add hdv2 fourcc to MPEG2 codec mapping

Originally committed as revision 4412 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/mov.c

@@ -118,6 +118,7 @@ static const CodecTag mov_video_tags[] = {
     { CODEC_ID_QTRLE, MKTAG('r', 'l', 'e', ' ') }, /* Apple Animation (RLE) */
     { CODEC_ID_QDRAW, MKTAG('q', 'd', 'r', 'w') }, /* QuickDraw */
     { CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') }, /* AVC-1/H.264 */
+    { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '2') }, /* MPEG2 produced by Sony HD camera */
     { CODEC_ID_NONE, 0 },
 };