<dt><i>bitrate_lower</i></dt>
<dd>Specifies the lower limit in a VBR bitstream. If the value matches the bitrate_nominal and bitrate_upper parameters, the stream is fixed bitrate. May be unset if no limit exists.</dd>
<dt><i>bitrate_window</i></dt>
-<dd>Specifies the size of the bit reservoir in /
-lower limit in a VBR bitstream. If the value matches the bitrate_nominal and bitrate_upper parameters, the stream is fixed bitrate. May be unset if no limit exists.</dd>
+<dd>Specifies the size of the bit reservoir in seconds relative to the nominal bitrate. May be unset.</dd>
+<dt><i>codec_setup</i></dt>
+<dd>Pointer to private encoder setup state.</dd>
</dl>