add yuvs fourcc to raw.c and isom.c, fixes samples/mov/yuvs.mov

patch by Andrew Wason

Originally committed as revision 20439 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/raw.c

@@ -62,6 +62,7 @@ const PixelFormatTag ff_raw_pixelFormatTags[] = {
     { PIX_FMT_UYVY422, MKTAG('2', 'v', 'u', 'y') },
     { PIX_FMT_UYVY422, MKTAG('A', 'V', 'U', 'I') }, /* FIXME merge both fields */
     { PIX_FMT_YUYV422, MKTAG('y', 'u', 'v', '2') },
+    { PIX_FMT_YUYV422, MKTAG('y', 'u', 'v', 's') },
     { PIX_FMT_PAL8,    MKTAG('W', 'R', 'A', 'W') },
 
     { PIX_FMT_NONE, 0 },

libavformat/isom.c

@@ -64,6 +64,7 @@ const AVCodecTag codec_movvideo_tags[] = {
     { CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', '2') }, /* Uncompressed YUV422 */
     { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'U', 'I') }, /* YUV with alpha-channel (AVID Uncompressed) */
     { CODEC_ID_RAWVIDEO, MKTAG('2', 'v', 'u', 'y') }, /* UNCOMPRESSED 8BIT 4:2:2 */
+    { CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', 's') }, /* same as 2vuy but byte swapped */
 
     { CODEC_ID_V210,   MKTAG('v', '2', '1', '0') }, /* UNCOMPRESSED 10BIT 4:2:2 */