public static extern String av_chroma_location_name(AVChromaLocation location);
public static extern int avcodec_enum_to_chroma_pos(int* xpos, int* ypos, AVChromaLocation pos);
public static extern System.Int32 avcodec_enum_to_chroma_pos( IntPtr/* System.Int32* */ xpos, IntPtr/* System.Int32* */ ypos, AVChromaLocation pos);
public static extern byte *av_chroma_location_name(AVChromaLocation location);
public static extern int avcodec__to_chroma_pos(int *xpos, int *ypos, AVChromaLocation pos);