Add SLDV FourCC for dvvideo.

libavformat/riff.c

@@ -119,6 +119,7 @@ const AVCodecTag ff_codec_bmp_tags[] = {
     { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'c', 's') },
     { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'h', '1') },
     { CODEC_ID_DVVIDEO,      MKTAG('S', 'L', '2', '5') },
+    { CODEC_ID_DVVIDEO,      MKTAG('S', 'L', 'D', 'V') },
     { CODEC_ID_MPEG1VIDEO,   MKTAG('m', 'p', 'g', '1') },
     { CODEC_ID_MPEG1VIDEO,   MKTAG('m', 'p', 'g', '2') },
     { CODEC_ID_MPEG2VIDEO,   MKTAG('m', 'p', 'g', '2') },