ref: 089ed30d072e6f9ebd2403d84569c64a90ce190c
dir: /usage_cx.dox/
/*! \page usage_encode Encode
    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.
    \ref samples
*/