Allow to parse PPS to be parser even if SPS hasn't been parsered before. This help to parse VPSSPSPPS_A_MainConcept_1 conformance test Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2575>
Allow to parse PPS to be parser even if SPS hasn't been parsered before. This help to parse VPSSPSPPS_A_MainConcept_1 conformance test Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2575>