proc av_chroma_location_from_name(name: cstring): cint {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_chroma_location_name(lovation: AVChromaLocation): cstring {.importc,
    cdecl, ...raises: [], tags: [], forbids: [].}

proc av_color_primaries_from_name(name: cstring): cint {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_color_primaries_name(primaries: AVColorPrimaries): cstring {.importc,
    cdecl, ...raises: [], tags: [], forbids: [].}

proc av_color_range_from_name(name: cstring): cint {.importc, cdecl, ...raises: [],
    tags: [], forbids: [].}

proc av_color_range_name(range: AVColorRange): cstring {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_color_space_from_name(name: cstring): cint {.importc, cdecl, ...raises: [],
    tags: [], forbids: [].}

proc av_color_space_name(space: AVColorSpace): cstring {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_color_transfer_from_name(name: cstring): cint {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_color_transfer_name(transfer: AVColorTransferCharacteristic): cstring {.
    importc, cdecl, ...raises: [], tags: [], forbids: [].}

proc av_find_best_pix_fmt_of_2(dst_pix_fmt1, dst_pix_fmt2, srcc_pix_fmt: AVPixelFormat;
                               has_alpha: cint; loss_ptr: ptr cint): AVPixelFormat {.
    importc, cdecl, ...raises: [], tags: [], forbids: [].}

proc av_get_bits_per_pixel(pixdesc: ptr AVPixFmtDescriptor): cint {.importc,
    cdecl, ...raises: [], tags: [], forbids: [].}

proc av_get_padded_bits_per_pixel(pixdesc: ptr AVPixFmtDescriptor): cint {.
    importc, cdecl, ...raises: [], tags: [], forbids: [].}

proc av_get_pix_fmt(name: cstring): AVPixelFormat {.importc, cdecl, ...raises: [],
    tags: [], forbids: [].}

proc av_get_pix_fmt_loss(dst_pix_fmt, src_pix_fmt: AVPixelFormat;
                         has_alpha: cint): cint {.importc, cdecl, ...raises: [],
    tags: [], forbids: [].}

proc av_get_pix_fmt_name(pix_fmt: AVPixelFormat): cstring {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_get_pix_fmt_string(buf: cstring; buf_size: cint; pix_fmt: AVPixelFormat): cstring {.
    importc, cdecl, ...raises: [], tags: [], forbids: [].}

proc av_pix_fmt_count_planes(pix_fmt: AVPixelFormat): cint {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_pix_fmt_desc_get(pix_fmt: AVPixelFormat): ptr AVPixFmtDescriptor {.
    importc, cdecl, ...raises: [], tags: [], forbids: [].}

proc av_pix_fmt_desc_get_id(desc: ptr AVPixFmtDescriptor): AVPixelFormat {.
    importc, cdecl, ...raises: [], tags: [], forbids: [].}

proc av_pix_fmt_desc_next(prev: ptr AVPixFmtDescriptor): ptr AVPixFmtDescriptor {.
    importc, cdecl, ...raises: [], tags: [], forbids: [].}

proc av_pix_fmt_get_chroma_sub_sample(pix_fmt: AVPixelFormat;
                                      h_shift, v_shift: ptr cint): cint {.
    importc, cdecl, ...raises: [], tags: [], forbids: [].}

proc av_pix_fmt_swap_endianness(pix_fmt: AVPixelFormat): AVPixelFormat {.
    importc, cdecl, ...raises: [], tags: [], forbids: [].}

proc av_read_image_line(dst: ptr uint16; data: ptr ptr uint8;
                        linesize: ptr cint; desc: ptr AVPixFmtDescriptor;
                        x, y, c, w, read_pal_componnent: cint) {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_read_image_line2(dst: pointer; data: ptr ptr uint8; linesize: ptr cint;
                         desc: ptr AVPixFmtDescriptor;
                         x, y, c, w, read_pal_component, dst_element_size: cint) {.
    importc, cdecl, ...raises: [], tags: [], forbids: [].}

proc av_write_image_line(src: ptr uint16; data: ptr ptr uint8;
                         linesize: ptr cint; desc: ptr AVPixFmtDescriptor;
                         x, y, c, w: cint) {.importc, cdecl, ...raises: [],
    tags: [], forbids: [].}

proc av_write_image_line2(src: pointer; data: ptr ptr uint8; linesize: ptr cint;
                          desc: ptr AVPixFmtDescriptor; x, y, c, w: cint) {.
    importc, cdecl, ...raises: [], tags: [], forbids: [].}