ffmpeg easy install for users

[Tom-Neverwinter]

Describe the feature you'd like
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from sad talker

Install Python 3.10.6, checking "Add Python to PATH".
Install git manually (OR scoop install git via scoop).
Install ffmpeg, following this instruction (OR using scoop install ffmpeg via scoop).
Download our SadTalker repository, for example by running git clone https://github.com/Winfredy/SadTalker.git.
Download the checkpoint and gfpgan below↓.
Run start.bat from Windows Explorer as normal, non-administrator, user, a gradio WebUI demo will be started.

[jhj0517]

Hi, I don't understand how SadTalker is related to this, but it would definitely be more convenient if users could install ffmpeg directly through install.bat.
But since ffmpeg provides different setup instructions for each OS in here: https://ffmpeg.org/download.html, I couldn't find a better way than this for now.