private void Initialize(int width, int height, AVPixelFormat inFormat)
 {
   _initialized = true;
   _pContext = FFmpegInvoke.sws_getContext(width, height, inFormat, width, height, _pixelFormat, FFmpegInvoke.SWS_FAST_BILINEAR, null, null, null);
   if (_pContext == null)
     throw new VideoConverterException("Could not initialize the conversion context.");
   _pCurrentFrame = FFmpegInvoke.avcodec_alloc_frame();
   int outputDataSize = FFmpegInvoke.avpicture_get_size(_pixelFormat, width, height);
   _outputData = new byte[outputDataSize];
   fixed (byte* pOutputData = &_outputData[0])
   {
     FFmpegInvoke.avpicture_fill((AVPicture*)_pCurrentFrame, pOutputData, _pixelFormat, width, height);
   }
 }

 public static extern void av_picture_copy(AVPicture* dst, AVPicture* src, AVPixelFormat pix_fmt, int width, int height);

 public static extern int sws_isSupportedEndiannessConversion(AVPixelFormat pix_fmt);

 public static extern int av_image_copy_to_buffer(byte* dst, int dst_size, byte** src_data, int* src_linesize, AVPixelFormat pix_fmt, int width, int height, int align);

 public static extern int av_image_fill_arrays(byte** dst_data, int* dst_linesize, byte* src, AVPixelFormat pix_fmt, int width, int height, int align);

 public static extern int av_image_alloc(byte** pointers, int* linesizes, int w, int h, AVPixelFormat pix_fmt, int align);

 public static extern int av_image_fill_linesizes(int* linesizes, AVPixelFormat pix_fmt, int width);

 public static extern AVPixelFormat av_find_best_pix_fmt_of_2(AVPixelFormat dst_pix_fmt1, AVPixelFormat dst_pix_fmt2, AVPixelFormat src_pix_fmt, int has_alpha, int* loss_ptr);

 public static extern int av_opt_set_pixel_fmt(void* obj, String name, AVPixelFormat fmt, int search_flags);

 public static extern AVPixelFormat avcodec_default_get_format(AVCodecContext* s, AVPixelFormat* fmt);

 public static extern AVPixelFormat avcodec_find_best_pix_fmt_of_list(AVPixelFormat* pix_fmt_list, AVPixelFormat src_pix_fmt, int has_alpha, int* loss_ptr);

 public static extern int avcodec_pix_fmt_to_codec_tag(AVPixelFormat pix_fmt);

 public static extern void avcodec_get_chroma_sub_sample(AVPixelFormat pix_fmt, int* h_shift, int* v_shift);

 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 int av_picture_crop(AVPicture* dst, AVPicture* src, AVPixelFormat pix_fmt, int top_band, int left_band);

 public static extern AVPixelFormat av_pix_fmt_swap_endianness(AVPixelFormat pix_fmt);

 public static extern int av_get_pix_fmt_loss(AVPixelFormat dst_pix_fmt, AVPixelFormat src_pix_fmt, int has_alpha);

 public static extern int av_opt_get_pixel_fmt(void* obj, String name, int search_flags, AVPixelFormat* out_fmt);

 public static extern int av_image_get_linesize(AVPixelFormat pix_fmt, int width, int plane);

 public static extern AVFilterBufferRef* avfilter_get_video_buffer_ref_from_arrays(byte** data, int* linesize, int perms, int w, int h, AVPixelFormat format);