[FFmpeg-trac] #3087(avcodec:open): Suspicion that valid random access point is not marked as keyframe in AVCHD samples from Panasonic Lumix GH1 (1080i material)

[FFmpeg]

#3087: Suspicion that valid random access point is not marked as keyframe in AVCHD
samples from Panasonic Lumix GH1 (1080i material)
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             Reporter:  rmk          |                    Owner:  (none)
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  h264 bounty  |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Balling):

 >checked by cutting off the beginning of the file until the packet start
 of such a frame and it decodes fine

 How can you be sure that it decodes fine? Does it decode BITPERFECT? Then
 it is not a recovery point, recovery point does not usually decode
 bitperct, just very close.

 >I don't know if it has anything to do with it but this material is
 progressive segmented frame (i.e. progressively scanned but encoded as
 field pictures).

 This is just the same as soft telecine, PsF that is. Yet I think only HEVC
 has such a concept reintroduced, no? Anyway, we do not support such hevc
 files. Full stop. Someone recheck the avc spec.
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Ticket URL: <https://trac.ffmpeg.org/ticket/3087#comment:11>
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