added 422P and 444P formats (need to patch ffmpeg.c so that it is handled in all the program)

Originally committed as revision 38 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/avcodec.h

@@ -26,6 +26,8 @@ enum PixelFormat {
     PIX_FMT_YUV422,
     PIX_FMT_RGB24,
     PIX_FMT_BGR24,
+    PIX_FMT_YUV422P,
+    PIX_FMT_YUV444P,
 };
 
 /* in bytes */