R2 beta2 : export NVENC with variable bit rate : Unable to create encoder instance

Please tell me your exact encoder settings.

Selecting "Level 1" is the problem.

Level 1:

Max. Bitrate: 64 kbit/s

Max. Resolution: 128x96 (176x144)

12 Mit/s exceeds the max. allowed bitrate. Also the resolution is too high. If you deselect "level 1" everything works.

Ok, found the reason: Your configuration does not comply to level 4.1. It needs at least level 5. Why is that?

When not selecting any preset h264_nvenc takes "medium" as default.

h264_nvenc AVOptions:
-preset            <int>        E..V.... Set the encoding preset (from 0 to 11) (default medium)
   default                      E..V....
   slow                         E..V.... hq 2 passes
   medium                       E..V.... hq 1 pass
   fast                         E..V.... hp 1 pass
   hp                           E..V....
   hq                           E..V....
   bd                           E..V....
   ll                           E..V.... low latency
   llhq                         E..V.... low latency hq
   llhp                         E..V.... low latency hp
   lossless                     E..V....
   losslesshp                   E..V....

A preset is a combination of (all) other single available options. So in fact if you don't specify any options, the encoder still does that internally without letting you know it. And this options by default require level 5.

I admit this is a bit confusing but I can not change this. This is happening in the NVIDIA driver software. But I changed the text of the error message:

Yes! Select a level only if you target hardware decoders. If you upload your video to YouTube, Vimeo or something it is not necessary.