Encoder libvpx-vp9 [libvpx VP9]:
    General capabilities: delay threads 
    Threading capabilities: auto
    Supported pixel formats: yuv420p yuva420p yuv422p yuv440p yuv444p yuv420p10le yuv422p10le yuv440p10le yuv444p10le yuv420p12le yuv422p12le yuv440p12le yuv444p12le gbrp gbrp10le gbrp12le
libvpx-vp9 encoder AVOptions:
  -lag-in-frames     <int>        E..V...... Number of frames to look ahead for alternate reference frame selection (from -1 to INT_MAX) (default -1)
  -arnr-maxframes    <int>        E..V...... altref noise reduction max frame count (from -1 to INT_MAX) (default -1)
  -arnr-strength     <int>        E..V...... altref noise reduction filter strength (from -1 to INT_MAX) (default -1)
  -arnr-type         <int>        E..V...... altref noise reduction filter type (from -1 to INT_MAX) (default -1)
     backward        1            E..V......
     forward         2            E..V......
     centered        3            E..V......
  -tune              <int>        E..V...... Tune the encoding to a specific scenario (from -1 to INT_MAX) (default -1)
     psnr            0            E..V......
     ssim            1            E..V......
  -deadline          <int>        E..V...... Time to spend encoding, in microseconds. (from INT_MIN to INT_MAX) (default good)
     best            0            E..V......
     good            1000000      E..V......
     realtime        1            E..V......
  -error-resilient   <flags>      E..V...... Error resilience configuration (default 0)
     default                      E..V...... Improve resiliency against losses of whole frames
     partitions                   E..V...... The frame partitions are independently decodable by the bool decoder, meaning that partitions can be decoded even though earlier partitions have been lost. Note that intra prediction is still done over the partition boundary.
  -max-intra-rate    <int>        E..V...... Maximum I-frame bitrate (pct) 0=unlimited (from -1 to INT_MAX) (default -1)
  -crf               <int>        E..V...... Select the quality for constant quality mode (from -1 to 63) (default -1)
  -static-thresh     <int>        E..V...... A change threshold on blocks below which they will be skipped by the encoder (from 0 to INT_MAX) (default 0)
  -drop-threshold    <int>        E..V...... Frame drop threshold (from INT_MIN to INT_MAX) (default 0)
  -noise-sensitivity <int>        E..V...... Noise sensitivity (from 0 to 4) (default 0)
  -undershoot-pct    <int>        E..V...... Datarate undershoot (min) target (%) (from -1 to 100) (default -1)
  -overshoot-pct     <int>        E..V...... Datarate overshoot (max) target (%) (from -1 to 1000) (default -1)
  -ts-parameters     <dictionary> E..V...... Temporal scaling configuration using a :-separated list of key=value parameters
  -auto-alt-ref      <int>        E..V...... Enable use of alternate reference frames (2-pass only) (from -1 to 6) (default -1)
  -cpu-used          <int>        E..V...... Quality/Speed ratio modifier (from -8 to 8) (default 1)
  -lossless          <int>        E..V...... Lossless mode (from -1 to 1) (default -1)
  -tile-columns      <int>        E..V...... Number of tile columns to use, log2 (from -1 to 6) (default -1)
  -tile-rows         <int>        E..V...... Number of tile rows to use, log2 (from -1 to 2) (default -1)
  -frame-parallel    <boolean>    E..V...... Enable frame parallel decodability features (default auto)
  -aq-mode           <int>        E..V...... adaptive quantization mode (from -1 to 4) (default -1)
     none            0            E..V...... Aq not used
     variance        1            E..V...... Variance based Aq
     complexity      2            E..V...... Complexity based Aq
     cyclic          3            E..V...... Cyclic Refresh Aq
     equator360      4            E..V...... 360 video Aq
  -level             <float>      E..V...... Specify level (from -1 to 6.2) (default -1)
  -row-mt            <boolean>    E..V...... Row based multi-threading (default auto)
  -tune-content      <int>        E..V...... Tune content type (from -1 to 2) (default -1)
     default         0            E..V...... Regular video content
     screen          1            E..V...... Screen capture content
     film            2            E..V...... Film content; improves grain retention
  -corpus-complexity <int>        E..V...... corpus vbr complexity midpoint (from -1 to 10000) (default -1)
  -enable-tpl        <boolean>    E..V...... Enable temporal dependency model (default auto)
  -speed             <int>        E..V......  (from -16 to 16) (default 1)
  -quality           <int>        E..V......  (from INT_MIN to INT_MAX) (default good)
     best            0            E..V......
     good            1000000      E..V......
     realtime        1            E..V......
  -vp8flags          <flags>      E..V......  (default 0)
     error_resilient              E..V...... enable error resilience
     altref                       E..V...... enable use of alternate reference frames (VP8/2-pass only)
  -arnr_max_frames   <int>        E..V...... altref noise reduction max frame count (from 0 to 15) (default 0)
  -arnr_strength     <int>        E..V...... altref noise reduction filter strength (from 0 to 6) (default 3)
  -arnr_type         <int>        E..V...... altref noise reduction filter type (from 1 to 3) (default 3)
  -rc_lookahead      <int>        E..V...... Number of frames to look ahead for alternate reference frame selection (from 0 to 25) (default 25)
  -sharpness         <int>        E..V...... Increase sharpness at the expense of lower PSNR (from -1 to 7) (default -1)