I have a bunch of mkv files that I'm trying to convert their audio while copying the video with this command:
for %i in (*.mkv) do ffmpeg -i "%i" -c:a aac -ar 44100 -b:a 128k -c:v copy "?"
I want ffmpeg to rename the output files into either "output1.mkv" "output2.mkv" etc or to copy the source names and add converted to them, for example, "X.mkv" into "X converted.mkv" etc.