EDIT: I tried VLC as suggested by @Daniel. It was almost perfect. It was fast and user friendly. I just had to click on "Convert / Save", add the input file, select the MP4 profile, configure Video codec and Audio codec to "Keep original video / audio track", choose a destination file, and click on "Start". After you have changed the aspect ratio in VLC, you need to save the video as a new file. To do this, you need to go to Media > Convert / Save. A new window will open with a tab called File. Here Playback of video and audio files are the bread and butter. But that's not the whole story. It also works like charm in video converting. For instance, free convert MKV to AVI format, as well as convert video to MP4, MOV, FLV, WMV, MPEG, etc. with adjustable resolution, bit rate and frame rate. Want convert an MKV file to MP4 try this step I hope this work for you. Run "VLC media player". From main menu select "Media" > "Convert / Save". On "File" tab, click "Add" button. Choose you MKV file. After that, it should be added to the list. (Alternatively, you can drag&drop a file into the list.) Click "Convert/Save" button. Tips: You are allowed to add the converted MKV files to iTunes directly, just go to the Preference settings and choose Convert > Automatically add files to iTunes Library after conversion option before starting. Part 2. Free MKV to iTunes Converter for Windows/Mac. Wondershare Free Video Converter is an free MKV to iTunes converter for both More than an MP4 to MKV converter. You can do so much more than just convert your videos to different video formats on VEED. VEED is an online video editing software that features plenty of tools to let you edit your videos like a pro. Make your videos look stunning by using camera effects and filters. You can also add images, audio, text, and VLC defaults to the first audio track. Specifically: I have a MKV video with two language audio tracks and I want to convert the video and the second audio track to DivX format using AVI as container. VLC however converts only the first audio track and I did not find an option for selecting another track. VLC Media Player is not only a multi-media player, but also a free and effective .mkv to MPEG converter. Then, follow me to see how to convert MKV to MPEG with VLC Media Player. Step 1. Run VLC and click Media on the menu bar. Then, choose “Convert/Save” on the drop-down list. Or you can directly press the shortcuts “Ctrl+R”. Step 2. Step 1. Run VLC Media Player, navigate to top menu bar and press "Media". Then select "Convert/Save" in context menu. Step 2. On the pop-up "Open Media" window, click on "+Add" button to import the MP4 file you want to convert, and press "Convert/Save" button. Step 3. DTcx.

how do i convert mkv to mp4 with vlc