write bitrate tag

Originally committed as revision 16928 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/mxfenc.c

@@ -188,6 +188,8 @@ static const MXFLocalTagPair mxf_local_tag_batch[] = {
     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */
     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */
     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */
+    // MPEG video Descriptor
+    { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */
 };
 
 static void mxf_write_uuid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
@@ -595,7 +597,7 @@ static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)
     AVRational dar;
     int f1, f2;
 
-    mxf_write_generic_desc(pb, st, mxf_mpegvideo_descriptor_key, 149);
+    mxf_write_generic_desc(pb, st, mxf_mpegvideo_descriptor_key, 157);
 
     mxf_write_local_tag(pb, 4, 0x3203);
     put_be32(pb, st->codec->width);
@@ -609,6 +611,10 @@ static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)
     mxf_write_local_tag(pb, 4, 0x3208);
     put_be32(pb, st->codec->height>>sc->interlaced);
 
+    // bit rate
+    mxf_write_local_tag(pb, 4, 0x8000);
+    put_be32(pb, st->codec->bit_rate);
+
     // frame layout
     mxf_write_local_tag(pb, 1, 0x320C);
     put_byte(pb, sc->interlaced);