This allows checking the nodes conformity and dumping parsed values. Note: Audio Sample Entry version parsing and offset handling is handled as part of `FOURCC_soun` common processing and in `qtdemux_parse_node`. Also, only read `stream_count` and `coupled_count` when `channel_mapping_family` != 0. See: https://opus-codec.org/docs/opus_in_isobmff.html#4.3.2 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4875>