There's no guarantee that upstream elements will do queries with specified
filter caps. If that's the case, just return GST_CAPS_ANY
Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/933>
GList *tmp;
GstCaps *filter_caps = gst_caps_new_empty ();
+ /* If no filter was provided, it can handle anything */
+ if (!caps || gst_caps_is_any (caps))
+ return gst_caps_new_any ();
+
g_mutex_lock (&dbin->factories_lock);
gst_decode_bin_update_factories_list (dbin);
for (tmp = dbin->decoder_factories; tmp; tmp = tmp->next) {