What is this " DAIN frame interpolation DL algorithm"?

[APISeeker]

I saw in the readme at the end there is a mention of an "extension" for sadtalker, one the english version is here (https://github.com/gauravk95/SadTalker-Video), I am wondering, is this implemented in the latest versions of sadtalker or not? the extension seems to be using old sadtalker models but introduces the new "DAIN" algorithm, so I have no idea what to do of it.

I was not even able to run that repo, because of some error related to CUDA versions and Paddle..or paddlegan

(PreconditionNotMetError: The third-party dynamic library (cudnn64_7.dll) that Paddle depends on is not configured correctly. (error code is 126)
Suggestions:
1. Check if the third-party dynamic library (e.g. CUDA, CUDNN) is installed correctly and its version is matched with paddlepaddle you installed.
2. Configure third-party dynamic library environment variables as follows:
- Linux: set LD_LIBRARY_PATH by export LD_LIBRARY_PATH=...
- Windows: set PATH by `set PATH=XXX; (at ..\paddle\phi\backends\dynload\dynamic_loader.cc:305)
[operator < load_combine > error])
mentioned here and here
(PaddlePaddle/PaddleDetection#2044)
(PaddlePaddle/Paddle#53009)
(PaddlePaddle/PaddleOCR#1081)

1. can someone tell me more about it?
2. Anyone has a method to solve this?