How to use handbrake to convert MKV to MP4?

if you want to do extra editing, you have to use other conversion programs like ipad video converter.It can convert various videos to mp4 format, and also adding subtitles, cut black bar,etc. http://www.dvd-to-iphone4.com/ipad-video-converter.html This program really works well for me all the time. maybe u could have a try. hope it help.

Aunsoft MKV Converter - the top MKV Files Converter, MKV Files Editor that can play MKV files fluently, convert MKV files to lossless video/audio formats, split big MKV files into small one, join/combine MKV files into only one, edit MKV files by cropping, effecting, etc. It supports converting MKV to AVI, MKV to MPEG, MKV to DVD VOB, MKV to WMV, MKV DTS to AC3, MKV to MOV, MKV to FLV, MKV to DivX, MKV to MP4, MKV to MP3, MKV to AAC, MKV to WAV, MKV to WMA, MKV to PSP, MKV to iPad, MKV to Apple TV, MKV to iPod, MKV to iPhone 4,MKV to PS3, MKV to Android Phones, MKV to HTC Legend, MKV to HDTV, MKV to Xbox XBMC, etc. The program also takes full advantage of a wide range of settings to assist your MKV file conversion: You can preview MKV videos, take immediate snapshot of each MKV file, cut black edges from MKV video, add effect to MKV files, adjust A/V parameters for output format and more. http://www.aunsoft.com/mkv-converter/

using Windows Movies Maker, it is a free powerful video movies editor tool. so it can help you to edit your video, but if you need a converter, i would recommend you PCHand Media Converter Pro. i am using it and It works good for me. As an all-in-one converter, it supports any popular video conversion. It lets you convert videos directly for use with windows movies maker, iPad, iPod, iPhone 4, Apple TV, or other devices. Easily convert videos to almost any format of your choice, including MP4, MOV, AVI, WMV, FLV, MPG, 3GP etc. You could learn more from this link:http://www.pc-hand.com/media-converter-pro.html