I've tried to batch convert some mkv video files with EAC3 audio to AC3 audio. I've used a method that has worked before converting FLAC to MP3 stereo but this time my export multiple procedure gives me 6 files for each mkv - i.e. one file per track. And each of these files is about the same size i expected the 5.1 file containing all 6 tracks to be.

So am i not following the correct procedure, or is there a way of combining the six separate files for every mkv into a 5.1 file?

Hope i've explained that well enough and thanks for any replies.