Add xd55 codec tag for XDCAM HD422 720p25 CBR files.

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

libavformat/isom.c

@@ -157,6 +157,7 @@ const AVCodecTag codec_movvideo_tags[] = {
     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'n') }, /* MPEG2 IMX NTSC 525/60 30mb/s produced by FCP */
     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'p') }, /* MPEG2 IMX PAL 625/50 30mb/s produced by FCP */
     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', '4') }, /* XDCAM HD422 720p24 CBR */
+    { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', '5') }, /* XDCAM HD422 720p25 CBR */
     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', '9') }, /* XDCAM HD422 720p60 CBR */
     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'a') }, /* XDCAM HD422 720p50 CBR */
     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'b') }, /* XDCAM HD422 1080i60 CBR */