Hi, this is a really great codec wrapper. Thanks for including export to MP4. It would be really great if you could also encode audio to AAC with different settings and mux the two to mp4, mkv, etc. Maybe with an option to leave the premuxed files or delete them (default), and to delete the avi file too. Right now my audio is going into the avi as wav, which I manually encode as aac and mux. My currently most used delivery is h264 and aac in an mp4 container.