However, if you only need to convert the MKV file as is, then open the Summary tab and select MP4 under Format. Under Save As, add a filename then click Browse to set a destination. When you’re ready, click Start Encode. Handbrake will begin converting your file to MP4. The larger your video files, the longer it will take Handbrake to convert. I simply want to convert files, any format to any format (at the moment, I need to convert MKV to MP4-h264), without losing quality. I don't want to resize (scale) the video, I don't want to change its aspect ratio and I don't want it to lose quality (this is very important); all I want is "to change the format", that's all. Actually, there are two ways for MKV to MP4 conversion: convert MKV to MP4 with or without re-encoding. Only if you convert video without re-encoding - what we call remuxing MKV to MP4, you can get MKV to MP4 converted without losing quality. Programs like Winxvideo AI and Xmedia Recode can remux MKV to MP4 easily. Step 1: Open up the VLC media player. Click Media > Convert/Save > +Add to import the MKV video files. Step 2: Click on the Convert/Save button to open up a new panel named Convert. Step 3: Click on the wrench icon to enter the profile edition panel, and select AVI as the encapsulation format. Some players support external .srt files instead. Then you must convert the subtitle to an .srt file (open .mkv in SubtitleEdit, select subtitle and save as .srt). Name the .srt exactly as the .mp4 except the file extension. If none of the above works you need to burn-in the subtitles. You can do that in HandBrake by going to the subtitles tab Use XMedia Recode, select MP4 as the output container, then Copy rather than Convert, for the video and audio tracks. If XMedia only offers Convert for a particular video or audio track, it means the MP4 container does not support that format, and it must be converted. nmkd. • 2 yr. ago. MKV contains video, audio, and text files. You can upload MKV files to Facebook and YouTube, but not to mobile-based social media platforms like Instagram. It is compatible with VLC media player. The Matroska Video or MKV supports an unlimited number of video, audio, and subtitle tracks. It is free to use and is best for independent creators. Step 2 Click Media on the top-left menu bar and then choose the Convert/Save option from the drop-down list. Then click the Add button on the right to import the video you want to convert to MP4. Step 3 Click the Convert/Save button and choose the Convert option. Then click Profile to set MP4 as the target format. Step 1. Load source MKV video or folder. Click "Source" button to select and open a single MKV file or a folder with one /more MKV video files. Click "Browse" button to set a destination folder to store the converted file. Step 2. Choose MP4 as output and set video quality. Let's see how to convert MKV to MP4 using TunesKit Video Converter. Step 1: Drag and drop the MKV file to TunesKit Video Converter, or click the Add File button to add your video files to it. Step 2: If you have no need to edit your video, skip to Step 3. TunesKit Video Converter has a built-in tiny video editor that supports simple video editing. 1S5k.