"I have a sizable amount of .mkv files and would like to play them on my iPad. However, iPad seems to have no support for MKV videos. How do I convert MKV to MP4 which can be played on not only iPad but also Xbox, PS3, Android phone and more devices?"
No worries. Converting MKV files to MP4 is an easy-accomplished task supported you take advantage of some video converter programs. The one that constantly get recommended by my friends is Video Convert for Mac (from Tenorshare). The smart video converter supports to convert videos to and from any common formats (including HD video formats).
Guide: How to Convert .MKV Files to MP4 on OS X
Download the MKV to MP4 converter to your Mac (OS X 10.10 Yosemite, 10.9 Mountain Lion, 10.8 and earlier) and follow the tutorials. You can freely import MKV videos and convert them to most frequently-used portable devices such as Android phone, iPhone, iPad, etc.
1) Click "Add Files" to import .mkv video files you want to convert, or simply drag video files to the main interface of the converter. Video Converter for Mac enables you to convert multiple videos at the same time.
2) After importing MKV videos, set output format to MP4 on the left pane. You can get the format window by clicking on the drop-down button.
Video converter for Mac enables you to specify settings of converted videos. Click on "Settings" to set video parameters such as codec, frame rate and biter rate.
3) At last, Hit "Convert" let this smart Video Converter for Mac to do the rest for you!
When the conversion is done, you can play output MP4 videos on your Mac, edit them in iMovie, Final Cut Pro, or put them on your iPod for playback anytime you want.