Hi, I recently discovered that iPad 3 is pretty bad with mkv especially 1080p. though EC Player plays everything quite nice, its not always perfect, so i tried to convert mkv to mp4 with handbrake and iVI - but it takes Aaaaages... then i heard that there is a possibility of simple container change, or remuxing mkv to mp4 in other words. the problem! i tried that - and...it still plays crapppy. so i figured that there is some kind of profile incompatibility. i know that maximum h264 profile iPad can natively play is High@4.1 i do have files with profile firstname.lastname@example.org and lower - but as i mentioned early the result was not positive - did not play natively , and play back was as horrible as playing the original mkv. so i guess profile is not the only thing that effects compatibility... i thought that audio might be a problem (most of my stuff is 5.1 dts) so i tried to recode the audio to 2 channel AAC 160kbps. it did not help. so what am i missing? basically my question is - what am i doing wrong, and how to know if an mkv will remux good in advance (if such a thing is possible at all). info about my computer: mac mini 2.7ghz i7, 8gb ram, osx lion 10.7.4 program i used for remuxing is MP4tools. Thanks in advance!