Registers a new tag type for the use with GStreamer's type system. If a type
with that name is already registered, that one is used.
The old registration may have used a different type however. So don't rely
on your supplied values.
Important: if you do not supply a merge function the implication will be
that there can only be one single value for this tag in a tag list and
any additional values will silenty be discarded when being added (unless
GST_TAG_MERGE_REPLACE, GST_TAG_MERGE_REPLACE_ALL, or
GST_TAG_MERGE_PREPEND is used as merge mode, in which case the new
value will replace the old one in the list).
The merge function will be called from gst_tag_list_copy_value() when
it is required that one or more values for a tag be condensed into
one single value. This may happen from gst_tag_list_get_string(),
gst_tag_list_get_int(), gst_tag_list_get_double() etc. What will happen
exactly in that case depends on how the tag was registered and if a
merge function was supplied and if so which one.
Two default merge functions are provided: gst_tag_merge_use_first() and
gst_tag_merge_strings_with_commas().
Registers a new tag type for the use with GStreamer's type system. If a type with that name is already registered, that one is used. The old registration may have used a different type however. So don't rely on your supplied values. Important: if you do not supply a merge function the implication will be that there can only be one single value for this tag in a tag list and any additional values will silenty be discarded when being added (unless GST_TAG_MERGE_REPLACE, GST_TAG_MERGE_REPLACE_ALL, or GST_TAG_MERGE_PREPEND is used as merge mode, in which case the new value will replace the old one in the list). The merge function will be called from gst_tag_list_copy_value() when it is required that one or more values for a tag be condensed into one single value. This may happen from gst_tag_list_get_string(), gst_tag_list_get_int(), gst_tag_list_get_double() etc. What will happen exactly in that case depends on how the tag was registered and if a merge function was supplied and if so which one. Two default merge functions are provided: gst_tag_merge_use_first() and gst_tag_merge_strings_with_commas().