Muxer mxf_opatom [MXF (Material eXchange Format) Operational Pattern Atom]:
    Common extensions: mxf.
    Mime type: application/mxf.
    Default video codec: dnxhd.
    Default audio codec: pcm_s16le.
MXF-OPAtom muxer AVOptions:
  -mxf_audio_edit_rate <rational>   E........ Audio edit rate for timecode (from 0 to INT_MAX) (default 25/1)
  -signal_standard   <int>        E........ Force/set Signal Standard (from -1 to 7) (default -1)
     bt601                        E........ ITU-R BT.601 and BT.656, also SMPTE 125M (525 and 625 line interlaced)
     bt1358                       E........ ITU-R BT.1358 and ITU-R BT.799-3, also SMPTE 293M (525 and 625 line progressive)
     smpte347m                    E........ SMPTE 347M (540 Mbps mappings)
     smpte274m                    E........ SMPTE 274M (1125 line)
     smpte296m                    E........ SMPTE 296M (750 line progressive)
     smpte349m                    E........ SMPTE 349M (1485 Mbps mappings)
     smpte428                     E........ SMPTE 428-1 DCDM
  -store_user_comments <boolean>    E........  (default true)


