Since fMMS receives it one *could* argue it's the other phone that is the problem... Seriously though, there is a reason it says "Tap to add image", the SMIL being generated tells the other phone it's an image, so if a video shows up there instead theres no telling what happens (if the phone even accepts the video, as it might be the wrong format to begin with). Thanks for looking in to mencoder and experimenting with it