these restrictions.</p>

<p>The first page of a logical Ogg bitstream consists of a single,
small 'initial header' packet that includes sufficient information to
identify the exact CODEC type and media requirements of the logical
bitstream. The intent of this restriction is to simplify identifying
the bitstream type and content; for a given media type (or across all
Ogg media types) we can know that we only need a small, fixed
amount of data to uniquely identify the bitstream type.</p>

<p>As an example, Og