Encoder gif [GIF (Graphics Interchange Format)]:
    General capabilities: none
    Threading capabilities: none
    Supported pixel formats: rgb8 bgr8 rgb4_byte bgr4_byte gray pal8
GIF encoder AVOptions:
  -gifflags          <flags>      E..V..... set GIF flags (default offsetting+transdiff)
     offsetting                   E..V..... enable picture offsetting
     transdiff                    E..V..... enable transparency detection between frames
  -gifimage          <boolean>    E..V..... enable encoding only images per frame (default false)


