How To Convert An MKV File To An MP4

A select number of media players can handle MKV files, but most will require you to convert your files into a different format. Here's how to do so, whether you want to utilize a desktop application or a web-based service.

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[Valatea]

Im not very big brain in the tech department and ive been sitting here for hours trying to convert my videos using different crappy apps. This video was an absolute blessing and I am sososo thankful I came across it.

[jabecklongplays]

You can also do this on OBS Studio if you capture a media file and select the mkv you want to convert. just make sure obs is capturing in mp4, it takes longer but it actually works

[joedave]

I need to give my thanks to this video and it’s creator, because I needed to submit a video for a college class and the file was MKV. The website used works on mobile devices too, or at least IPhones.

[achoexodia]

Could not find tag for codec opus in stream #1, codec not currently supported in container
. Conversion failed!

[rollingthunder]

Thank you so much, I've been trying to covert something for so long but none of the ways people were telling me seemed to work. Thanks for the help xx

[anthonyswanson]

Thank you for this video. I followed the instructions, but the video would still not play.

[Radski]

I wish all instructional videos were like this

[eurositi]

Pause the image at 0:59. Notice the source file isn't even an MKV file but an M4V (aka. MP4) file (so technically almost the exact same as the destination file).
If you want to avoid unnecessary (and time wasting) video conversion, select the option "Dump raw input" in this screen instead. In most cases you can simply "switch containers" in a few seconds using this method.
*NOTE*: This method will only work if the video inside the MKV file are in H.264 (AVC) or H.265 (HEVC) format. You can check this by playing the video file normally in VLC, and then click on Tools > Codec settings... Check what it says under "codec" for the video.

[windycarney]

good, thx. also for quick and easy conversion to any file formats, google ZillaTube

[howl]

Thanks man You saved my intro keep up the good work!

[saltyincubus]

THIS IS AMAZING!!!! Thank you so much, it helped me XD
And of course relieved me of so, so many headaches <3

[_.alaa._]

BRO this helped so much YOU ARE THE BEST THANKS MUCH

[ranksboys]

Thank you and GOD bless you and your family.

[Firstclasskais]

when i do it i get a error not helpfull

[nicolebrown]

Thanx so much for posting....This vid helped A LOT!

[Sneakyzq]

TYSM MY GOSH EVERYBODY ELSE DOES SOME FREAKING DOWNLOAD AND HAVE VIDEOS THAT ARE LIKE 5 MINS LONG THXXX

[coloniellizardt]

MKV is a very situational format, while those with DTS-HD Master Audio and/or DTS:X sound will play just fine, it's those mixed in Dolby TrueHD and/or Dolby Atmos that are the problem for me. But if I convert them to M2TS or MP4, I don't get audio anymore, what should I do?

[bobspez]

I tried to convert an 873MB 4K .mkv file to .mp4 with the Cloud converter, but about half way through the conversion it stopped and said the file was too large. I also tried to convert it with VLC, followed all the settings advised, but it creates a file with audio and no video. But thanks to Professor Moriarity's comment below I downloaded the AVC (Any Video Converter) program. AVC worked perfectly to convert my 873MB 7 min 53 sec 4K .MKV 25fps file to MP4.

[rajnaidu]

The first one is tough and almost impossible on mac, but the second one really works

[Najvalsa]

Or, for a way quicker method, just simply change the container.

One way is to use ffmpeg with a simple bat file:
ffmpeg -i [name of video].mkv -c:v copy -c:a copy output.mp4