystemMemory"
0:00:00.000334049 32371 0xe97c30 INFO GST_INIT gstmessage.c:119:_priv_gst_message_initialize: init messages
0:00:00.000398188 32371 0xe97c30 DEBUG GST_ELEMENT_PADS gstelement.c:281:gst_element_base_class_init: type GstElement : factory (nil)
0:00:00.000435617 32371 0xe97c30 DEBUG GST_ELEMENT_PADS gstelement.c:281:gst_element_base_class_init: type GstBin : factory (nil)
0:00:00.000472040 32371 0xe97c30 DEBUG bin gstbin.c:474:gst_bin_class_init: creating bin thread pool
0:00:00.000701655 32371 0xe97c30 INFO GST_INIT gstcontext.c:83:_priv_gst_context_initialize: init contexts
0:00:00.000835642 32371 0xe97c30 INFO GST_PLUGIN_LOADING gstplugin.c:316:_priv_gst_plugin_initialize: registering 0 static plugins
0:00:00.000881009 32371 0xe97c30 DEBUG GST_REGISTRY gstregistry.c:587:gst_registry_add_feature:<registry0> adding feature 0xeb5040 (bin)
0:00:00.000891202 32371 0xe97c30 DEBUG GST_REFCOUNTING gstobject.c:692:gst_object_set_parent:<bin> set parent (ref and sink)
0:00:00.000909484 32371 0xe97c30 DEBUG GST_ELEMENT_PADS gstelement.c:281:gst_element_base_class_init: type GstPipeline : factory 0xeb5120
0:00:00.000929590 32371 0xe97c30 DEBUG GST_REGISTRY gstregistry.c:587:gst_registry_add_feature:<registry0> adding feature 0xeb5120 (pipeline)
0:00:00.000936715 32371 0xe97c30 DEBUG GST_REFCOUNTING gstobject.c:692:gst_object_set_parent:<pipeline> set parent (ref and sink)
0:00:00.000943396 32371 0xe97c30 INFO GST_PLUGIN_LOADING gstplugin.c:224:gst_plugin_register_static: registered static plugin "staticelements"
0:00:00.000950201 32371 0xe97c30 DEBUG GST_REGISTRY gstregistry.c:476:gst_registry_add_plugin:<registry0> adding plugin 0xeb4040 for filename "(NULL)"
0:00:00.000957106 32371 0xe97c30 INFO GST_PLUGIN_LOADING gstplugin.c:226:gst_plugin_register_static: added static plugin "staticelements", result: 1
0:00:00.000969301 32371 0xe97c30 INFO GST_REGISTRY gstregistry.c:1723:ensure_current_registry: reading registry cache: /home/dllewellyn/snap/corebird/x10/.cache/gstreamer-1.0/registry.x86_64.bin
0:00:00.001018921 32371 0xe97c30 INFO GST_REGISTRY gstregistrybinary.c:537:priv_gst_registry_binary_read_cache: Unable to mmap file /home/dllewellyn/snap/corebird/x10/.cache/gstreamer-1.0/registry.x86_64.bin : Failed to open file '/home/dllewellyn/snap/corebird/x10/.cache/gstreamer-1.0/registry.x86_64.bin': open() failed: No such file or directory
0:00:00.001036346 32371 0xe97c30 INFO GST_REGISTRY gstregistrybinary.c:547:priv_gst_registry_binary_read_cache: Unable to read file /home/dllewellyn/snap/corebird/x10/.cache/gstreamer-1.0/registry.x86_64.bin : Failed to open file '/home/dllewellyn/snap/corebird/x10/.cache/gstreamer-1.0/registry.x86_64.bin': No such file or directory
0:00:00.001045825 32371 0xe97c30 DEBUG GST_REGISTRY gstregistry.c:1751:ensure_current_registry: Updating registry cache
0:00:00.001050870 32371 0xe97c30 INFO GST_REGISTRY gstregistry.c:1579:scan_and_update_registry: Validating plugins from registry cache: /home/dllewellyn/snap/corebird/x10/.cache/gstreamer-1.0/registry.x86_64.bin
0:00:00.001056908 32371 0xe97c30 DEBUG GST_REGISTRY gstregistry.c:1589:scan_and_update_registry: scanning paths added via --gst-plugin-path
0:00:00.001062126 32371 0xe97c30 DEBUG GST_REGISTRY gstregistry.c:1612:scan_and_update_registry: GST_PLUGIN_PATH not set
