[FFmpeg-trac] #4592(undetermined:new): Sony mxf file fails to decode

[FFmpeg]

#4592: Sony mxf file fails to decode
-------------------------------------+-------------------------------------
             Reporter:  cehoyos      |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:  mxf h264     |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by Tjoppen):

 Some quick analysis:

 {{{
 $ mxfdump sonyx180-1080-i50.MXF
 Dump an MXF file using MXFLib
 - using dictionary "dict.xml"
 ERROR: Cannot find valid key in first 65536 bytes of file
 "sonyx180-1080-i50.MXF"
 sonyx180-1080-i50.MXF: Success
 }}}

 mxfdump doesn't seem to think it's an MXF file. Let's have a quick look
 with a hex editor:

 {{{
 0000 0000: 06 0E 2B 34 02 05 01 01  0D 01 03 01 04 01 01 00  ..+4....
 ........
 0000 0010: 83 00 00 39 5E 04 00 00  00 00 00 06 0E 2B 34 04  ...9^...
 .....+4.
 0000 0020: 01 01 03 0D 01 03 01 02  7F 01 00 00 00 00 00 00  ........
 ........
 0000 0030: 00 00 00 00 00 00 00 00  00 00 00 00 81 06 31 21  ........
 ......1!
 }}}

 Looks like there's two ULs here. There first one (at 0000 0000) seems to
 be an UMID, while the second one (at 0000 001B) is "MXF-GC Generic Essence
 Multiple Mappings". In other words, this is just an SMPTE generic essence
 container. There's no header, footer or index to help demux the file and
 it is not MXF. Indeed, ffmpeg considers it raw H.264, not MXF.

 I suggest working out the format for yourself, then writing a simple
 little tool to split it up into raw video and audio.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/4592#comment:2>
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