[HELP] how to encode AVS2 to H265 video?

[Selur]

[vist#0:0/avs2 @ 00000213f464ed40] Decoding requested, but no decoder found for: avs2

indicates that the avs2 decoder is missing.
Assuming you did update to the dev when I told you the second time, this is strange, since for me calling 'ffmpeg -decoders' on the ffmpeg version which comes with that dev version I see:

...
V....D avs                  AVS (Audio Video Standard) video
V..... libdavs2             libdavs2 AVS2-P2/IEEE1857.4 (codec avs2)
V....D libuavs3d            libuavs3d AVS3-P2/IEEE1857.10 (codec avs3)
...
V....D cavs                 Chinese AVS (Audio Video Standard) (AVS1-P2, JiZhun profile)
...

so avs2 should be supported through the in ffmpeg binary included libdavs2.
=>

1. make sure you use the latest dev, update if not
   
2. if that does not work call:
   
   "C:\Program Files\Hybrid\64bit\ffmpeg.exe" -decoders
   and check that the above-mentioned decoders are listed.
   

Cu Selur