avformat/mxfenc: Only store user comment related tags when needed

Also support disabling them as they seem to cause problems to some
Users. They are also not allowed in IRT D-10 thus the default for
mxf_d10 is not to write them

This also decreases the filesize when no user comment are stored

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

1 files changed, 15 insertions, 0 deletions

diff --git a/doc/muxers.texi b/doc/muxers.texi
index 06483fa4ae..b6d88231ac 100644
--- a/doc/muxers.texi
+++ b/doc/muxers.texi
@@ -874,6 +874,21 @@ ffmpeg -i file.mpg -c copy \
      -y out.ts
 @end example
 
+@section mxf, mxf_d10
+
+MXF muxer.
+
+@subsection Options
+
+The muxer options are:
+
+@table @option
+@item store_user_comments @var{bool}
+Set if user comments should be stored if available or never.
+IRT D-10 does not allow user comments. The default is thus to write them for
+mxf but not for mxf_d10
+@end table
+
 @section null
 
 Null muxer.