public static extern int av_picture_pad(AVPicture* dst, AVPicture* src, int height, int width, AVPixelFormat pix_fmt, int padtop, int padbottom, int padleft, int padright, int* color);
 public static extern void av_picture_copy(AVPicture* dst, AVPicture* src, AVPixelFormat pix_fmt, int width, int height);
 public static extern int av_picture_crop(AVPicture* dst, AVPicture* src, AVPixelFormat pix_fmt, int top_band, int left_band);
 public static extern int avpicture_deinterlace(AVPicture* dst, AVPicture* src, AVPixelFormat pix_fmt, int width, int height);
 public static extern int avpicture_layout(AVPicture* src, AVPixelFormat pix_fmt, int width, int height, byte* dest, int dest_size);
 public static extern int avpicture_fill(AVPicture* picture, byte* ptr, AVPixelFormat pix_fmt, int width, int height);
 public static extern void avpicture_free(AVPicture* picture);
 public static extern int avpicture_alloc(AVPicture* picture, AVPixelFormat pix_fmt, int width, int height);