[FFmpeg-user] Remove "DOVI configuration record" from h265 streams

[Oliver Fromme]

I've got another question about HDR re-encoding.

There are "hybrid" files that contain both Dolby Vision (DoVi) and
HDR10 (or even HDR10+) metadata at the same time.  I don't care about
the DoVi metadata, so I just remove it.  I only encode with the HDR10
metadata.  The resulting files play fine with mpv.

However, when I look at the resulting file (h265 within mkv) with
ffprobe, it still displays a side_data record for the video stream
that has the type "DOVI configuration record".  Excerpt of ffprobe
for the video stream (JSON format):

  'streams': [
    {
      [...]
      'codec_long_name': 'H.265 / HEVC (High Efficiency Video Coding)'
      [...]
      'side_data_list': [
        {
          'bl_present_flag': 1
          'dv_bl_signal_compatibility_id': 1
          'dv_level': 6
          'dv_profile': 8
          'dv_version_major': 1
          'dv_version_minor': 0
          'el_present_flag': 0
          'rpu_present_flag': 1
          'side_data_type': 'DOVI configuration record'
        }
      ]
      [...]
    }

The video is definitely *not* Dolby Vision, it does not contain any
BL or RPU data or anything else.  Therefore I would like to get rid
of that "DOVI configuration record" because it might confuse certain
players.

How to do that?

During my research I noticed that ffmpeg has a multimedia filter
named "sidedata".  It's supposed to be able to delete side data from
frames.  However, the documentation (manual page) refers to the
AVFrameSideDataType enum in libavutil/frame.h that conatins all
AV_FRAME_DATA_* values.  But that enum does not contain an entry for
DoVi configuration records.  So it must be something else.

Best regards
Oliver