set index duration to 0 for cbr, specifying whole container coverage

Originally committed as revision 19338 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/mxfenc.c

@@ -1072,6 +1072,9 @@ static void mxf_write_index_table_segment(AVFormatContext *s)
 
     // index duration
     mxf_write_local_tag(pb, 8, 0x3F0D);
+    if (mxf->edit_unit_byte_count)
+        put_be64(pb, 0); // index table covers whole container
+    else
         put_be64(pb, mxf->edit_units_count);
 
     // edit unit byte count

tests/lavf.regression.ref

@@ -12,7 +12,7 @@ bfdec98337e6a9d89dc648d1e65a41db *./tests/data/b-lavf.mpg
 dfae2e9e7572c000bec1edb8ea3e6cf3 *./tests/data/b-lavf.mxf
 535097 ./tests/data/b-lavf.mxf
 ./tests/data/b-lavf.mxf CRC=0xd7ff387d
-0cf22217d46b55c4fd178890305f9025 *./tests/data/b-lavf.mxf_d10
+8e70bc1e7602bb07f02159d1a2dd69cd *./tests/data/b-lavf.mxf_d10
 5330989 ./tests/data/b-lavf.mxf_d10
 ./tests/data/b-lavf.mxf_d10 CRC=0xd241c8b6
 2e9bd99fbb121ae4887109e3a4169acd *./tests/data/b-lavf.ts