<td>The MPEG-version used for encoding the data. The value 1 refers to MPEG-1, -2 and -2.5 layer 1, 2 or 3. The values 2 and 4 refer to the MPEG-AAC audio encoding schemes.</td>
</tr>
<trclass="odd">
<td></td>
<td></td>
<td>framed</td>
<td>boolean</td>
<td>0 or 1</td>
<td>A true value indicates that each buffer contains exactly one frame. A false value indicates that frames and buffers do not necessarily match up.</td>
</tr>
<trclass="even">
<td></td>
<td></td>
<td>layer</td>
<td>integer</td>
<td>1, 2, or 3</td>
<td>The compression scheme layer used to compress the data <em>(only if mpegversion=1)</em>.</td>