[FFmpeg-trac] #5879(avformat:new): Remove all metadata does not work with MKV files

FFmpeg trac at avcodec.org
Sun Jan 8 17:40:18 EET 2017

#5879: Remove all metadata does not work with MKV files
             Reporter:  Kdmeizk      |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  avformat
              Version:  git-master   |               Resolution:
             Keywords:  mkv          |               Blocked By:
  regression                         |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |

Comment (by Kdmeizk):

 Since mkvmerge is the possible reference here, I checked with the version

 With {{{mkvmerge -o out.mkv in.mkv}}}, there is no '''DURATION''' fields
 while ffmpeg does it.

 But the main information I retained is in their documentation
 (https://mkvtoolnix.download/doc/mkvmerge.html#d4e535), you can see for
 the {{{--enable-durations}}} option:

 > Write durations for all blocks. This will increase file size and does
 not offer any additional value for players at the moment.

 So if {{{-map_metadata -1}}} is not the original way to avoid the write of
 these '''DURATION''' fields (that I believe I understood from your
 answer), is it possible to do something (you or me) to avoid the use of
 mkvmerge in addition to ffmpeg to fix this problem?

Ticket URL: <https://trac.ffmpeg.org/ticket/5879#comment:4>
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