Encoder hevc_qsv [HEVC (Intel Quick Sync Video acceleration)]:
    General capabilities: delay hybrid 
    Threading capabilities: none
    Supported pixel formats: nv12 p010le qsv
hevc_qsv encoder AVOptions:
  -async_depth       <int>        E..V..... Maximum processing parallelism (from 1 to INT_MAX) (default 4)
  -avbr_accuracy     <int>        E..V..... Accuracy of the AVBR ratecontrol (from 0 to INT_MAX) (default 0)
  -avbr_convergence  <int>        E..V..... Convergence of the AVBR ratecontrol (from 0 to INT_MAX) (default 0)
  -preset            <int>        E..V..... (from 1 to 7) (default medium)
     veryfast                     E..V.....
     faster                       E..V.....
     fast                         E..V.....
     medium                       E..V.....
     slow                         E..V.....
     slower                       E..V.....
     veryslow                     E..V.....
  -rdo               <int>        E..V..... Enable rate distortion optimization (from -1 to 1) (default -1)
  -max_frame_size    <int>        E..V..... Maximum encoded frame size in bytes (from -1 to 65535) (default -1)
  -max_slice_size    <int>        E..V..... Maximum encoded slice size in bytes (from -1 to 65535) (default -1)
  -bitrate_limit     <int>        E..V..... Toggle bitrate limitations (from -1 to 1) (default -1)
  -mbbrc             <int>        E..V..... MB level bitrate control (from -1 to 1) (default -1)
  -extbrc            <int>        E..V..... Extended bitrate control (from -1 to 1) (default -1)
  -adaptive_i        <int>        E..V..... Adaptive I-frame placement (from -1 to 1) (default -1)
  -adaptive_b        <int>        E..V..... Adaptive B-frame placement (from -1 to 1) (default -1)
  -b_strategy        <int>        E..V..... Strategy to choose between I/P/B-frames (from -1 to 1) (default -1)
  -idr_interval      <int>        E..V..... Distance (in I-frames) between IDR frames (from -1 to INT_MAX) (default 0)
     begin_only                   E..V..... Output an IDR-frame only at the beginning of the stream
  -load_plugin       <int>        E..V..... A user plugin to load in an internal session (from 0 to 2) (default hevc_sw)
     none                         E..V.....
     hevc_sw                      E..V.....
     hevc_hw                      E..V.....
  -load_plugins      <string>     E..V..... A :-separate list of hexadecimal plugin UIDs to load in an internal session (default "")
  -profile           <int>        E..V..... (from 0 to INT_MAX) (default unknown)
     unknown                      E..V.....
     main                         E..V.....
     main10                       E..V.....
     mainsp                       E..V.....


