LipSyncSnip.bat

@echo off

REM get video id
REM tMwhl4IrPNc
set /p VID=Enter Video ID:

REM download the file or playlist
SET start=https://www.youtube.com/watch?v=
SET url=%start%%VID%

youtube-dl --extract-audio --audio-format wav --audio-quality 0 --yes-playlist -o %%(id)s.%%(ext)s %url%

REM get start and end times
REM 00:31
set /p START=Enter clip start time MM:SS:
REM 00:49
set /p END=Enter clip end time MM:SS:

REM trim the file down to size
ffmpeg -i %VID%.wav -ss 00:%START%.00 -to 00:%END%.00 -c copy %VID%trim.wav

REM get the length of the clip
ffprobe -i %VID%trim.wav -show_entries stream=codec_type,duration -of compact=p=0:nk=1

REM get fade times
REM 1
set /p FADEIN=Enter fade in duration:
REM 17
set /p FADEOUTS=Enter fade out start time:
REM 1
set /p FADEOUTD=Enter fade out duration:

REM filter fade in and out
ffmpeg -i %VID%trim.wav -af "afade=t=in:st=0:d=%FADEIN%,afade=t=out:st=%FADEOUTS%:d=%FADEOUTD%" %VID%clip.wav