[FFmpeg-trac] #9553(avcodec:new): raw h265 file only contains 4 user data SEI even though 6 frames were encoded

[FFmpeg]

#9553: raw h265 file only contains 4 user data SEI even though 6 frames were
encoded
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             Reporter:  david333     |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  avcodec
              Version:  unspecified  |               Resolution:
             Keywords:  h265 SEI     |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Description changed by david333:

Old description:

> I am using ffmpeg version 3.4.1 as a shared library in my project. OS
> version is bionic.
>
> What I am trying to do is encode a raw hevc file with a user data SEI
> message in each frame. I am encoding the file using the ffmpeg API
> instead of the command line interface. The issue I am facing is when I
> encode 6 black frames only 4 out of the 6 encoded video frames contain
> user data SEI messages. It appears that the last two frames in the file
> are always the two frames without user data SEI. I tried doing the same
> thing using h264 and I had no issues, I got 6 encoded frames all
> containing user data SEI.
>
> Also to note, I get two ffmpeg error messages saying "missing picture in
> access unit". Even if I just encode 6 black video frames without user
> data SEI, I still get this error message. Do you know why I might be
> getting this error message and what exactly it’s indicating?
>
> I am using this command "ffmpeg -i mediaFile.hevc -c copy -bsf:v
> trace_headers -f null - 2>tmp_1.txt" to decode and verify all the above
> information.
>
> Was this ever a known bug? If not, are there any suggestions I could try?
> Please let me know if I can provide any other additional information.

New description:

 I am using ffmpeg version 3.4.1 as a shared library in my project. OS
 version is bionic.

 What I am trying to do is encode a raw HEVC file with a user data SEI
 message in each frame using a NVENC gpu. I am encoding the file using the
 ffmpeg API instead of the command line interface. The issue I am facing is
 when I encode 6 black frames only 4 out of the 6 encoded video frames
 contain user data SEI messages. It appears that the last two frames in the
 file are always the two frames without user data SEI. I tried doing the
 same thing using h264 and I had no issues, I got 6 encoded frames all
 containing user data SEI.

 Also to note, I get two ffmpeg error messages saying "missing picture in
 access unit". Even if I just encode 6 black video frames without user data
 SEI, I still get this error message. Do you know why I might be getting
 this error message and what exactly it’s indicating?

 I am using this command "ffmpeg -i mediaFile.hevc -c copy -bsf:v
 trace_headers -f null - 2>tmp_1.txt" to decode and verify all the above
 information.

 Was this ever a known bug? If not, are there any suggestions I could try?
 Please let me know if I can provide any other additional information.

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Ticket URL: <https://trac.ffmpeg.org/ticket/9553#comment:3>
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