set mime type for mxf

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@17207 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavformat/mxfenc.c

@@ -1887,7 +1887,7 @@ static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int
 AVOutputFormat mxf_muxer = {
     "mxf",
     NULL_IF_CONFIG_SMALL("Material eXchange Format"),
-    NULL,
+    "application/mxf",
     "mxf",
     sizeof(MXFContext),
     CODEC_ID_PCM_S16LE,