AV_PIX_FMT_GRAYF32

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
extern (C) @nogc nothrow
enum AV_PIX_FMT_GRAYF32 = AVPixelFormat.AV_PIX_FMT_GRAYF32LE;

Meta