Encoder mpeg4 [MPEG-4 part 2]:
    Threading capabilities: slice
    Supported pixel formats: yuv420p
MPEG4 encoder AVOptions:
  -data_partitioning <int>        E..V.. Use data partitioning. (from 0 to 1)
  -alternate_scan    <int>        E..V.. Enable alternate scantable. (from 0 to 1)
  -mpv_flags         <flags>      E..V.. Flags common for all mpegvideo-based encoders.
     skip_rd                      E..V.. RD optimal MB level residual skipping
     strict_gop                   E..V.. Strictly enforce gop size
     qp_rd                        E..V.. Use rate distortion optimization for qp selection
     cbp_rd                       E..V.. use rate distortion optimization for CBP
  -luma_elim_threshold <int>        E..V.. single coefficient elimination threshold for luminance (negative values also consider dc coefficient) (from INT_MIN to INT_MAX)
  -chroma_elim_threshold <int>        E..V.. single coefficient elimination threshold for chrominance (negative values also consider dc coefficient) (from INT_MIN to INT_MAX)
  -quantizer_noise_shaping <int>        E..V.. (from 0 to INT_MAX)

