squo;<samp>window_size</samp>&rsquo;</dt>
<dd><p>Set the created window size, can be a string of the form
<var>width</var>x<var>height</var> or a video size abbreviation. If not
specified it defaults to the size of the input video.
Ignored when <var>window_id</var> is set.
</p>
</dd>
<dt>&lsquo;<samp>window_x</samp>&rsquo;</dt>
<dt>&lsquo;<samp>window_y</samp>&rsquo;</dt>
<dd><p>Set the X and Y window offsets for the created window. They are both
set to 0 by default. The values may be ignored by the window 