How to Convert H.264 MKV Files to MP4 Without Re-encoding (Mac)

How to Convert H.264 MKV Files to MP4 Without Re-encoding (Mac)

Posted by · 67179 views · Translate
These are instructions on how to convert H.264 MKV files to MP4 without re-encoding.

Following this procedure will save you lots of time and prevent video quality degradation if you need video in mp4 format for playback through iTunes, the Apple TV, or on your iOS device.

***We have posted an easier version of this tutorial here, we suggest that most users follow that tutorial instead.***


IDENTIFY THE SOURCE VIDEO AND AUDIO
Before beginning lets get some details on the source video and audio.

Step One
Download and install VideoSpec to your Applications folder from here.

Step Two
Launch VideoSpec from your Applications folder.
How to Convert H.264 MKV Files to MP4 Without Re-encoding (Mac)

Step Three
Click Select from the toolbar.
How to Convert H.264 MKV Files to MP4 Without Re-encoding (Mac)

Step Four
Choose your .mkv file and click Open.
How to Convert H.264 MKV Files to MP4 Without Re-encoding (Mac)

Step Five
Make sure the video format is H.264 and take note of the Frame Rate (fps) and Audio Format.
How to Convert H.264 MKV Files to MP4 Without Re-encoding (Mac)

Important: Make note of the Encoding Profile. Some older Apple devices only support the Main profile so if your video is High Profile this procedure may not work. The new Apple TV supports High Profile at Level 4.0; however, we have tested level 4.1 and it worked fine in all attempts. The iPhone and iPad support High Profile level 4.1.


EXTRACT VIDEO AND AUDIO FROM MKV
Demux (ie extract) the video and audio tracks from the MKV container format.

Step One
Download and install iMKVExtract from here to your applications folder.
How to Convert H.264 MKV Files to MP4 Without Re-encoding (Mac)

Step Two
Launch iMKVExtract and click the Browse button to select your Matroska file.
How to Convert H.264 MKV Files to MP4 Without Re-encoding (Mac)

Step Three
Select your mkv file and click the Choose button.
How to Convert H.264 MKV Files to MP4 Without Re-encoding (Mac)

Step Four
Select the video and audio track for extraction. These are usually track one and track two.
How to Convert H.264 MKV Files to MP4 Without Re-encoding (Mac)

Change the target folder if need be and click the Extract button.

Step Five
iMKVExtract will let you know when the extraction is complete.
How to Convert H.264 MKV Files to MP4 Without Re-encoding (Mac)


CONVERT AUDIO TO AAC
If the audio track you extracted is NOT in AAC format than you will need to convert it. If it is in AAC format then you can skip this section.

Step One
You can use your favorite application to convert the audio or try Audio-Converter which can be downloaded from the Mac App Store here.

Step Two
Launch Audio-Converter from the Applications folder.
How to Convert H.264 MKV Files to MP4 Without Re-encoding (Mac)

Step Three
Set the Convert To: dropdown to AAC then set the destination folder to the folder than contains the files we extracted earlier.
How to Convert H.264 MKV Files to MP4 Without Re-encoding (Mac)

Step Four
Drop the audio file that was extracted from the mkv into Audio-Converter to begin conversion. Note: the audio files will likely be named audio2.ac3 or audio2.dts.
How to Convert H.264 MKV Files to MP4 Without Re-encoding (Mac)


COMBINE VIDEO AND AUDIO INTO MP4 FILE
Mux the .h264 video and the .aac audio file into a mp4 file using MP4Box.

Step One
Download MP4Box from here and save it to the same folder as your extracted video and audio. Double click to extract the archive if need be.
How to Convert H.264 MKV Files to MP4 Without Re-encoding (Mac)

Step Two
Open a new Terminal window from Applications:Utilities.
How to Convert H.264 MKV Files to MP4 Without Re-encoding (Mac)

Step Three
Navigate to the folder your video and audio is located in.
ie. cd ~/Desktop/[mkvextract]video
How to Convert H.264 MKV Files to MP4 Without Re-encoding (Mac)

Step Four
Execute the command to create a MP4 video. Make sure to specify the frame rate we noted earlier or your audio will be out of sync. Also be sure to use the .aac audio file and not the original.

ie. ./MP4Box -fps 23.976 -add video1.h264 -add audio2.aac video.mp4
How to Convert H.264 MKV Files to MP4 Without Re-encoding (Mac)

Step Five
MP4Box will now combine the video and audio tracks into a mp4 that can be added to iTunes!
How to Convert H.264 MKV Files to MP4 Without Re-encoding (Mac)

How to Convert H.264 MKV Files to MP4 Without Re-encoding (Mac)
SophiaGill - February 29, 2016 at 6:41pm
iFastime Video Converter Ultimate is just a right H.264 MKV video converter which can fully meet your needs. Why? It can convert all kinds of MKV files including H.264 MKV to MP4. The most advanced feature differing from many other converters is: there is no need for you to know which parameters are suitable for your mobile devices, TV or any media players. Cause our professional video Converter has set ready-made profile as an output format, which concludes all formats compatible with your devices. Even if you’re a complete newbie for technical parameters towards media formats, this software make it easy for you to play any MKV video or any other formats with ease.
freetimed - January 16, 2016 at 3:25am
You can use Avdshare Video Converter to Convert MKV to Play MKV in iTunes, iPad, iPhone.
Adma - March 9, 2015 at 10:38pm
Just look up the app Beamer. This will solve your problems...
waderelle - June 24, 2014 at 9:48am
Here is a guide at: http://www.faasoft.com/articles/stream-mkv-to-apple-tv.html The first thing to know or has well known is that there are only two official and free methods to stream video files to Apple TV from computer: iTunes or AirPlay. Unfortunately, neither of the two supports MKV as the input format. Likewise, you'll be greatly disappointed if you turn to other alternatives since most of them are not only expensive but also have inevitable defects: only support several formats, require installing some plug-ins, and with an endless line of embedded goods, etc. To successfully stream MKV or HD MKV to Apple TV, here, I strongly recommend to convert MKV to Apple TV as well as iTunes and AirPlay supported formats
ghnabs - December 6, 2013 at 1:52am
I know a simple and fast way to stream and play MKV on Apple TV, Apple TV 2 or the new Apple TV 3: Convert MKV to Apple TV as well as iTunes compatible video format to stream MKV to Apple TV from iTunes for playing MKV on ATV successfully here: http://www.bigasoft.com/articles/stream-and-play-mkv-on-apple-tv.html
16 More Comments
Recent