Hi All, I've been searching for a while and I cannot find a solution to this predicament, I am hoping the experts on this forum can provide me with some advice. I've converted my movie library to MP4/M4V for use with the appletv2, however I just realized that AAC 6 channels does not give me Dolby Digital on my receiver (I only get Pro Logic). Apparently I need AC3 - 6 channels and AAC 2 Channel to get Dolby Digital. I tried using MP4 tools but I am getting a lot of errors (its the registered version). Any ideas on software (Mac or PC) that can do this for me without re-encoding the video (batch encoding required).