d>
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<p style="margin-top: 1em" valign="top">Specify the
compression method to use. This parameter controls the trade
off between encoding speed and the compressed file size and
quality. Possible values range from 0 to 6. Default value is
4. When higher values are used, the encoder will spend more
time inspecting additional encoding possibilities and decide
on the quality gain. Lower value can result is faster
processing time at the expense of larger file size and lower