[FFmpeg-trac] #8050(avfilter:new): Active Format Description missing (MPEG-2 and H.264)

FFmpeg trac at avcodec.org
Tue Jul 30 18:18:47 EEST 2019

#8050: Active Format Description missing (MPEG-2 and H.264)
             Reporter:  atorp        |                     Type:
                                     |  enhancement
               Status:  new          |                 Priority:  normal
            Component:  avfilter     |                  Version:  git-
             Keywords:  adf,         |  master
  mpeg2_metadata, h264_metadata      |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
 Summary of the bug:

 When capturing some DVB-S and DVB-T broadcasts, we can see that the
 bitstream of the MPEG-2 and AVC/H.264 services include often the Active
 Format Description (adf):

 This flag is usually transmited in:
 - MPEG-2: As "User Data" section (user id: "DTG1").
 - H.264: As "Auxiliary data" in a SEI unit (user id: "DTG1").

 None of the current mpeg2 and h264 encoders handle that flag. However, as
 the Bitstream Filters for MPEG-2 (mpeg2_metadata) and H.264
 (h264_metadata) can handle different flags similar to this, I request to
 add support for set/get the ADF flag.

 Thank you!

Ticket URL: <https://trac.ffmpeg.org/ticket/8050>
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