How to batch extract audio from avi files?

[Nico Darko]

Hi,

I'd like to extract the audio from several avi files in one batch, without converting them. I think I can do that with FFmpeg, but what would be the command line?

Thank you.

[sekininsha]

try ...

for %%a in ("*.avi") do ffmpeg -i %%a -vn -c:a copy -y %%~na.ac3

pause

[Nico Darko]

Thanks, I've changed ac3 to mp3 (that's the audio format for all of them) but it doesn't work in both cases, it says "no such file or directory".

[sekininsha]

The names of the avi files must be without spaces ..

[Nico Darko]

Thanks, it's working now!

[Nico Darko]

I get this for certain files though: "Audio packet of size 21153 (starting with 0000000...) is invalid, writing it anyway."

[Nico Darko]

I get this for certain files though: "Audio packet of size 21153 (starting with 0000000...) is invalid, writing it anyway."

Do you know what that means?