[FFmpeg-trac] #9146(undetermined:new): ffmpeg gives different value of color_trc if video stream contains an atc sei for mp4 and ts file

[FFmpeg]

#9146: ffmpeg gives different value of color_trc if video stream contains an atc
sei for mp4 and ts file
-------------------------------------+-------------------------------------
             Reporter:  a1q123456    |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  4.2          |               Resolution:
             Keywords:  hevc hlg     |               Blocked By:
  color_trc                          |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by Balling):

 Are we even conformant to ETSI TS 101 154, v2.5.1 (2019-01) that does this
 magic stuff?

 "For other broadcasts systems, an EOTF VUI value of 14, as per ETSI TS 101
 154, v2.5.1 (2019-01)
 (and optionally 1, 6, or 15) may provide the best base-layer SDR backward-
 compatible HLG
 signaling when used with the alternative_transfer_characteristic SEI
 message, at every
 random access point, with the preferred_transfer_function set to 18, as
 per ETSI TS 101
 154, v2.5.1 (2019-01). Note that BT Report 2390 defines a bridge point for
 translation of PQ and
 HLG at a luminance of 1,000 cd/m2. The recommended chroma sample location
 type VUI is 0
 (center-left)"

--
Ticket URL: <https://trac.ffmpeg.org/ticket/9146#comment:1>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker