I was using a script to batch re-encode audio to AAC using the libvo-aac encoder.
@ECHO OFF FOR %f IN (*.mkv) DO call ffmpeg.exe -i "%f" -c:v copy -c:a libvo_aacenc -b:a 256k "%f"
However since I am on windows building ffmpeg with fdk-aac is a bit of a pain and qaac is regarded as the superior encoder I would like to pipe ffmpeg to use qaac instead.
I am not too knowledgeable about ffmpeg but I did find a comment here: How to use ffmpeg to downmix 5.1 DTS HD MA or Dolby TrueHD to stereo AAC with Dolby Pro Logic II? (last comment)
after trying that command I receive this error:
ERROR: CoreAudioToolbox.dll: The specified module could not be found.
However I do indeed have quicktime and Apple Application Support installed as well as the flac and libsnd libaries in the ffmpeg folder.
I'm using the Zeranoe Windows x64 Static build
EDIT: I got it working with the 32bit qaac and flac libraries but It still won't work with the 64 bit versions.