I need to export AAF file but I haven’t found any information about it, no one talks about it
Is this a Kdenlive question? I think Kdenlive does not support AAF.
If ffmpeg does not support aaf then kdenlive cannot export aaf either.
Depending on your audio software, you might wanna try by simply opening the videofile in it.
That is what I do when I need to edit the audio on my old super 8 movies.
I can easily open the file in Audacity for instance.
Might not be the answer you were looking for but I figured it was worth mentioning.
Why do you need to export in AAF? Audacity Audio editor supports importing many audio formats through its use of the ffmpeg plugin.