[FFmpeg-trac] #6476(avcodec:new): NVENC: "InitializeEncoder failed" error occurs when level 5.2 is specified

[FFmpeg]

#6476: NVENC: "InitializeEncoder failed" error occurs when level 5.2 is specified
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             Reporter:  alexpigment  |                    Owner:
                 Type:  enhancement  |                   Status:  new
             Priority:  wish         |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  nvenc        |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by hydra3333):

 Sadly, no I am not sure.   I do want to encode 4k using an nvidia 2060
 Super which I gather goes beyond level 5.1 and I have to leave off -level.

 The h.264 spec https://en.wikipedia.org/wiki/Advanced_Video_Coding#Levels
 says it goes to level 6.2,

 and the constants in https://github.com/FFmpeg/nv-codec-
 headers/blob/master/include/ffnvcodec/nvEncodeAPI.h specify up to 5.2 (it
 may be greater now with newer cards/drivers),

 however here
 https://github.com/FFmpeg/FFmpeg/blob/master/libavcodec/nvenc_h264.c (at
 least) it specifies only to level 5.1,

 Thus there seems to be some inconsistency at present.

 I'm unsure if the code otherwise checks and constrains it to what a driver
 may report (not sure where to look for that).

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Ticket URL: <https://trac.ffmpeg.org/ticket/6476#comment:6>
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