Ffmpeg Download Batch Files

[gufoli]

Hi guys, I have created a list of files
myFileList.txt

url.m3u8
url.m3u8
url.m3u8

to download with ffmpeg this is the line:

setlocal enableelayeexpansion
set index=0
for /f "delims=" %%i in (myfilelist.txt) do (
set /a index+=1
ffmpeg.exe -i %%i -c copy "new folder%%~ni.mp4"
)

downloads the first file, but the second one is overwritten, because it doesn't change the name.
How can I do for example to get
01.mp4
02.mp4
03.mp4
etc.
thanks, for any help.

[lomero]

%%(title)s.%%(ext)s