SDP tags should be converted to TagList by the depayloader
The SDP spec rfc4566 supports the following tags:
i=<value>
also called information
is the title of the media, GST_TAG_TITLE
a=lang:<value>
is the language of the stream (RFC 3066, which is explicitly compatible with ISO 639), GST_TAG_LANGUAGE_CODE
Attributes are already in the RTP caps as a-lang=<lang>
, so that can be directly translated to TagList by the depayloader. Not sure about the title.
Also, when we're using RTSP, we can likely also emit GST_TAG_DURATION
when playing on-demand media.