[FFmpeg-user] forfiles - ffmpeg -Volume Filter not recognised

[Gareth Fakouri]

I am trying to run a batch conversion using ffmpeg and for files. It does work except when i include the volume filter. Works fine with the quality filter on it's own.

PS C:\Users\garet\Videos\Cobra> forfiles /c "cmd /c ffmpeg -i @FILE -filter:a "volume=3" -c:v libx264 -preset ultrafast @FNAME.mp4"
ERROR: Invalid argument/option - 'volume=3 -c:v libx264 -preset ultrafast @FNAME.mp4'.
Type "FORFILES /?" for usage.

The bold and underlined section is the offending part. The code runs fine minus this part using for files. Doing the files one at a time works fine using that volume filter syntax.

Maybe quotes within quotes is the problem??????????????

I have no idea really, any help would be appreciated.

Cheers

Gareth