[FFmpeg-trac] #11056(avformat:closed): Position of key frame incorrect

[FFmpeg]

#11056: Position of key frame incorrect
-------------------------------------+-------------------------------------
             Reporter:  David        |                    Owner:  (none)
  Johansen                           |
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:  avformat
              Version:  6.1.1        |               Resolution:  invalid
             Keywords:  ffprobe pos  |               Blocked By:
  mp4                                |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Changes (by mkver):

 * status:  new => closed
 * resolution:   => invalid

Comment:

 There is 0x00015827 at offset 931036. This corresponds to a NAL unit with
 size 88103 which fits nicely with the packet size 88107 as reported by
 ffprobe. There is 0x0000047C at offset 930976. This is already invalid
 with a NALU length size of two. With a NALU length size of three, this
 would be a NALU with nal_unit_type 28 -- one of the unspecified ones. The
 next NALU would then have a size of 0x340000, which is larger than the
 whole file. With a nal unit length size of four, the next NALU has a
 length of more than 2GiB.

 To sum it up, your offset 930976 (for which you provided no real
 explanation) is just wrong.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/11056#comment:9>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker