I've been ripping DVDs and BDs to MP4 for use on a server upon which I run Plex. I've been using AAC and 5.1 @ 384kbps. I had some issues with muting, etc. and that's all that would work. I've used my copies on tablets, phones, PCs and Roku devices with great success. Finding some difficulty with Sicario I came here to poke around. Doing so introduced me to Cinavia problems. I solved my problem with Sicario but was now concerned about Cinavia protection. I therefore found the checkbox in AnyDVDHD to check for removal of Cinavia and changed the audio in CloneBD to AC3. The resulting .MP4 file had no sound. When I returned it to AAC the sound was just fine. So I have some questions. 1. Does conversion to .MP4 inherently remove Cinavia or should I assume it's present on a number of my previous rips? 2. Everything here says to convert to AC3. Shall I assume I've not removed Cinavia from Sicario in this case? 3. If I burned an .MP4 file to a disc and put it in a commercial player would the protection prevent proper playback? Anyone have any other insights as well? Thanks!