"Ive done a fair bit of googling to try to find out if the Tab can play mkv files out of the box, all i find is links discussing how to convert mkv files to mpeg to be played back. What id like to know please is if the Tab can play them without converting, i am talking about a standard say 720p mkv video file. If 1080p, better. thanks in advance : from thegalaxytabforum.com We know Samsung Tablet support 1080p and but the 1080p should be MP4 format. The Samsung GALAXY Tab's built-in video player has multi-codec support without re-encoding which enables playback of MPEG4, H.263, H.264, Divx/Xvid files without conversion.for MKV format, nether the format nor the high 1080p. So play MKV HD on it is just one of Tablet playing issue. When we put MKV downloaded on-line or ripper from our Blue ray DVDs to Samsung Galaxy Tab for playing we meet the problem of no sound with video perfect, just 720p effect or bitrate problem. The best way to play Full HD 1080p MKV on Galaxy Tab 10.1 is to convert MKV HD files to Galaxy Tab native MP4 (H.264 encoded) in 1080p, so we can get the best 1080p HD quality without video resetting problem on bitrate, file size or frame. And the toolkit we need is Mac MKV to Samsung Galaxy Tab Converter, it can help convert MKV to Full HD 1080p 30fps Galaxy Tab in a breeze. Tutorial of converting HD MKV to Samsung Galaxy Tab 1080p MP4: Step 1: Input HD MKV from PC HD to MKV to Samsung Galaxy Tab Converter. You can add one or several files at one time. Step 2: Select special MP4 Output Video Format for Samsung Galaxy Tab Click the small down arrow at the very right of the "Profile" to open the Profile drop-up list to choose MP4as output video format. Step 3: Do the 1080p resolution setting. Here to see the resolution of original MKV files, If the MKV is already 1080p, then do nothing, if not, adjust it to 1080p. And the default frame should be 30 fps. If your MKV file is not the number, reset it to 30. Step 4: Start to Convert HD MKV to Samsung Galaxy Tab Press "Start" button to enter the conversion interface. When the conversion finished, you can use the USB data wire way to import MP4 1080p video to tablet for direct playing.