0:00:00.001066780 32371 0xe97c30 DEBUG GST_REGISTRY gstregistry.c:1624:scan_and_update_registry: GST_PLUGIN_SYSTEM_PATH not set
0:00:00.001074043 32371 0xe97c30 DEBUG GST_REGISTRY gstregistry.c:1631:scan_and_update_registry: scanning home plugins /home/dllewellyn/snap/corebird/x10/.local/share/gstreamer-1.0/plugins
0:00:00.001080262 32371 0xe97c30 DEBUG GST_REGISTRY gstregistry.c:1364:gst_registry_scan_path_internal:<registry0> scanning path /home/dllewellyn/snap/corebird/x10/.local/share/gstreamer-1.0/plugins
0:00:00.001093506 32371 0xe97c30 DEBUG GST_REGISTRY gstregistry.c:1368:gst_registry_scan_path_internal:<registry0> registry changed in path /home/dllewellyn/snap/corebird/x10/.local/share/gstreamer-1.0/plugins: 0
0:00:00.001102038 32371 0xe97c30 DEBUG GST_REGISTRY gstregistry.c:1659:scan_and_update_registry: scanning main plugins /usr/lib/x86_64-linux-gnu/gstreamer-1.0
0:00:00.001108265 32371 0xe97c30 DEBUG GST_REGISTRY gstregistry.c:1364:gst_registry_scan_path_internal:<registry0> scanning path /usr/lib/x86_64-linux-gnu/gstreamer-1.0
0:00:00.001117158 32371 0xe97c30 DEBUG GST_REGISTRY gstregistry.c:1368:gst_registry_scan_path_internal:<registry0> registry changed in path /usr/lib/x86_64-linux-gnu/gstreamer-1.0: 0
0:00:00.001123953 32371 0xe97c30 DEBUG GST_REGISTRY gstregistry.c:1527:gst_registry_remove_cache_plugins:<registry0> removing cached plugins
0:00:00.001129107 32371 0xe97c30 INFO GST_REGISTRY gstregistry.c:1681:scan_and_update_registry: Registry cache has not changed
0:00:00.001133846 32371 0xe97c30 INFO GST_REGISTRY gstregistry.c:1758:ensure_current_registry: registry reading and updating done, result = 1
0:00:00.001139631 32371 0xe97c30 INFO GST_INIT gst.c:724:init_post: GLib runtime version: 2.48.1
0:00:00.001146169 32371 0xe97c30 INFO GST_INIT gst.c:726:init_post: GLib headers version: 2.48.1
0:00:00.001152132 32371 0xe97c30 INFO GST_INIT gst.c:727:init_post: initialized GStreamer successfully
0:00:00.001157366 32371 0xe97c30 DEBUG default gsttracerutils.c:78:_priv_gst_tracing_init: Initializing GstTracer
(corebird:32371): Gtk-WARNING **: Locale not supported by C library.
Using the fallback 'C' locale.
Gtk-Message: Failed to load module "canberra-gtk-module"
Gtk-Message: Failed to load module "canberra-gtk-module"
(corebird:32371): Gtk-WARNING **: Theme parsing error: style.css:158:12: 'min-height' is not a valid property name
(corebird:32371): Gtk-WARNING **: Theme parsing error: style.css:232:12: 'min-height' is not a valid property name
(corebird:32371): Gtk-WARNING **: Theme parsing error: style.css:233:11: 'min-width' is not a valid property name
0:00:00.049623456 32371 0xe97c30 DEBUG GST_INIT gst.c:477:init_pre: already initialized
0:00:00.049647231 32371 0xe97c30 DEBUG GST_INIT gst.c:568:init_post: already initialized
0:00:13.274433871 32371 0xe97c30 INFO GST_ELEMENT_FACTORY gstelementfactory.c:457:gst_element_factory_make: no such element factory "playbin"!
0:00:13.274458097 32371 0xe97c30 INFO GST_ELEMENT_FACTORY gstelementfactory.c:457:gst_element_factory_make: no such element factory "gtksink"!
** (corebird:32371): CRITICAL **: MediaVideoWidget.vala:92: Could not create a gtksink. Need gst-plugins-bad >= 1.6