/*! \page usage_encode Encoding     The vpx_codec_encode() function is at the core of the encode loop. It    processes raw images passed by the application, producing packets of    compressed data. The <code>deadline</code> parameter controls the amount    of time in microseconds the encoder should spend working on the frame. For    more information on the <code>deadline</code> parameter, see    \ref usage_deadline.      \if samples    \ref samples    \endif */