Why Some MKV Won't Work with Gear VR on Galaxy S7/S7 Edge/S6/Note7/5/4
Samsung Gear VR by default supports most common file formats including MKV, MP4, AVI, and FLV. When it comes to playing 3D videos, Gear VR requires either side-by-side or top-bottom (top down). However, a MKV is just a container format, holding video, audio, image or subtitle files in it. The video and audio files in different MKV files can be encoded with different codecs. For example, an MKV file with DTS audio can't be rendered on Gear VR. Fast research in the Internet has shown, that the problem was in audio codecs and the list of supported by Oculus audio formats. As it turned out AC3 and DTS audio are not supported by Oculus Video Players yet. If your MKV media contains AC3 or DTS audio, it will not work on Oculus player in Oculus Cinema.
Three solutions to get MKV to play on Gear VR with proper audio
Soluton 1: Encode MKV to Gear VR with VidCoder (Free but a little complex）
Basically you won't be able to play MKV file on Gear VR as it is, you will need to encode it to the supported format. Here comes a free solution that I chose for myself after browsing dozens of articles and forums.
1. You will need to download and install on your computer VidCoder – free but simple to use and very functional software.
2. Run the app and choose the file you want to encode.
3. Than choose the folder you want the encoded file to be saved and hit Settings button, we will create a preset so next time when you need to encode the movies the further steps would be unneeded.
Pay attention, that in case your movie has several languages, you need to choose and audio track you want to use. Settings screen has 4 tabs, but we will need just 2 of them.
In Picture tab, select Container MP4 and make sure no cropping would be done to the output file. That means that the picture will not be resized and there will no quality loss for the picture.
4. Now move to the Audio Tab
Choose AAC or MP3 as the codec and set Stereo as Mixdown (of course if you have fancy 5.1 earphones you can leave at as default).
5. Now hit Save button and enter the name of the template, so the next time you won't need to enter the settings again.
6. Now go back to the VidCoder home screen and press Encode button.
Now wait till the process is completed and copy the file from your computer to the phone.
That's it! By the way, this program works perfectly fine with 3D movies as well, and won't need to change the Settings to encode your 3D video, and then refer to the steps to play 3D on Gear VR.
Soluton 2: Convert MKV to Gear VR with Dimo (Direct and effective）
To fix these problems, the effective and simple way is to change MKV to a fully compatible format with Gear VR. We've rated and ranked the best 3D Video Converter software on the market today. And Dimo Video Converter Ultimate is one of the top one which allows you to enable MKV with AC3 playable in Gear VR by converting MKV to Gear VR friendly MP4 video with with zero quality loss in stunning Top-bottom and Sidey-by-side 3D effect. Besides viewing MKV video on Gear VR, if you also wanna put other media files like MTS, MXF, VOB, 3D YouTube videos as well as DVD, Blu-ray movies to Gear VR for playback.
It not only offers customized profile preset for VR devices like Gear VR, Oculus Rift and HTC Vive, it allows you the tweak the video, audio parameters so that you can get a decent file as you want. For those who are running on Mac OS X(Sierra, El Capitan included), you can get Dimo Video Converter Ultimate for Mac to achieve your goal. Here goes the step by step guide of MKV conversion for Gear VR on Windows 10/8,1/8/7/XP, mac workflow is as the same.
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Steps to Convert MKV with AC3 to Gear VR supported format
1. Load MKV videos
This application allows you to import your MKV files in two different ways. You can either click "Add file" button to browse your local directory or you can simply choose to drag-and-drop your local MKV videos onto the program. Then, you can see these files will appearing on the left item tray as thumbnails.
2. Choose the optimized format for Gear VR
Open the "Select Format" drop-down format list and select SamsungGear from Device > VR as the output format. The default setting will work great for your Gear VR.
Tips: Click the "Settings" button and customize proper video/audio parameters if necessary. Video size, bitrate and fame rate are flexible and can be adjusted as you like. According to Oculus Support Center, we recommend using 1280x720 HD resolution to encode your videos. Higher resolutions will not provide any better quality, meaning you'll waste space and processing power. We also recommend using a higher bit rate than a typical web stream at that resolution, as the pixels in your video will be magnified on the phone's screen.
The optimal bit rate is content dependent, and many videos can get by with less, but 5 Mb/s should give good quality. (Note: While H.264 is the recommended video coding, H.265 videos can also be played, Dimo Video Converter Ultimate can also encode any video to H.265 videos for watching)
3. Add 3D Side-by-side effect
Before start the MKV conversion for Gear VR, you can click Edit, turn to 3D tab and choose "Left-right" or "Top-Bottom" to create 3D SBS/TB video files. Or crop the source video so as to get the part you want, trim the ads part off, add watermark, adjust special effect, etc..
4. Convert MKV to a Gear VR supported format
Click "Start" on the main window. This Video Converter is highly efficient and it will finish the MKV to Gear VR conversion in minutes. After the conversion, you can transfer all the converted MKV files to watch on Gear VR.
How to view 3D video files on your Gear VR via Galaxy Note 4/5 or Galaxy S7/S6?
To view your SBS 3D video files on your Gear VR, there is an additional steps:
1. On your MicroSD card file directory, navigate to Oculus > Movies > Your Movies
2. Create a new folder within "Your Movies" and label it "3D"
3. Import or move your side-by-side 3D videos into your newly created "3D" folder
Once you have created your 3D content folder and imported compatible video files, insert your MicroSD card into your Galaxy Note 4 (if it isn't already), dock the phone in your Gear VR, and don the virtual reality headset. Then:
1. Navigate to Oculus Cinema from the main menu
2. Navigate to "My Videos" from the Oculus Cinema content library menu
3. Select the 3D video you wish to view (if you followed the above steps it should have a "3D" label in the upper righthand corner)
4. Choose the cinema mode to begin playback
Now importing your own 3D content for viewing on Samsung Gear VR through your Galaxy Note 4 or Galaxy Note 5, Galaxy S6/S6 Edge/S6 Edge+. We'll be sharing more of these helpful tips and tricks in the coming days.
Solution 3: Root your phone and add codecs for AC3 (Not commonly used)
Following is the guide:
1. Put the file media_codecs.xml in the folder system/etc
2. Put the files libsac3d.so & libsomxac3d.so in the folder system/lib
3. Set permissions to all 3 files: 0644 (owner: root/root)
4. Reboot
Above are three solutions for Gear VR playing MKV movie with AC3 audio. Select one of them and solve this "MKV no sound in Gear VR" issue. Of course, you can also try other VR players for Gear VR to enable MKV with AC3 playable in Gear VR, but remember to choose one that support MKV with AC3 or other 7.1 audio channels to avoid continuous issues.
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Source: Three solutions to Play MKV on Gear VR with proper audio
