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

Gyan Doshi gyandoshi at gmail.com
Wed May 9 11:29:08 EEST 2018

On 5/9/2018 1:51 PM, Gareth Fakouri wrote:
> 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'.

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

I think so. You can skip the quotes surrounding


Alternatvely, the escape character for PS is ` (grave accent, above Tab 
key). So you can also try



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